Enhancing Long Term Planning Processes and Products and Preliminary 2019 Long-Term Demand Forecast - Prepared for: Stakeholder Engagement Thursday ...

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Enhancing Long Term Planning Processes and Products and Preliminary 2019 Long-Term Demand Forecast - Prepared for: Stakeholder Engagement Thursday ...
Enhancing Long Term Planning Processes and Products
and
Preliminary 2019 Long-Term Demand Forecast

Prepared for: Stakeholder Engagement

Thursday January 31, 2019
the values reported in this presentation are for discussion purposes only and are in draft form

Agenda

Part A: annual planning outlook:
1) Enhancing long term planning processes and products
2) Long term planning stream
Part B: Preliminary Demand Forecasting:
1) Overview and background
2) 2019 Gross demand assumptions
3) 2019 Net demand assumptions
4) Evolution of long-term forecasting
5) Next steps

                                                                                                       2
the values reported in this presentation are for discussion purposes only and are in draft form

Purposes of today’s engagement

• Enhancing Long-Term Planning Processes and Products:
  o   Continue a two-way conversation on the IESO’s planning strategy
  o   Provide an overview of the preliminary long-term demand forecast and seek
      stakeholder feedback
  o   Inform and educate on recent changes to the IESO’s planning processes, focusing on
      the release of the December 2018 Reliability Outlook
  o   Seek feedback on improvements to the quarterly Reliability Outlook
• Preliminary 2019 Long-Term Demand Forecast:
  o   To provide stakeholders with an update on the IESO’s electricity annual planning
      outlook
  o   To support greater transparency in the IESO’s demand forecasting processes
  o   To provide an overview of key planning assumptions in the preliminary demand
      forecasting
  o   To obtain feedback on assumptions on inputs on the preliminary forecast

                                                                                                           3
the values reported in this presentation are for discussion purposes only and are in draft form

Disclaimer

The information and data presented herein does
not represent IESO’s forecast of future demand,
but is preliminary information used to seek
stakeholder input around the long-term demand
forecast process and assumptions.
Further engagements will take place throughout
the year, and the IESO’s forecast of demand and
adequacy will come in Q3 2019.

                                                                                                    4
the values reported in this presentation are for discussion purposes only and are in draft form

Opportunities for feedback

• The opportunity to ask questions and provide feedback during
  today’s presentation
• Stakeholders are also invited to provide written feedback or
  comments on:
   o   The effectiveness of the meeting
   o   The contents and questions posed during today’s presentations
   o   Information you would like to see at future meetings
   o   The quarterly Reliability Outlook and preliminary demand forecast
   o   Preliminary 2019 Long-Term Demand Forecast:
          Gross demand drivers
          How to forecast for energy efficiency programs and codes and standards
          How to forecast for embedded generation
• Email us: engagement@ieso.ca
• Today’s presentation materials will be available on our website:
  http://www.ieso.ca/Sector-Participants/Engagement-
  Initiatives/Engagements/20-Year-Planning-Outlook
                                                                                                            5
the values reported in this presentation are for discussion purposes only and are in draft form

PART A:
ANNUAL PLANNING OUTLOOK

                                                                                             6
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ENHANCING LONG TERM
PLANNING PROCESSES AND
PRODUCTS

                                                                                            7
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Recent and future Ontario electricity outlooks

• 2016 Independent Electricity System Operator (IESO) Ontario Planning
  Outlook (OPO):
  o Published: September 1, 2016
  o http://www.ieso.ca/sector-participants/planning-and-
     forecasting/ontario-planning-outlook
• 2018 IESO Technical Planning Conference (TPC):
  o Hosted: September 13, 2018
  o http://www.ieso.ca/en/Sector-Participants/Planning-and-
     Forecasting/Technical-Planning-Conference
• 2019 IESO annual planning outlook:
  o Planned to be published: Q3 2019, to aid in identifying anticipated
     system requirements in the coming years
• 2020 onwards: IESO annual planning outlook

                                                                                                        8
the values reported in this presentation are for discussion purposes only and are in draft form

IESO’s Planning Activities

• Most of IESO’s planning activities are categorized as Analyses or
  Publications and Stakeholder Engagement:
     Analyses
     •   Ensure long-term reliability of Ontario’s power system
     •   Support operation of the IESO Administered Market
     •   Inform policy
     •   Satisfy regulatory obligations and market rule requirements

     Publications & Stakeholder Engagement
     •   Enhance planning transparency
     •   Share relevant and valued information, data, analysis and expertise with
         the sector
     •   Strengthen stakeholder relationships
     •   Prepare for the information requirements of the Incremental Capacity
         Auction (ICA) and the provision of reliability products and services for the
         market

                                                                                                            9
the values reported in this presentation are for discussion purposes only and are in draft form

 IESO’s Planning Activities:
 Analyses are made of 3 parts: Demand Forecast, Adequacy Assessments and Impact
 Analysis. The demand forecast is the starting point of all analyses

                             Demand Forecast                     Identifies future
                                                                 electricity demand

                     Resource and Transmission                   Assess if the existing plan can
                      Adequacy Assessments                       satisfy anticipated demand

Publications         Yes           Is plan
                                  sufficient?

                                         No, acquisition needed

                                  Market
               Yes               mechanism          No                                                   Evaluates
               (ex: global                                                    Impact analysis            options
                                 available?         (ex: regional
               capacity                             planning)

                                                                                                                 10
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Strategy to Evolve IESO Planning Publications

• There will be two streams of IESO planning publications:
   o      Operational Planning ensures a viable operating plan (e.g. outages); and
   o      Long-Term Planning signals resource adequacy needs

  •Reliability outlook                                             Annual planning outlook:
  •Five year reserve                                               • Annual report with 10 - 20 year horizon
   margin requirements                                             • Identifies long-term requirements to
  •Ontario planning                                                  inform investment and asset management
   outlook and modules                                               decisions
  •Comprehensive
   review of resource                                              Reliability Outlook:
   adequacy
                                                                   • Quarterly report with 18 month horizon,
  •Etc.                                                              extending out 60 months biannually
                                                                   • Assesses potential adverse conditions that
                                                                     might be avoided through adjustment or
                                                                     coordination of outage plans

             Today                                                                     Future

                                                                                                               11
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         Planning in public

         • The 2018 Technical Planning Conference launched a new era of
           planning, enhancing transparency to support market development
         • The IESO posted stakeholder responses1 and found 3 themes:
              1) Transparency:
                    o     Publish detailed data, assumptions and methodologies that underpin IESO planning assessments to
                          enable stakeholders to evaluate risks and opportunities using their own assumptions and methods
                    o     Granularity should be at the generator level, similar to NYISO Gold Book
                    o     Transmission projects and limits should be published
              2) Consistency:
                    o     Consistent approach around methodologies and conclusions
                    o     Alignment of adequacy assessments including reserve requirements across all planning timeframes
                          and publications
                    o     Alignment between time frames: 18 month, 60 month and 20 year outlook and reports (Achievable
                          Potential Study, NERSC)
                    o     Use of standardized terms and techniques, consistent with other jurisdictions and market renewal
              3) Engagement:
                    o     Make use of targeted sessions, more frequent meetings and workshops for stakeholders
                    o     Engage earlier than the release of a planning outlook

1   http://www.ieso.ca/en/Sector-Participants/Planning-and-Forecasting/Technical-Planning-Conference                              12
the values reported in this presentation are for discussion purposes only and are in draft form

