Generation Interconnection Facility Study Report For PJM Generation Interconnection Request Queue Position AB1-081 Anaconda - Heartease 115kV 56 ...

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Generation Interconnection
        Facility Study Report

                 For

PJM Generation Interconnection Request
      Queue Position AB1-081

     Anaconda – Heartease 115kV
   56 MW Capacity / 80 MW Energy

                              Revised March / 2018

Introduction
This Facilities Study has been prepared in accordance with the PJM Open Access Transmission
Tariff §207, as well as the Facilities Study Agreement between Harts Mill Solar, LLC,
(Interconnection Customer (IC)) and PJM Interconnection, LLC (Transmission Provider (TP)).
The Interconnected Transmission Owner (ITO) is Virginia Electric and Power Company
(VEPCO).

General
The IC has proposed a solar generating facility located near Tarboro, NC in Edgecombe County.
The installed facilities will have a total capability of 80 MW with 56 MW of this output being
recognized by PJM as capacity. The proposed in-service date for this project is December 31,
2021. This study does not imply an ITO commitment to this in-service date.

Point of Interconnection
Queue AB1-081 will interconnect with the ITO transmission system via a new three breaker ring
bus switching station that connects on the Anaconda – Heartease portion of the Anaconda –
Hathaway 115kV line # 80.

Cost Summary
The AB1-081 project will be responsible for the following costs:

Description Total Cost
Attachment Facilities $ 505,291
Direct Connection Network Upgrades $4,721,367
Non Direct Connection Network Upgrades $1,849,641
Allocation for New System Upgrades $0
Contribution for Previously Identified Upgrades $0
Total Costs $7,076,299

A. Transmission Owner Facilities Study Summary
1. Description of Project
Queue AA2-177 is a request to interconnect 80 MW (Capacity 56 MW) of energy from a new
solar facility to be located near Tarboro NC in Edgecombe County. The proposed facility will
interconnect with ITO’s Anaconda – Heartease 115kV line #80 via a new three breaker
switching station (Harts Mill). The requested in-service date is December 21, 2021. Attachment
Facility and Direct Connection Network upgrade construction is estimated to be 18-24 months.

2. Amendments to the System Impact Study data or System Impact Study
Results
None

3. Interconnection Customer’s Submitted Milestone Schedule
 Plan to break ground 3/01/2020
 Turn over flat, graded site with one inch of gravel to ITO for new Harts Mill switching
station 2/01/2019
 Permits – state level Permit By Rule and county level Final Site Plan approval complete
by 9/01/2019
 Substantial site work completed 3/01/2019
 Delivery of major electrical equipment 6/01/2019
 Back Feed Power 12/02/2019
 Commercial Operation 12/15/2019

4. Scope of Customer’s Work
IC will build a solar generating facility in Edgecombe County, North Carolina. The generating
facility (Harts Mill Solar) will be comprised of solar arrays. AB1-081 consists of 54 x 1.48 MW
ABB Ultra-1500 inverters. The 27 x 34.5/0.690 kV generator step up (GSU) transformers with a
rating of 3.0 MVA will connect the solar inverters to the 34.5 kV collector system. The
generating facility will connect to the Point of Interconnection (POI) via a 115/34.5 kV wye
grounded wye grounded main power transformer with a rating of 56/72/88 MVA. The AB1-081
POI will be at the new Harts Mill 115kV substation.

5. Description of Facilities Included in the Facilities Study
The ITO will connect the proposed generator lead via Attachment Facilities to a new Harts Mill
115kV switching station adjacent to the 115kV transmission right of way on a property provided
by the IC. Harts Mill switching station will be positioned in such a way that the new backbone
will align with the perpendicular bisector at structure 80/114. The Hathaway – Tarboro 115kV
#80 line will be cut and attached to the new backbone and risers will be dropped from both sides
of the backbone to the bus sections directly underneath the backbone. The lines will consume
two of the three positions in the ring bus. The third position will be for the 115-kV feed from
IC’s collector station. The demarcation point between the switching station and the collector
station will be the 4-hole pad on the ITO disconnect switch which is located on the first
Attachment Facility structure outside of the Harts Mill switching station. The IC will bring its

bus to the demarcation point. Metering equipment will be installed in the Harts Mill switching
station. The grounding systems for both stations will be tied together. All substation permitting,
site preparation and grading activity will be performed by IC.

