Floating Lidar Measurements, IEA Wind RP 18 and the Future of Standards and Guidance for Lidar - Dr Peter Clive - Zenodo
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27 August 2019 Floating Lidar Measurements, IEA Wind RP 18 and the Dr Peter Clive Future of Standards and Guidance for Lidar Principal Wind Energy Consultant
“In the course of developing this recommended practice
document the authors are aware that this is a ‘stepping
stone’ on the way to a normative standard”
(IEA Wind RP 18 Floating Lidar Systems,
Section 9. Recommendations for Further Work)
2
Contents
• Industry adoption and experience of floating lidar
• Pre-normative guidance: Carbon Trust OWA and IEA Wind Task 32
• Context: the IEC 61400-50 series of standards
• Contents of standard
• Timeline
• Preparing for the future:
• Richer data sets mean better projects
• Supporting the deployment of floating wind turbines
3
Industry Adoption and Experience of Floating Lidar
Source: Carbon Trust OWA “Deployments of Floating LiDAR Systems” (2018) 4
Industry Adoption and Experience of Floating Lidar
Source: Carbon Trust OWA “Deployments of Floating LiDAR Systems” (2018) 5
Industry Adoption and Experience of Floating Lidar
Source: Carbon Trust OWA “Deployments of Floating LiDAR Systems” (2018) 6
Draft Areas for Lease based on Marine Scotland draft plan
• Marine Scotland have
released a draft Sectoral
Plan:
• Regions that are suitable
for lease (subject to
change)
• key constraints
• site characteristics
Map of Scottish sites identified in the Marine Scotland Scoping Study. Contains public sector information
licensed under the Open Government Licence v3.0. For licence information see
7
nationalarchives.gov.uk/doc/open-government-licence/version/3
Tha mi an dòchas gum bi crainn-ghaoithe air fleodradh agus stòr-lùth le chéile 'gan chur an gnìomh ri iar air Innse Gall luaithe an àite maille. Bhiodh math aig eaconomachd ionadail.
Navy opposed to Southern California OSW due to congestion Shipping lanes and heavy naval operations
Pre-normative guidance:
Carbon Trust OWA and IEA Wind Task 32
• OWA Recommended Practices for Floating LiDAR Systems (2016)
• IEA Wind RP 18 Floating Lidar Systems (2017)
• OWA Roadmap for the Commercial Acceptance of Floating LiDAR Technology
• Version 1.0 2013, Version 2.0 2018
• Three stages of technological maturity
• Baseline: lidar "proven" onshore
• Pre-commercial: sea trial, acceptance criteria met
• Commercial: experience represents full range of operational conditions
• Subjective versus objective criteria
• Qualitative "confidence" versus quantitative "uncertainty" and KPIs
• Replication of TRL scheme
14Context: the IEC 61400-50 series of standards
• Reorganization of wind measurement standards underway
• Disaggregation of IEC 61400-12-1:2017
• Separation of measurement methods, e.g. met masts, remote sensing, from
data requirements of use cases, e.g. noise impact assessment, power
performance testing, wind resource and site suitability assessment, etc.
• Shorter, more versatile, more easily maintained documentation
• IEC 61400-50-1 - Met masts (c.f. Annexes F, G)
• IEC 61400-50-2 - Ground based lidar (c.f. Annex L)
• IEC 61400-50-3 - Nacelle mounted lidar (in progress)
• IEC TS 61400-50-4 - Floating lidar (present proposal)
15Context: the IEC 61400-50 series of standards
- Contents of the proposed standard
• Follow the pattern, mutatis mutandis, established by 50-2 and 50-3
• Adopt & develop relevant content from pre-normative guidance
• Introduction & scope, normative references, terms & definitions, symbols & units
• Minimal functional requirements, ancillary equipment & associated guidance
• Calibration & uncertainty of intermediate values
• (N.B. potential incorporation of proposals from Carbon Trust OWA Lidar
Uncertainty Standard Review (2018) into uncertainty calculations)
• Classification & uncertainty of final values
• (N.B. potential extension of "evidence base" scheme that elaborates on progress
in IEC 61400-50-3, Carbon Trust OWA Roadmap, & aligns with TRL)
• Preparation for measurement campaign, measurement procedure, & reporting
16Context: the IEC 61400-50 series of standards
- Proposed timeline
TS: publication to align with stability of
related standards to allow co-ordination
Call for experts of all lidar guidance
M1: Scope M2: Draft M3: CD(V)
Q1 2021
Q2 2019 Q3 2019 Q4 2019 Q1 2020 Q2 2020 Q3 2020 Q4 2020
17Strategic outlook: preparing for the future
• Anticipated increase in deployment of offshore wind
• In particular floating wind, where floating lidar offers the only source of pre-
construction site measurements
• Synchronisation of lidar standards around 2021
• Opportunity to co-ordinate next editions to reflect full lidar capabilities rather than
restriction to the emulation of met masts: richer datasets, better projects
• Emerging post-subsidy environment will require proper application of full
capabilities to deliver realistic energy assessments that identify all
opportunities for optimisation and support through-life management
• Emerging methodologies, e.g. RECAST, that integrate lidar with models in a way
that allows alignment of project metrics at all phases with measurement
methods compatible with all phases
18Conclusions
• Industry is using floating lidar and would benefit from standardisation
• Mature and stable pre-normative guidance is available as a basis
• A community of experts and practitioners with project experience exists
• The technology is likely to be the principle source of pre-construction site data
for the next generation of offshore wind projects, in particular floating wind far
offshore
• There is an opportunity to align different measurement standards arising in
approximately 2021 which provides a broader context
• There is an opportunity to provide guidance from 2021 onwards that supports
the exploitation of the full capabilities of available measurement technologies
1927 August 2019 Peter Clive +44 1737-856-383 +44 7739-909-040 https://www.linkedin.com/in/pclive/ CliveP@bv.com
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