Enhancing the IESO’s Long Term Planning Process

• Strategy:
  o Create a new report to provide timely and transparent information, on a
    regular basis, to guide investment decisions and market development
• Frequency: Annually
• Timing: Beginning in Q3 2019
  o The exact timing of future annual planning outlooks may change to
    respond to the development of the ICA
• Horizon: 10 to 20 years
• Scope:
  o Information in the annual planning outlook will be informed by the
    development of the Bulk Planning Process and coordinated with and
    support market development, including the ICA
• The 2019 annual planning outlook will inform capacity requirements in
  interim capacity acquisition

                                                                                                       13
the values reported in this presentation are for discussion purposes only and are in draft form

Annual planning outlook process

                    Analyses                                             Publications

           Comprehensive Demand
                 Forecast                               Planning outlook
 Year 1

                                                                                          ICA Pre-Auction
                                                         & status of bulk
                                                                                              Report
             Resource Adequacy                                plans
                Assessment

           Demand Forecast Update
                                                        Planning outlook
  Year 2

                                                                                          ICA Pre-Auction
                                                         & status of bulk
             Resource Adequacy                                                                Report
                                                              plans
                Assessment

           Demand Forecast Update
                                                        Planning outlook
  Year 3

                                                                                          ICA Pre-Auction
                                                         & status of bulk                     Report
             Resource Adequacy                                plans
                Assessment

                                                                                                            14
the values reported in this presentation are for discussion purposes only and are in draft form

Enhancing the IESO’s Long Term Planning Process
The IESO is seeking your input on a staged development approach that prioritizes (1) consistency and high quality data, (2)
requirements for ICA or Regulatory requirements, and (3) Completion of Bulk Planning Process. Potential products in future
years is provided below for discussion purposes

                                                                                                  2022
                                                                                                  • Incorporation of
                                                                                                    bulk planning
                                                                   2021                             process
                                                                   • Ancillary
                                                                     Services/Essential           • ICA Pre-Auction
                                    2020                                                            Report
                                                                     Reliability Service
                                    • Zonal Adequacy
                                                                     Requirements
                                    • Cost Details
     2019                                                            (Voltage /
                                    • Avoided                        Frequency)
     • Resource
                                      Costs/Emissions              • Detailed
       Adequacy Needs
                                    • Natural gas                    gas/electric
     • Nuclear
                                      supply risks                   interoperability
       Refurbishment
       Risks                        • Operability                    or other fuel risks
                                      Needs (Flexibility
     • Marginal Pricing
                                      / Ramping)
     • Reporting of
       Transmission
       Initiatives and
       Activities                                             Ongoing Stakeholder Engagement

                                                                                                                     15
the values reported in this presentation are for discussion purposes only and are in draft form

Enhancing the IESO’s Long Term Planning Process
To address transparency, the annual planning outlook will provide more detail and methodology that enables stakeholders
to assess risks and opportunities when making asset management or investment decisions, using their own assumptions and
methods
Contents of the 2019 annual planning outlook will include:
• Demand Forecast
• Global Resource Adequacy:
  o Reserve Margin Requirement
  o Sensitivity Analyses or Scenarios for Reserve Margin Calculations
  o Capacity required to maintain adequacy
• Transmission:
    o Recap of last five years
    o Ongoing Studies and Initiatives
    o Future plans (end of life, enabling markets, retirements)
• Planned Outcomes (emissions, marginal cost forecasts)
• Methodology Document
• Excel Data Tables

                                                                                                                   16
the values reported in this presentation are for discussion purposes only and are in draft form

Improving the Long Term Planning Process
To address consistency, the annual planning outlook will consolidate reports where feasible

• Planning reports that focus on system planning (i.e. not regional
  planning) will be consolidated into a single report
• The report satisfies requirements for a Technical Report pursuant to
  Section 25.29 (3) of the Electricity Act, 1998
• For 2019, the following IESO reports will be consolidated:
    o    Ontario Reserve Margin Requirements Report
    o    Outlook for Technical Planning Conference
• IESO planning also produces reports to comply with NERC and NPCC
  requirements, including NERC’s Long Term Reliability Assessment,
  NPCC’s Comprehensive/Interim Review of Resource Adequacy, and
  NPCC’s Long Range Adequacy Overview
• Where feasible, the IESO will strive for consistency across these studies.
  Where models or assumptions differ, an explanation will be provided
  by the IESO

                                                                                                                    17
the values reported in this presentation are for discussion purposes only and are in draft form

Improving the Long Term Planning Process
To address engagement, additional sessions are planned to inform and educate readers in advance of the release of the
annual planning outlook

                                                   Scoping               This section

                                                                                                  Immediately
    Full day
                                                                                                  following
workshop in              Resource                                          Demand
                                                                                                  section.
 Q2 2019 on              adequacy                                          forecast               Feedback
methodology
                                                                                                  period is open

                                              Transmission                Bulk Planning
                                                                          Stakeholder
                                               assessment
                                                                          Engagement

                                                                                                                   18
the values reported in this presentation are for discussion purposes only and are in draft form

Improving the Long Term Planning Process
To address engagement, the Technical Planning Conference will be scheduled shortly after the release of the annual
planning outlook, where we will ask stakeholders to inform us of how they would like to continue engagement throughout
the year
                                                                                • Ongoing engagement
                                                                                  can include surveys,
                                                                                  smaller focus groups,
                                                                                  webinars and in
                                                                                  person sessions
                                                                                • The engagement
                  Technical                                                       would likely focus on:
                  Planning                                                           o Details on
                                                                                       methodology and
                  Conference                                                           assumptions
                                                                                     o Areas of
                                                                                       improvement for
                                                                                       the annual
                                                                                       planning outlook

                                                                                                                   19
the values reported in this presentation are for discussion purposes only and are in draft form

Preliminary 2019 Long-Term Demand Forecast and
annual planning outlook

                                                                                            Q3-Q4 2019
                                                                                            • Publication of 2019 annual
                                                                                              planning outlook
                                                             Q2 2019                        • Technical Planning
                                                             • Public stakeholder             Conference
                                                               engagement regarding
                            February                           methodology to the 2019
                                                               annual planning outlook to
                            • Feedback period from
                                                               provide an understanding
                              stakeholder engagement of at
 January                      least 10 business days
                                                               of our existing approach
                                                               and methodology
 •Public Stakeholder        • Incorporate stakeholder
                                                             • Inform stakeholders of key
                              feedback in the 2019 Long-
  Engagement of                                                changes in approach and
                              Term Demand Forecast for
                                                               methodology, and identify
  Preliminary 2019            Resource Adequacy
                                                               areas where additional
  Long-Term Demand            Assessment (end of February
                                                               stakeholder education is
                              2019), incorporating
  Forecast                    stakeholder feedback
                                                               required
  (January 31)

                                                             Ongoing Stakeholder Engagement

                                                                                                               20
the values reported in this presentation are for discussion purposes only and are in draft form

Feedback: Enhancing Long Term Planning Processes
and Products

  Written feedback or comments can be sent to engagement@ieso.ca
  • Discussion Questions:
    o   Does the strategy address your feedback from Technical Planning
        Conference?
    o   Are there additional considerations for 2019? For future years?
    o   Does the proposed approach to evolving planning products satisfy your
        requirements? Are there aspects of reporting development that should be
        re-prioritised?