6. Total Costs of Transmission Owner Facilities included in Facilities Study

Direct Indirect
Work Description Labor Material Labor Material Total Cost

Attachment Facilities $280,186 $160,007 $48,671 $16,427 $505,291
Total Attachment Facilities Cost $260,186 $160,007 $48,671 $16,427 $505,291

Harts Mill 115 kV Switching Station
(n5476) $2,039,855 $2,103,451 $356,564 $221,497 $4,721,367
Line #80 Transmission work (n5478) $430,792 $360,184 $128,710 $119,150 $1,038,836
Remote relay (n5477) $468,802 $217,871 $93,326 $30,806 $810,805

Total Network Upgrades $2,939,449 $2,681,506 $578,600 $371,453 $6,571,008
Total Project Costs $3,219,635 $2,841,513 $627,271 $387,880 $7,076,299

7. Summary of Milestone Schedules for Completion of Work Included in
Facilities Study:
Facilities are estimated to take 20 - 26 months to construct and this is based on the ability to
obtain outages to construct and test the proposed facilities.

Proposed Schedule
 Engineering 4 - 6 months
 Construction 16 - 20 months

Engineering and construction timelines are based on the IC providing a graded and permitted site
to the ITO at the time of executing ICSA. ITO requires the site to be fully graded and permitted
site so they can start construction by October 2020. The estimated time to construct and build
the proposed facilities is based on typical permitting timelines actual permitting requirements
required by local zoning conditions may impact this schedule.

B. Transmission Owner Facilities Study Results
1. Attachment Facilities
The Attachment Facilities include that portion of the interconnecting switching station which is
associated solely with the single feed to the generating facilities. The equipment associated with
the Attachment Facilities includes the following:

Purchase and install:
1. One (1), 115kV, 2000A Center Break Switch
2. Three (3), 115kV, Metering Accuracy CCVT’s
3. Three (3), 115kV, Metering Accuracy CT’s
4. Conductors, connectors, conduits, control cables, foundations, steel structures

Purchase and install relay material:
1. One (1), 1109 – 28” Dual SEL-587Z Transmission Bus Panel
2. One (1), 4200 – Bus Differential C.T. M.U. Box
3. One (1), 1421 – Generation/NUG/PJM/IPP Metering Panel
4. One (1), 4524 – Revenue Metering C.T. M.U. Box
5. One (1), 4531 – Generator Interconnect CCVT Potential M.U. Box
6. One (1), 1611 – 28” SEL-451 PMU Panel w/SEL 735/735
7. Two (2), 4541 - Control Cable M.U. Box

2. Transmission Line – Upgrades
PJM Network Upgrade #n5478 - Re-arrange Line #80 to loop into and out of the new three
breaker Harts Mill 115 kV switching station at structure 80/114 on the Anaconda - Hathway
115kV line #80. The line connection will require the installation of (2) backbone structure. Two
Static pole structures will also be installed for the protection of the substation equipment.

ESTIMATE INCLUDES COST FOR THE FOLLOWING FACILITIES:

1. Two (2) 115kV Standard Backbone Structures
2. One (1) 115kV DC Engineered Monopole w/foundation
3. Install (1) 1-Phase FDE above Substation Wavetrap inside the fence at Anaconda
Substation
4. Install (2) 1- phase FDE above Substation Wavetraps inside the fence at Tarboro
Substation
5. Install approximately 0.33 miles of 7#7 ALW static wire.
6. Install approximately 0.07 miles of 3-Phased 1-636 ACSR (24/7) conductor.
7. Transfer (2) 3-phased conductors and (4) shield wire to new structure

3. New Substation/Switchyard Facilities
PJM Network Upgrade #n5476 - Build a three breaker Harts Mill 115 kV switching
station. The site is located along the ITO’s existing right of way for the Anaconda – Hathaway
115kV line #80. The work required is as follows:

Purchase and install the following:
   1. Approximately 300’ X 230’ site preparation and grading as required for installation of the
       switching station (by Sun Energy 1, LLC) not including any added land as required for
       SWM, etc
   2. Approximately 1060 linear FT of 5/8” Chain Link, 12 FT tall, perimeter fence around the
       station along with the security cameras and integrators (Design 4 Standard).
   3. Full substation ground grid as per engineering standards
   4. Two (2) 115 kV Light Duty, Single Circuit Backbones
   5. One (1) shield wire pole and two span of shield wires
   6. Three (3), 115kV, 3000A, 40 kA, SF6 Circuit Breakers
   7. Six (6), 115kV, 2000A Center Break Switches
   8. Six (6), 115kV, CCVT's, relay accuracy
   9. Two (2), 2000A, Vertically Mounted, Wave Traps along with two (2), Line Tuners
   10. Nine (9), 90kV MO, 74kV MCOV Station Class Arresters
   11. Four (4), 115kV, 100 KVA Power PT's for Station Service
   12. Two (2), 115kV, 2000A, 2-Pole Center Break Switches (for PVT’s)
   13. One (1), 24' x 40' Control Enclosure
   14. One (1), 135VDC, 577Ah Batteries and 50A Charger
   15. Oil Containment system for the 115kV PVT’s.
   16. Cable Trough, concrete w/cover, 2’ 6’’ wide, approximately 250 FT, with a 20 FT road
       crossing section.
   17. Steel structures as required including switch stands, bus supports, station service
       transformers, CCVT and wave trap supports
   18. Foundations as required including control house, equipment and bus support stands
   19. Conductors, connectors, conduits, control cables and grounding materials

Purchase and install relay material:
   1. Three (3), 1510 – 28” Dual SEL-351-7 Transmission Breaker w/ Reclosing Panel
   2. Three (3), 4510 - SEL-2411 Breaker Annunciator
   3. Two (2), 1320 – 28” Dual SEL-421-5 DCB Line Panel
   4. Two (2), 4506 – 3 Phase CCVT Potential M.U. Box
   5. One (1), 1603 – 28” SEL-451 Islanding Control Scheme Panel
   6. Two (2), 4000 – Station Service Potential M.U. Box
   7. Two (2), 4018 – 500A Station Service AC Distribution Panel
   8. Two (2), 4007 – 225A Outdoor Transmission Yard AC NQOD
   9. Two (2), 4019 – 225A Three Phase Throwover Switch
   10. Two (2), 4016 – 600A PVT Disconnect Switch
   11. One (1), 4153 – Wall Mount Station Battery Monitor
   12. One (1), 5612 - SEL-3530 Data Concentrator Panel
   13. One (1), 1255 – Station Annunciator Panel
   14. One (1), 5021 – SEL-2411 RTU Panel
   15. One (1), 5609 – Fiber Optic Management Panel
   16. Three (3), 4526_A – Circuit Breaker Fiber Optic M.U. Box
   17. One (1), 5202 – 26” APP 601 Digital Fault Recorder
   18. One (1), 5603 – Station Network Panel
   19. One (1), 5616 – Station Security Panel
   20. One (1), Telephone Interface Box

© PJM Interconnection 2018. All rights reserved.   6             Queue AB1-081 Anaconda – Heartsease 115kV

4. Upgrades to Substation / Switchyard Facilities

PJM Network Upgrade #n5477 - Remote protection and communication work. ITO
protection requirements to reliably interconnect the proposed generating facility with the
transmission system determined that work is required at Anaconda, Hathaway, Tar River, and
Tarboro 115kV substations. These costs include the following:

Anaconda 115 kV Substation
Project Summary
Installation of a 800A Wave Trap on Line 55 at Anaconda Substation.

Purchase and install:
1. Install one (1), 800A Vertically Mounted Wave Trap
2. Install any foundations, grounding, steel pipe stands, conductor and connectors as
necessary

Hathaway 115 kV Switching Station
Project Summary
Installation of a 2000A Wave Trap on Line 80 at Hathaway Substation.

Purchase and install:
1. Install one (1), 2000A Vertically Mounted Wave Trap
2. Install one (1), Line Tuning Box
3. Install any foundations, grounding, steel pipe stands, conductor and connectors as
necessary

Purchase and install relay material:
1. One (1), 1604 – 28” Transmission Islanding Transfer Trip Panel
2. One (1), CS-51C Transfer Trip Set & tuning units
3. One (1), CS-28A Carrier Blocking Set

Tar River 115 kV Substation
Project Summary
Installation of an 800A Wave Trap on the distribution transformer line tap from Line 55 at Tar
River Substation.

Purchase and install:
1. Install one (1), 800A Vertically Mounted Wave Trap
2. Install any foundations, grounding, steel pipe stands, conductor and connectors as
necessary

Tarboro 115 kV Substation
Project Summary
Installation of Wave Traps on Line 55 Terminal at Tarboro Substation. Due to space constraints
at the site, three individual wave traps will need to be installed to accommodate the new carrier
as required by SPE (what is SPE?) – one Wave Trap at the existing 115kV Capacitor Bank and
Transformer #3 Low Side junction, one Wave Trap at the Transformer #4 Low Side and Town of
Tarboro DP junction and one at the Distribution Transformer High Side tap. It will be necessary
to relocate the existing A Phase Line 55 CCVT to the new Transformer #3/115kV Capacitor
Bank junction Wave Trap installation.