                                                                                                        21
the values reported in this presentation are for discussion purposes only and are in draft form

PART B:
PRELIMINARY DEMAND
FORECASTING

                                                                                            22
the values reported in this presentation are for discussion purposes only and are in draft form

1) OVERVIEW AND
   BACKGROUND

                                                                                           23
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Overview

                       Preliminary Demand Forecast
                                      Methodology

   6 Drivers &    Gross
  Assumptions    Demand

                                                                                          Resource &
                   Net                                             Revised
   3 Drivers &
  Assumptions    Demand
                                  0        Stakeholder
                                           Engagement              Forecast
                                                                                         transmission
                                                                                           adequacy
                                                                                         assessments

                  Grid
  Evolution
                 Demand

                               Sensitivity analysis
                                                                                                       24
the values reported in this presentation are for discussion purposes only and are in draft form

Role of Long-Term Demand Forecasting

•   Electricity demand forecasting anticipates future requirements for the services that electricity provides. Electricity
    requirements are affected by many factors, including choice of energy form, technology, equipment purchasing
    decisions, behaviour, demographics, population, the economy, energy prices, transportation policy and conservation
    o     The IESO monitors and interprets these and other factors on an ongoing basis to develop outlooks against which
          integrated planning can take place
•   Updates to the electricity demand forecast provide context for updated integrated plans, energy efficiency program
    planning and supply procurement decisions. Analysis focuses on understanding what is causing the changes in
    demand by focusing on the end uses and sector trends
•   The IESO is introducing more transparency into our planning processes by providing updated information to the
    market and regularly engaging with stakeholders to enable them to make more informed decisions and investments
•   The IESO conducts short, medium and long-term integrated power system planning for the province. The demand
    for electricity establishes the context for integrated planning as it determines the amount of electricity that must be
    served

Forecast      Why                                                                                        When
Long Term     Annual planning outlook: the IESO forecast of energy and demand for                        Annually
              a 10 - 20 year timeframe which is utilized to inform system adequacy and
              investment decisions

Medium        Reliability Outlook: the IESO's assessment of the reliability of the Ontario electricity   18-Month: Quarterly
Term          system over the medium term                                                                18 & 60 Month: Bi-Annually

Short Term    1-10 Day ahead: the published numbers in the 1 Day Ahead forecast are used to              Daily
              commit generation Day Ahead as part of the Day Ahead Commitment process. This
              improves reliability and helps ensure we will have sufficient generation in real-time
              to meet demand

                                                                                                                               25
the values reported in this presentation are for discussion purposes only and are in draft form

Long-Term Demand Forecast
•   Goals:
    o    The IESO conducts a long-term demand forecast to inform system adequacy and investment
         decisions
    o    The demand forecast is the foundational piece used to initiate the IESO complete annual planning
         outlook; It is also one of the core inputs into the Resource Adequacy Outlook, which will be critical
         to incorporate into Incremental Capacity Auction (ICA)
    o    The preliminary demand forecast presented is a baseline forecast or ‘business as usual’ forecast and
         is used for retention, comparison, and possible consideration in the creation of scenarios
•   Data:
    o    The demand forecast is developed based on the most recent and best available data at the time
    o    Where possible other government agencies were leveraged for forecast data, however due to lack of
         available required long-term data, many third Party resources or consultants were sourced
    o    Within the 20 year time horizon, there is greater confidence in the short term (years 1-5), with a
         lesser degree of confidence in the long term (years 11-20)
    o    Assumptions are based on primary and secondary research including:
             Industry research
             Historical trends

                                               Updates in 2019
                                           2019 annual planning
             Changes                                                                        2016 OPO
                                                  outlook
             Base year                                 2017                                     2015
        Planning horizon                           2020-2040                                 2016-2035

                                                                                                                 26
the values reported in this presentation are for discussion purposes only and are in draft form

Development Process

                                    Preliminary

      Gross Demand: the total demand for electricity services in Ontario
               prior to the impact of conservation programs

                                    In-Progress
          Net Demand: Ontario Gross Demand minus the impact of
                        conservation programs

                                     Evolution
       Grid Demand: Ontario Net Demand minus the demand met by
      embedded generation. It is equal to the energy supplied by the bulk
       system to wholesale customers and local distribution companies
                  through the IESO-administered markets

                                                                                                       27
the values reported in this presentation are for discussion purposes only and are in draft form

How is the long-term load forecast developed

• Analysis for the forecasts are done at the end use level
• End Use Forecaster (EUF) model is an accounting model of equipment
  and appliance stock of different efficiency level by end use
• Gross demand includes the effects of naturally occurring conservation,
  but not of new energy efficiency programs
                            Load forecasting process

                                                                                                        28
the values reported in this presentation are for discussion purposes only and are in draft form

Preliminary Long-Term Demand Forecast

• Once finalized the, long-term demand forecast which will be
  employed for the overall 2019 annual planning outlook will consists of
  a net forecast
• Net level refers to the gross demand less the impact of:
  o Energy efficiency programs and
  o Codes & standards
• The data is broken out into:
  o Hourly (8,760 or 8,784 data points per zone per year)
  o Long-Term for the 2020 - 2040 period
  o At the IESO Zonal Level (10 zones: Northwest, Northeast, Essa,
     West, Southwest, Bruce, Toronto, Niagara, East, Ottawa)

                                                                                                       29
the values reported in this presentation are for discussion purposes only and are in draft form

      Historical demand: 2005 - 2018

                  • Energy demand has been on a declining trend over the past decade,
                    driven by changes to the economy, conservation savings, and
                    embedded generation
                                    165

                                    160
       Annual Energy Demand (TWh)

                                    155

                                    150

                                    145

                                    140

                                    135

                                    130
                                          2005             2007               2009            2011                2013            2015         2017

                                                 Embedded Generation         Consevation      Grid Level Demand          Net Level Demand   Gross Level Demand

Note: Due to data delays 2018 embedded generation values are estimated                                                                                  30
the values reported in this presentation are for discussion purposes only and are in draft form

2016 OPO vs Actuals: 2016 - 2018

          •                                  All forecasts have an inherent degree of forecast error:
                                             o The graph below demonstrates the difference of the 2016 forecast vs. actuals for the 2016 – 2018
                                                  period at the net level
                                             o 2018 values are based on current best estimates for embedded generation and weather correction
                                       165

                                       160
Annual Net Level Energy Demand (TWh)

                                       155

                                       150

                                       145

                                       140

                                       135

                                       130
                                                            2016                                   2017                                   2018

                                                                     2016 - 2018 Actual                                2016 IESO OPO

                                                                                                                                                         31
the values reported in this presentation are for discussion purposes only and are in draft form

2) 2019 PRELIMINARY
   GROSS DEMAND
   ASSUMPTIONS

                                                                                           32
the values reported in this presentation are for discussion purposes only and are in draft form

Gross Demand

             Gross Demand: the total demand for
           electricity services in Ontario prior to the
               impact of conservation programs

         Net Demand: Ontario Gross Demand minus
             the impact of conservation programs

         Grid Demand: Ontario Net Demand minus the demand
          met by embedded generation. It is equal to the energy
         supplied by the bulk system to wholesale customers and
             local distribution companies through the IESO-
                           administered markets

                                                                                                     33
the values reported in this presentation are for discussion purposes only and are in draft form

The IESO Gross demand forecast considers key drivers to
derive the forecast
• Key drivers:
   o Change in number and type of residential households
   o Change in amount of commercial floor space
   o Change in industrial output/activities
• Electricity price and natural gas price forecast:
   o Consumer react to changes in price. High electricity price may apply downward
     pressure on demand while, mild or temporary price relief is less likely to cause
     the demand to go back up again
         Short term behavioural response to price that reflects changes in equipment utilization
          without changing the equipment itself is captured through the use of behavioural price
          elasticity
         The range of the elasticity is from -0.25 to -0.1 and captures behaviour such as lowering
          thermostats and turning off lights and computer monitors
   o Rate design impacts - annualized price effect of ICI is included in the sector price
     forecast
• Policy Environment:
    o Climate change policy and initiatives
    o Economic development and industrial policy