Purchase and install:
1. Install two (2), 2000A Vertically Mounted Wave Traps
2. Install one (1), 800A Vertically Mounted Wave Trap
3. Install one (1), Line Tuning Box
4. Install any foundations, grounding, conduit, control cable, steel pipe stands, conductor and
connectors as necessary

Purchase and install relay material:
1. One (1), 4506 – 3 Phase CCVT Potential M.U. Box
2. One (1), 1604 – 28” Transmission Islanding Transfer Trip Panel
3. One (1), CS-51C Transfer Trip Set & tuning units
4. One (1), CS-28A Carrier Blocking Set

Direct Indirect
Work Description Labor Material Labor Material Total Cost

Anaconda $78,612 $14,622 $14,987 $1,994 $110,215
Hathaway $111,326 $75,379 $23,233 $10,779 $220,717
Tar River $75,291 $12,249 $15,392 $1,826 $104,758
Tarboro $203,573 $115,621 $39,714 $16,207 $375,115
Total Remote Relay Upgrades $468,802 $217,871 $93,326 $30,806 $810,805

5. Metering & Communications
PJM Requirements
The IC will be required to install equipment necessary to provide Revenue Metering (KWH,
KVARH) and real time data (KW, KVAR) for IC’s generating Resource. See PJM Manuals M-
01 and M-14D, and PJM Tariff Sections 24.1 and 24.2.

Meteorological Data Reporting Requirement
The solar generation facility shall provide the Transmission Provider with site-specific
meteorological data including:
 Temperature (degrees Fahrenheit)

 Atmospheric pressure (hectopascals)
 Irradiance
 Forced outage data

ITO Requirements
Metering and SCADA/Communication equipment must meet the requirements outlined in
section 3.1.6 Metering and Telecommunications of ITO’s Facility Interconnection Connection
Requirement NERC Standard FAC-001 which is publically available at www.dom.com.
At the IC’s expense, the ITO will supply and own at the Point of Interconnection bi-directional
revenue metering equipment that will provide the following data:
a. Hourly compensated MWh received from the Customer Facility to the ITO;
b. Hourly compensated MVARh received from the Customer Facility to the ITO;
c. Hourly compensated MWh delivered from the ITO to the Customer Facility; and
d. Hourly compensated MVARh delivered from the ITO to the Customer Facility.
The IC will supply and own metering equipment that will provide Instantaneous net MW and
MVar per unit values in accordance with PJM Manuals M-01 and M-14D, and Sections 8.1
through 8.5 of Appendix 2 to the ISA;

The IC will access revenue meter via wireless transceivers or fiber cabling to meter with RS-485
or Ethernet communication port for dial-up reads. IC must provide revenue and real time data to
PJM from Interconnection Customer Market Operations Center per “PJM Telemetry Data
Exchange Summary” document available at PJM.com.

6. Environmental, Real Estate and Permitting Issues
The IC would be responsible for the following expectations in the area of Environmental, Real
Estate and Permitting:
 Suitable Access Road from Substation to a North Carolina Maintained Roadway.
 Any additional land needed for Storm Water Management, Landscaping, and
Wetlands/Wetlands Mitigation.
 Conditional Use Permit for Substation.
 Any other Land/Permitting requirements required by the Substation.
ITO Real Estate Needs:
 The substation layout is complete and ITO requires a 300’x 230’ piece of property (title
in fee) to build the substation. The property includes the piece of property between the
substation and collector station for the strain bus.
o ITO requires ownership transfer of the substation site before they start
construction. Target for the deed by October 2020.
o The size of the station assumes ITO will not need a separate storm water
management system for the substation. If the county rules differently then the
ITO will need to revisit the land requirements.
 ITO will need a letter similar to the zoning letter from the county stating that if the solar
farm is retired and / or decommissioned the substation will remain.

Attachment 1.
                                                    Site Plan

© PJM Interconnection 2018. All rights reserved.       10          Queue AB1-081 Anaconda – Heartsease 115kV

Attachment 2.
                                                   Single Line

© PJM Interconnection 2018. All rights reserved.       11          Queue AB1-081 Anaconda – Heartsease 115kV

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