                                                                                                             34
the values reported in this presentation are for discussion purposes only and are in draft form

Gross Demand: Comparison of 2019 annual planning outlook
key assumptions
• Only factors that have significant change since the previous
  outlook are included in the key assumptions table on the
  following slide
• The following slides will explain the development of the
  gross demand forecast and the associated assumption and
  details
• IESO seeking feedback on all factors and assumptions

                                                                                                     35
the values reported in this presentation are for discussion purposes only and are in draft form

Gross Demand: Comparison of 2019 annual planning outlook
key assumptions
                                                      2019 annual                             2019 annual planning outlook
       Sector                2016 OPO              planning outlook             Years 1 - 5               Years 6 - 10             Years 11 - 21
                                                      comparable               (2020 - 2024)             (2025 - 2029)             (2030 - 2040)
                        Floor space grows by       Floor space grows by
1) Commercial floor     736 M sqft, 21.9 % or      587 M sqft, 17.7 % or    Floor space grows by      Floor space grows by      Floor space grows by
      space                   1.2 % / yr                 1.0 % / yr          202 M sqft, 6.0 % or      150 M sqft, 4.2 % or      359 M sqft, 9.7 % or
                          from 2018 – 2035           from 2018 – 2035             1.2 % / yr                0.8 % / yr                0.8 % / yr

                                                                                                      Electric vehicles grows
                        Electric vehicles grows   Electric vehicles grows   Electric vehicles grows                             Electric vehicles grows
 2) Electric Vehicles                                                                                            by
                         by 978 k, or 24 % / yr    by 825 k, or 21 % / yr     by 157 k, 298 % or                                   by 480 k, 92 % or
        (EVs)                                                                                             310 k, 147 % or
                           from 2018 – 2035          from 2018 – 2035             31.8 % / yr,                                         6.1 % / yr,
                                                                                                            19.9 % / yr,
                                                                                    to 210 k                                             To 1 M
                                                                                                              to 520 k

                        Households grows by Households grows by                                                                Households grows by
   3) Residential
                        1.0 M, 18 % or 1 % / yr 1.3 M, 24 % or 1.3 % / yr Households grows by Households grows by                644 k, 10.0 % or
    households                                                           440 k, 7.8 % or 1.5 % / yr 375 k, 6.2 % or 1.2 % / yr
                           from 2018 – 2035         from 2018 – 2035                                                                0.9 % / yr
                                                  Mining sector continues
                               Flat load
 4) Industrial Load                                      to grow                                Mining sector continues to grow
                           from 2018 – 2035
                                                     from 2018 – 2035

                        GO Rail electrification   GO Rail electrification
                         & LRT projects as         & 7 LRT projects as
                                                                                                        GO Rail system
      5) Transit          planned by 2016            planned by 2016
                                                                            First 6 LRTs in service electrification as well as No additional projects
                         + 548 GWh annual          + 1,403GWh annual
                                                                                                          2 LRT phases
                           energy demand             energy demand
                          from 2018 – 2035          from 2018 – 2035

                                                  Dramatic increase due     Dramatic increase due
                                                  to greenhouse load in     to greenhouse load in
   6) Agriculture         Flat load 2.2 TWh                                                             Flat load 3.9 TWh         Flat load 4.0 TWh
                                                    southern Ontario          southern Ontario
                          from 2018 – 2035                                                                    in 2029                   in 2040
                                                         4.0 TWh            + 0.8 TWh to 3.9 TWh
                                                    from 2018 – 2035               in 2024

                                                                                                                                               36
the values reported in this presentation are for discussion purposes only and are in draft form

1) Commercial floor space

• IESO conducted an analysis of commercial floor space with the support
  of third-party consultant
• Forecasted to be 190 million square feet less (4.6 %) by 2035 than 2016
  OPO:
  o Equivalent to about 3 TWh, all else being equal
  o Differences attributed to:
        A continuing trend of decreasing square footage per worker achieved
         through alternative workplace strategies and more efficient building
         design, particularly evident in major urban locations
        Shifts in consumer purchasing behaviour are opening up opportunities
         for new forms of retailing, such as e-commerce
        As the shift in retailing changes the retail real estate landscape, e-
         commerce and other technological advances are also affecting the
         industrial real estate market, with increasing demand for large
         warehousing, logistics and distribution hubs to support online shopping
         as well as data centres

                                                                                                         37
the values reported in this presentation are for discussion purposes only and are in draft form

1) Commercial floor space

                                        4.1
                                                                                                                          Years 11 – 21
                                                                                                                       Floor space growth
                                                                                                                              10 %,
                                        4.0
                                                                                                                           0.8 % / yr
Annual Commercial Floor Space Availability

                                        3.9

                                                                                     Years 6 – 10
          (Billion Square Feet)

                                        3.8
                                                                                  Floor space growth
                                                                                         4 %,
                                                                                      0.8 % / yr
                                        3.7
                                                            Years 1 – 5
                                                        Floor space growth
                                        3.6                    6 %,
                                                            1.2 % / yr

                                        3.5

                                        3.4

                                        3.3
                                              2018   2020     2022       2024       2026          2028   2030   2032     2034      2036     2038      2040

                                                               Preliminary 2019 Demand Forecast                         2016 IESO OPO

                                                                                                                                                      38
the values reported in this presentation are for discussion purposes only and are in draft form

1) Commercial floor space: assumptions

                       Low Case                                                                           Proposed Case                                                  High Case
      Years 1 - 5     Years 6 - 10     Years 11 - 21                                     Years 1 - 5        Years 6 - 10        Years 11 - 21        Years 1 - 5        Years 6 - 10        Years 11 - 21
     (2020 - 2024)    (2025 - 2029)    (2030 - 2040)                                    (2020 - 2024)       (2025 - 2029)       (2030 - 2040)       (2020 - 2024)       (2025 - 2029)       (2030 - 2040)
      Floor space     Floor space       Floor space                                      Floor space        Floor space          Floor space         Floor space        Floor space          Floor space
   grows by 4.7 % grows by 3.3 % grows by 7.3 %                                       grows by 6.0 %      grows by 4.2 %      grows by 9.2 %      grows by 7.6 %      grows by 6.4 %      grows by 14.5 %
   over the period over the period over the period                                    over the period     over the period     over the period     over the period     over the period     over the period
   (avg 0.9 % / yr) (avg 0.6 % / yr) (avg 0.7 % / yr)                                 (avg 1.2 % / yr)    (avg 0.8 % / yr)    (avg 0.9 % / yr)    (avg 1.5 % / yr)    (avg 1.3 % / yr)    (avg 1.5 % / yr)
    3.5 billion sqft 3.6 billion sqft 3.9 billion sqft                                 3.6 billion sqft    3.7 billion sqft    4.1 billion sqft    3.7 billion sqft    3.9 billion sqft    4.5 billion sqft

                                             4.5
Annual Commercial Floor Space Availability

                                             4.3
          (Billion Square Feet)

                                             4.1

                                             3.9

                                             3.7

                                             3.5

                                             3.3
                                                   2018      2020       2022       2024       2026           2028         2030           2032           2034           2036         2038           2040
                                                    Preliminary 2019 Demand Forecast - High Demand Case                           Preliminary 2019 Demand Forecast - Reference Case
                                                    Preliminary 2019 Demand Forecast - Low Demand Case

                                                                                                                                                                                                  39
the values reported in this presentation are for discussion purposes only and are in draft form

2) Electric vehicles: assumptions

• Globally the early adoption of electric vehicles (EVs) in many
  jurisdictions has been driven by government policy
   o   The main markets by volume (China) and sales share (Norway) have the strongest policy push
• IESO’s approach on EV electricity demand forecast:
   o   Focuses on potential electricity energy demand and peak impact for the purposes of electricity
       demand forecast and power system planning
   o   Based on available Ontario specific data such as EV sales and registration data
   o   Scenarios developed from various annual growth rate of new sales
   o   Comparable with EV outlooks from various organizations
• A wide range of EV projections from various organizations, e.g.
  forecasts of EV new sale market shares vary from 1% to 28% in 2020,
  and from 1% to 70% in 2030
• The IESO’s estimates are informed by EV information from various
  organizations:
   o   International Energy Agency
   o   Navigant Research
   o   Bloomberg New Energy Finance
   o   Boston Consulting Group
   o   Simon Fraser University
   o   Ministry of Transportation of Ontario

                                                                                                              40
the values reported in this presentation are for discussion purposes only and are in draft form

2) Electric vehicles

• For electricity demand forecast and power system planning
  purposes, it is estimated that EV new sales will continue to
  grow moderately in the next decade and stabilize thereafter
• Recent changes of EV policy may result in a declining
  impact on EV adoption:
  o Ontario Electric Vehicle Incentive Program discontinued
    in September 2018
  o US announced freezing Corporate Average Fuel
    Economy (CAFE) standards in 2018, leading to impacts
    to supply of new EVs in Ontario
• EVs on Ontario roads will reach about 1 million around
  2040 and the annual charging demand is about 3.4 TWh

                                                                                                      41
the values reported in this presentation are for discussion purposes only and are in draft form

2) Electric vehicles

                                                                                                                               Years 11 – 21
                                               10                                                                             EV count growth
                                                                                                                                   92 %,
                                                                                                                                  6 % / yr
                                               9
Annual Units in Operation (100,000 Vehicles)

                                               8

                                               7

                                                                                          Years 6 – 10
                                               6                                        EV count growth
                                                                                            148 %,
                                                                                           20 % / yr
                                               5

                                               4

                                                                Years 1 – 5
                                               3              EV count growth
                                                                  298 %,
                                               2
                                                                 32 % / yr

                                               1

                                               0
                                                    2018   2020     2022       2024       2026       2028   2030     2032      2034       2036     2038      2040
                                                                      Preliminary 2019 Demand Forecast                         2016 IESO OPO

                                                                                                                                                             42
the values reported in this presentation are for discussion purposes only and are in draft form

       2) Electric vehicles: assumptions & sensitivities

                                                                   Low Demand Case                                  Proposed Case                                     High Demand Case
                                             Years 1-5                Years 6-10      Years 11-21      Years 1-5      Years 6-10       Years 11-21       Years 1-5       Years 6-10       Years 11-21
                                            (2020-2024)               (2025-2029)     (2030-2040)     (2020-2024)     (2025-2029)      (2030-2040)      (2020-2024)      (2025-2029)      (2030-2040)
                                                            10% annual increase in EV sales                 20% annual increase in EV sales                   35% annual increase in EV sales
            *170 k           320 k            500 k            210 k            520 k           1,000 k           280 k            980 k           2,300 k
       vehicles by 2024 vehicles by 2029 vehicles by 2040 vehicles by 2024 vehicles by 2029 vehicles by 2040 vehicles by 2024 vehicles by 2029 vehicles by 2040

                                                      2.4

                                                      2.2
       Annual Units in Operation (Million Vehicles)

                                                      2.0

                                                      1.8

                                                      1.6

                                                      1.4

                                                      1.2

                                                      1.0

                                                      0.8

                                                      0.6

                                                      0.4

                                                      0.2

                                                      0.0
                                                            2018        2020        2022       2024        2026       2028          2030        2032       2034         2036       2038         2040
                                                               Preliminary 2019 Demand Forecast - High Demand Case                         Preliminary 2019 Demand Forecast - Reference Case
                                                               Preliminary 2019 Demand Forecast - Low Demand Case

* Note: the values presented are for the period ending                                                                                                                                          43
the values reported in this presentation are for discussion purposes only and are in draft form

3) Residential households

• IESO conducted analysis on residential households by data
  supported by third-party consultant
• Forecasted to be 150,000 more households (2.3 %) by 2035
  than 2016 OPO:
  o Equivalent to about 1.5 TWh, all else being equal
  o Variance factors include increased net migration
  o The forecast assumes increasing multi-residential
    households is increasing relative to single-family
    households, as seen in the Toronto, Ottawa, Southwest
    and Niagara IESO Zones

                                                                                                     44
the values reported in this presentation are for discussion purposes only and are in draft form

3) Residential households
                                                                                                                                            Years 11 – 21
                                                            7.1                                                                            Household growth
                                                                                                                                                 9 %,
                                                                                                                                              0.9 % / yr
Annual Residential Sector Household Availability (Million

                                                            6.9

                                                            6.7

                                                                                                        Years 6 – 10
                                                                                                      Household growth
                                                            6.5                                             6 %,
                                                                                                         1.2 % / yr
                         Units)

                                                            6.3
                                                                              Years 1 – 5
                                                                            Household growth
                                                                                  8 %,
                                                            6.1                1.5 % / yr

                                                            5.9

                                                            5.7

                                                            5.5
                                                                  2018   2020    2022       2024       2026         2028   2030   2032      2034      2036     2038      2040
                                                                                 Preliminary 2019 Demand Forecast                         2016 IESO OPO

                                                                                                                                                                        45
the values reported in this presentation are for discussion purposes only and are in draft form

      4) Industrial assumptions

      • With the exception of mining, most of the industries are relatively flat
        o the mining sub-sector is forecasted to continue to grow
                                    22

                                    20

                                    18

                                    16
       Annual Energy Demand (TWh)

                                    14

                                    12

                                    10

                                    8

                                    6

                                    4

                                    2

                                    0
                                         2018   2020   2022       2024       2026       2028   2030     2032      2034       2036     2038      2040
                                                         Preliminary 2019 Demand Forecast                         2016 IESO OPO

* Includes impact of November 26, 2018 announcement of closure of GM Oshawa assembly plant                                                      46
the values reported in this presentation are for discussion purposes only and are in draft form

      4) Industrial assumptions

                                     22

                                     20

                                     18

                                     16
       Annual Energy Demand (TWh)

                                     14

                                     12

                                     10

                                      8

                                      6

                                      4

                                      2

                                      0
                                          2018          2020      2022        2024        2026    2028       2030       2032      2034         2036        2038       2040
                                    Preliminary 2019   Demand Forecast - Mining                          Preliminary 2019 Demand Forecast - Primary Metal Manufacturing
                                    Preliminary 2019   Demand Forecast - Paper Manufacturing             Preliminary 2019 Demand Forecast - Automotive Vehicle Manufacturing
                                    Preliminary 2019   Demand Forecast - Chemical Manufacturing

* Includes impact of November 26, 2018 announcement of closure of GM Oshawa assembly plant                                                                          47
the values reported in this presentation are for discussion purposes only and are in draft form

5) Transit assumptions

• Energy demand and timing of transit projects have been updated from
  most recent available information
• Metrolinx’s plan considers GO Rail system electrification in service by
  2025, which will add about 1.1 TWh electricity demand. Various LRT
  projects will add about 0.3 TWh
                             1.4

                             1.2
Annual Energy Demand (TWh)

                             1.0

                             0.8

                             0.6

                             0.4

                             0.2

                             0.0
                                    2018          2020          2022          2024          2026          2028   2030         2032          2034          2036          2038       2040
                                   Preliminary 2019 Demand Forecast - Metrolinx GO Rail System Electrification    Preliminary 2019 Demand Forecast - Light Rail Transit Projects
                                   2016 IESO OPO

                                                                                                                                                                                   48
the values reported in this presentation are for discussion purposes only and are in draft form

5) Transit assumptions (continued)

• The expected in service schedule is summarized from public
  information of respective projects as of January 2019
Project                               2019      2020    2021        2022        2023        2024        2025       2026   2027   2028    2029        2030

GO Rail system electrification
                                                                                                       Phase 1/1
(GTA)

Hamilton LRT (Hamilton)                                                                    Phase 1/1

ION LRT (Waterloo / Kitchener)      Phase 1/2                                                                                           Phase 2/2

Hurontario - Main LRT                                              Phase 1/1
(Mississauga)

Confederation LRT (Ottawa)          Phase 1/2                                  Phase 2/2

Eglinton crosstown (Toronto)                           Phase 1/1

Sheppard east (Toronto)                                                                                                                 Phase 1/1

Finch west (Toronto)                                                           Phase 1/1

                                                                                                                                                    49
the values reported in this presentation are for discussion purposes only and are in draft form

6) Agricultural sector: assumptions

•                             Leamington area has seen lots of load connection requests due to greenhouse growth (vegetable and cannabis
                              greenhouses) that is expected to increase the region’s winter peak
•                             A 500+ MW winter load growth is expected in 2020 and beyond
•                             Forecast is supported by local/regional studies
•                             In 2017, summer peak in IESO West zone is ~3,000 MW, winter peak is ~2,000 MW. The potential increase in
                              load due to greenhouse expansion is approximately 25 % of IESO West zone’s winter peak
•                             The IESO continues to monitor other agricultural regions in Ontario (e.g. Hamilton, Niagara, etc.) for possible
                              inclusion in a future IESO annual planning outlook
                             3.9

                             3.7
Annual Energy Demand (TWh)

                             3.5

                             3.3

                             3.1

                             2.9

                             2.7

                             2.5

                             2.3

                             2.1

                             1.9
                                   2018   2020     2022       2024      2026        2028   2030      2032     2034       2036     2038      2040
                                                    Preliminary 2019 Demand Forecast                          2016 IESO OPO

                                                                                                                                            50
the values reported in this presentation are for discussion purposes only and are in draft form

Electricity price assumptions
• The IESO requires a pricing assumptions for the forecast. The following
  assumptions have been made:
  o Assumes electricity prices as was updated in the 2017 electricity
    price forecast, with an adjustment for the later part of the price
    outlook to reflect ICA costing methodology:
      Residential electricity price forecast includes the Ontario Fair
       Hydro Plan
      Commercial electricity price forecast assumes a delivery cost
       based on the General Service < 50 MW rate class from the OEB
       yearbook
      The industrial rate forecast is a 55:45 blend of distribution
       embedded industrial rates and direct connect industrial rates.
       The distribution rate is based on the historical unit rate for the
       General Service > 50 kW, Large User (> 5,000 kW) and Sub
       Transmission rate classes from the OEB yearbook

                                                                                                        51
the values reported in this presentation are for discussion purposes only and are in draft form

Natural gas price assumptions

• The IESO requires a pricing assumptions for the forecast. The following
  assumptions have been made:
  o Assumes natural gas prices as was updated in Sproule’s Dawn price
    forecast for October 2018
  o Sproule’s October 2018 natural gas price outlook at Dawn is
    projected to be below $ 4.00 / MMBtu, at an average unit rate of
    about $ 3.90 / MMBtu (in real 2018 $)
      Significantly lower than the December 2015 outlook which
       assumed an average unit rate of about $ 5.30 / MMBtu
       (in real 2018 $)
  o Natural gas retail rate forecast is based on a Dawn price forecast for
    the gas supply charge and Union Gas southern M1 and M2 rates for
    residential and commercial delivery charges, respectively
      The industrial delivery charge is assumed to be a rate below the
       commercial rate of about 2 ¢ / m3

                                                                                                        52
the values reported in this presentation are for discussion purposes only and are in draft form

Price sensitivity due to carbon pricing

• Electricity and natural gas prices are an important element to the
  demand forecast as consumers’ response to varying price signals may
  dictate which fuel they use for applications such as space or water
  heating
• Natural Gas Prices: the natural gas prices included in the forecast did
  not include any carbon pricing. Sensitivity analysis was performed,
  which indicated that inclusion of a carbon price did not materially
  impact fuel switching and resulting forecast electricity demand
• Electricity Rates: the electricity rates included in the forecast were
  based on the previous Supply/Demand Outlook, which included
  carbon pricing in the form of Cap and Trade. However, the impact of
  carbon pricing on electricity bills is minimized in the near-term due to
  the 25% bill reduction applied to residential customers through the
  Ontario Fair Hydro Plan
• The forecast will be updated to reflect the most up-to-date carbon
  pricing policy applied at the time

                                                                                                       53
the values reported in this presentation are for discussion purposes only and are in draft form

      Demand by sector

      • Over the forecasting horizon, commercial sector grows the most mainly due to
        the structural shift of employment from manufacturing sector to service sector
      • The second notable sector is agriculture growth mainly in Southern Ontario
                                    190
                                    180
                                    170
                                    160
                                    150
       Annual Energy Demand (TWh)

                                    140
                                    130
                                    120
                                    110
                                    100
                                     90
                                     80
                                     70
                                     60
                                     50
                                     40
                                     30
                                     20
                                     10
                                      0
                                          2018         2020     2022       2024      2026      2028      2030        2032        2034      2036       2038           2040
                                           Residential        Commercial          Industrial      Transportation (EVs & Transit)        Agriculture          Other

* Others = Remote communities, Generator Demand, Water treatment, and Street Lighting                                                                            54
the values reported in this presentation are for discussion purposes only and are in draft form

Major gross forecast updates of 2019 forecast vs 2016
forecast
• Major factors which contributed to the change include:
   o Technical assumptions regarding residential-sector heating end-uses:
     the profiling of heating demand has been updated leading to higher
     winter peak demands
   o Agricultural growth: increased electricity demand in the
     agricultural sector in southern Ontario due to increased number of
     growers, greenhouses and adoption of growth lights
• Near term highlights: years 1 - 5 (2020 - 2024):
   o Summer peak is relatively similar to 2016 OPO between 2020 and
     2023. Energy and winter peak is forecasted to be about 4% higher
     than 2016 OPO forecast by 2024 mainly due to greenhouses and
     adjustments to residential heating load
• Mid-term term highlights: years 6 - 10 (2025 - 2029):
   o Energy, summer peak and winter peak is forecasted to be 9%, 5%
     and 8% higher than 2016 OPO forecast by 2029 mainly due to
     absence of committed EE programs post 2020
                                                                                                         55
the values reported in this presentation are for discussion purposes only and are in draft form

Preliminary gross demand energy forecast comparison
                            Subject to change
• Gross demand is the total demand for electricity services in Ontario
  prior to the impact of conservation programs, and embedded
  generation
                             184

                             181

                             178

                             175
Annual Energy Demand (TWh)

                             172

                             169

                             166

                             163

                             160

                             157

                             154
                                   2018   2020   2022     2024      2026       2028       2030       2032   2034     2036      2038      2040

                                                                  Preliminary 2019 Gross Demand Forecast

                                                                                                                                         56
the values reported in this presentation are for discussion purposes only and are in draft form

Preliminary gross demand seasonal peak forecast comparison
                                                                                         Subject to change
                                          30,500

                                          29,500
Annual Seasonal System Peak Demand (MW)

                                          28,500

                                          27,500

                                          26,500

                                          25,500

                                          24,500

                                          23,500
                                                   2018     2020       2022       2024      2026         2028   2030      2032       2034       2036       2038         2040

                                                    Preliminary 2019 Gross Demand Summer Peak Forecast            Preliminary 2019 Gross Demand Winter Peak Forecast

                                                                                                                                                                       57
the values reported in this presentation are for discussion purposes only and are in draft form

Feedback: Gross forecast drivers

  Written feedback or comments can be sent to engagement@ieso.ca
  • Discussion Questions:
     o   What should the IESO consider in the assumptions for the gross forecast
         drivers:
            Commercial floor space
            Electric vehicles
            Residential households
            Industrial load
            Transit projects
            Agricultural load
            Other: should the IESO consider drivers other than those presented?

                                                                                                          58
the values reported in this presentation are for discussion purposes only and are in draft form

3) 2019 PRELIMINARY NET
   DEMAND ASSUMPTIONS

                                                                                           59
the values reported in this presentation are for discussion purposes only and are in draft form

Net Demand

               Gross Demand: the total demand for
             electricity services in Ontario prior to the
                 impact of conservation programs

         Net Demand: Ontario Gross Demand minus
             the impact of conservation programs

         Grid Demand: Ontario Net Demand minus the demand
          met by embedded generation. It is equal to the energy
         supplied by the bulk system to wholesale customers and
             local distribution companies through the IESO-
                           administered markets

                                                                                                     60
the values reported in this presentation are for discussion purposes only and are in draft form

Net Demand: Comparison of 2019 annual planning outlook
key assumptions
                                       2019 annual                   2019 annual planning outlook
                                        planning
    Driver           2016 OPO                               Years 1 - 5          Years 6 - 10        Years 11 - 21
                                         outlook
                                       comparable          (2020 - 2024)        (2025 - 2029)        (2030 - 2040)
                                                Program savings                Program savings      Program savings
                                   Program         persistence                    persistence          persistence
                                    savings    continue to decay,             continue to decay,   continue to decay,
   1) Energy    Annual energy                  11.3 TWh in 2024.               6.5 TWh in 2029.     0.1 TWh in 2040.
                                  persistence
Efficiency (EE) savings of 15.8                 Seeking input on               Seeking input on     Seeking input on
                                  continue to   assumptions for                assumptions for      assumptions for
   Programs      TWh in 2035
                                decay, 1.5 TWh EE for 2019 -2020              EE for 2019 -2020    EE for 2019 -2020
                                    in 2035     CFF and beyond                 CFF and beyond       CFF and beyond
                                                      CFF                            CFF                  CFF
                                   Annual energy Annual energy Annual energy Annual energy
                                   savings of 14.4   savings of 9.2    savings of 11.5 savings of 15.3
                   Annual energy TWh in 2035. To TWh in 2024. To TWh in 2029. To TWh in 2040. To
 2) Codes &
                   savings of 14.9 be updated to     be updated to      be updated to      be updated to
 Standards
                    TWh in 2035 reflect changes in reflect changes in reflect changes in reflect changes in
                                     federal and      federal and        federal and        federal and
                                   provincial C&S provincial C&S provincial C&S provincial C&S
                   1,000 MW peak 1,400 MW peak
 3) Industrial
                      reduction     reduction                           1,400 MW peak reduction
 Conservation
                     from 2018 –   from 2018 –                              from 2018 – 2040
Initiative (ICI)
                         2035          2035

                                                                                                                61
the values reported in this presentation are for discussion purposes only and are in draft form

1) Energy efficiency: assumptions

• The previous 2016 OPO required a forecast of conservation annual
  savings of 30 TWh in 2032:
    o    From programs implemented since 2005
    o    Of which 16 TWh was expected to be achieved from EE programs and 14 TWh was
         expected to be achieved from Codes and Standards
• The 2015 - 2020 CFF is
    o    higher than the forecast in 2016 OPO and
    o    expected to deliver more than its target of 8.7 TWh annual energy savings in 2020
• Current assumptions used to forecast EE programs include:
         2015  -2017
          2015 -2017               2018
                                   2018                  2018-2020                     2020+

         Verified:          Forecasted:                Forecasted:
                                                                                    Seeking
          5.7 TWh             1.1 TWh                    4.2 TWh
                                                                                   feedback
        persisting to       persisting to              persisting to
                                                                                   and input
            2020                2020                       2020
•   Note: verified programs savings decay over time once measures installed

                                                                                                               62
the values reported in this presentation are for discussion purposes only and are in draft form

1) Energy efficiency: assumptions

                              14

                              12

                              10
Annual Energy Savings (TWh)

                              8

                              6

                              4

                              2

                              0
                                   2018   2020         2022       2024        2026      2028   2030        2032       2034        2036       2038   2040
                                             Historical Program Savings (2006 - 2017)                 Forecast Program Savings (2018 - 2020)

                                                                                                                                                    63
the values reported in this presentation are for discussion purposes only and are in draft form

       1) Energy efficiency: assumptions (continued)

       • In addition to IESO managed EE programs, additional non-
         ratepayer funded EE programs, administrated via
         organization such as the Toronto Atmospheric Fund and
         Community Energy Plans* which contribute to energy
         efficiency savings
       • Federal Government Low Carbon Economy Fund programs
         announced in 2017 may contribute to electricity energy
         efficiency ($420m)

* External EE program forecasts are not incorporated in current demand forecast due to limited data.                             64
  The IESO is seeking input from public regarding forecast data
the values reported in this presentation are for discussion purposes only and are in draft form

2) Codes & Standards

• Building Codes:
  o Ontario building codes requires new and renovated buildings to
    meet certain energy efficiency levels, updated approximately every 5
    years
• Equipment Standards:
  o Minimum energy performance standards requires all products sold
    to comply with a minimum energy efficiency levels, results in gains
    in household appliances and other products for consumers and
    businesses
• Savings estimates are based on the expected improvement in building
  codes and specified end uses equipment standards
• An effective energy efficiency tool that embeds energy savings in
  buildings and equipment upgrades through regulation and requires no
  incremental ratepayer investment
• Savings from codes and standards are forecasted to be approximately 15
  TWh by 2040
                                                                                                       65
the values reported in this presentation are for discussion purposes only and are in draft form

2) Codes & Standards

• The IESO estimates savings to be attributed to Codes and Standards by
  comparing the reference case demand forecast to the forecast adjusted for
  the impacts of regulations
• Generally, the regulations become more stringent over time which lead to
  more efficient products and buildings. Based on the regulation effective
  time, the energy saving analyses were performed by the following
  categories:
   o   Existing and committed equipment standards: regulations are already in effective or have been
       announced with future effective dates
   o   Future equipment standards: assumed increases of efficiency level
   o   Existing building codes: regulations are already in effective
   o   Future building codes: assumed more stringent energy efficiency requirements
• The IESO reviews and monitors the existing and committed regulations.
  There is higher confidence to achieve the estimated savings
• The anticipated efficiency level improvements of future codes and
  standards are considered and the resulted savings are estimated. They are
  based on the third-party studies and general trends. Future regulations
  may deviate from the assumptions and lead to higher or lower savings
                                                                                                               66
the values reported in this presentation are for discussion purposes only and are in draft form

2) Codes & Standards

                              16

                              14

                              12
Annual Energy Savings (TWh)

                              10

                              8

                              6

                              4

                              2

                              0
                                    2018         2020          2022         2024          2026     2028   2030        2032          2034         2036          2038         2040
                                   Preliminary 2019 Demand Forecast - Future Equipment Standards          Preliminary 2019 Demand Forecast - Existing & Committed Equipment Standards
                                   Preliminary 2019 Demand Forecast - Future Building Codes               Preliminary 2019 Demand Forecast - Existing Building Codes
                                   2016 IESO OPO

                                                                                                                                                                           67
the values reported in this presentation are for discussion purposes only and are in draft form

3) Industrial Conservation Initiative: method

• The ICI program is a function of Regulation 429/04
• Forecast methodology:
  o is retrospectively based on 2017 system peaks and reported demand reductions:
       results become available in Q4 of subsequent year, thus 2018 reported results are unavailable
       program rule changes were implemented for 2017, thus 2015 - 2016 reported results are not applicable
       includes transmission connected customer actual data and distribution connected customer estimated data due to lack of availability
  o to account for activity outside of top 5 peak demand hours and incorporate a profile of reduction instead of just
    demand reduction during a single hour
• Methodology also needed to account for peak potentially occurring during both summer and winter
  seasons:
  o A total of 10 days were given forecast ICI reductions: 5 days with a peak reduction of approx. 1,400 MW (1,000 MW in
    2016 OPO) and 5 days with 700 MW (325 MW in 2016 OPO) peak demand reduction. This is based on trends seen in
    2017
  o A generic hourly ICI profile for peak days was developed based on reductions observed in directly-connected Class A
    customers
  o The timing of these 10 days depends on the size of the summer peak relative to the winter peak for that year. Years
    were separated into 3 categories:

   Category                                               Criteria                                                ICI Applies To:

                          Three or more of the top five peak days occur in the
Clear Summer                                                                                                   Top 10 summer days
                                                summer.

                        All five peak days are in the winter. The fifth-ranked
 Clear Winter                                                                                                   Top 10 winter days
                        winter peak day is 5 % higher than the summer peak.

                                                                                                                                        68
the values reported in this presentation are for discussion purposes only and are in draft form

3) Industrial Conservation Initiative: assumptions

• ICI Forecast Assumptions:
                           o     The ICI reductions are assumed for the duration of the forecast
                           o     Peak demand grid impact remains at 1,400 MW for the top 5 days and 700 MW and
                                 the next 5 highest days
                           o     Below shows the profile of ICI impact during a typical ICI day
                          0.0
                          -0.1
                          -0.2
                          -0.3
Hourly Load Impact (GW)

                          -0.4
                          -0.5
                          -0.6
                          -0.7
                          -0.8
                          -0.9
                          -1.0
                          -1.1
                          -1.2
                          -1.3
                          -1.4
                          -1.5
                                 1      3      5        7        9         11        13      15       17        19       21        23
                                                                        September 25, 2017

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the values reported in this presentation are for discussion purposes only and are in draft form

3) Industrial Conservation Initiative: sensitivities

• The current demand forecast assumes the same level of uptake for all
  years in the planning period (20 years):
  o   A total of 10 days were given forecast ICI reductions: 5 days with a peak reduction of
      approx. 1,400 MW and 5 days with 700 MW peak demand reduction
• Possible low and high demand cases revolve around a range of possible
  changes to many factors:
  o   Participant eligibility
  o   Demand reduction criteria
  o   Demand reduction thresholds
  o   Pricing structure
  o   Growth in energy storage
  o   Ability of consumers to predict annual system peaks
  o   Others
• The IESO is seeking stakeholder engagement feedback on how to
  forecast Industrial Conservation Initiative going forward

                                                                                                            70
the values reported in this presentation are for discussion purposes only and are in draft form

Feedback: Energy Efficiency Programs, Codes and
Standards and Industrial Conservation Initiative

  Written feedback or comments can be sent to engagement@ieso.ca;
  • Discussion Questions:
    o   What considerations should the IESO incorporate in forecasting:
           Energy Efficiency Program savings?
            □   What considerations should be applied for 2019 – 2020?
            □   What considerations should be applied post-2020?
            □   How to incorporate non-funded IESO program and is there data to support the analysis?
           Codes and Standards savings?
            □   What consideration should be made towards existing vs future savings?
           Industrial Conservation Initiative savings?
            □   What assumptions should be considered for future ICI savings in the long term forecast?
            □   Is there an ability for distributors to provide hourly Class A customer data?
                Note, monthly data is currently provided
            □   Is there access to market intelligence on the volume of battery storage that is being stalled?

                                                                                                                 71
the values reported in this presentation are for discussion purposes only and are in draft form

6) EVOLUTION OF LONG-
   TERM DEMAND
   FORECASTING

                                                                                           72
the values reported in this presentation are for discussion purposes only and are in draft form

Evolution of Demand Forecasting

                                     Preliminary

       Gross Demand: the total demand for electricity services in Ontario
                prior to the impact of conservation programs

                                     In-Progress
           Net Demand: Ontario Gross Demand minus the impact of
                         conservation programs

                                      Evolution
        Grid Demand: Ontario Net Demand minus the demand met by
       embedded generation. It is equal to the energy supplied by the bulk
        system to wholesale customers and local distribution companies
                   through the IESO-administered markets

                                                                                                        73
the values reported in this presentation are for discussion purposes only and are in draft form

Evolution

• Currently in the initial and exploratory stages evolving demand
  forecasting; in preparing for the ICA
• Enhancing statistical forecasts will aid in moving towards grid
  demand forecasts would make it easier for the IESO to be able to
  compare performance of forecast against actual data and make
  necessary adjustments in the model if issues are noticed over
  time, as well as better quantify forecast uncertainty:
  o Parallel enhancements will also be made to gross and net
    demand forecasts
• Further evolving the forecast from net demand  grid demand -
  may better illustrate the difference and commonality between the
  annual planning outlook and the Reliability Outlook; two
  documents produced for different purposes
• The successful evolution will be dependent on improved quality
  of data
                                                                                                      74
the values reported in this presentation are for discussion purposes only and are in draft form

Embedded Generation

• IESO contracted resources: Forecast based on IESO contract
  resources. This data includes a high degree of certainty; including
  fuel specific generation profiles:
   o   Capacity by fuel (solar, wind, biomass, hydro and natural gas)
   o   Projected capacity combined with region specific production profiles
   o   Results in projected production
• Non-Contracted resources: Apply high-level aggregated data
  received by the IESO from LDC. This data is less granular and less
  certain:
   o   FIT and MicroFIT program: With the end of these programs the changes to non-
       contracted resources will connect with distribution systems therefore the IESO
       visibility will decrease
   o   Net IESO-contracted program: Should there be increased uptake, additional data
       and insight will be required in order to forecast appropriately
   o   Behind the meter generation (BMG): As customers react to electricity prices there
       may be increased BMG occurring therefore additional data would be required to
       support accurate forecasting

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