Power Curve Working Group

During the EWEA workshop on the Analysis of Operating Wind Farms (Lyon, France – 2-3 July 2012) it became clear that the impact of ‘non-standard’ inflow conditions on wind turbine power curves is a key issue facing the wind industry today.

A follow up activity of the workshop was the formation of a working group on the impact of ‘non-standard’ inflow conditions on power curves. The working group aims to facilitate stakeholder collaboration in order to acknowledge, address and ultimately resolve this question.

The group agreed that the EWEA Resource Assessment Technology Workshop (Dublin, 25-26 June 2013) would be a good forum for the working group to share the outcomes of this discussion with the wider industry and furthermore to exchange information on the efficacy of various power function adjustment models.

The working group was formed by a group of companies with a particular interest in this topic following the Lyon workshop. While EWEA is not actively participating in this working group, EWEA is hosting this information provided below following a request by the working group members.

For any questions regarding the Power Curve Working Group and the information provided below, please contact Peter Stuart, RES Ltd: peter.stuart@res-ltd.com

Documentation from the Power Curve Working Group kick-off meeting
4 December 2012, London, UK

Memorandum of Understanding and Minutes (PDF)
Agenda (PDF)
Why are we here? (PDF) Mike Anderson, RES Ltd., UK
What are the issues? (PDF) Daniel Stevens, SSE Renewables, UK
What are the mechanisms? (PDF) Michael Brower, AWS TruePower, USA
How to improve yield? (PDF) Andrew Tindal, GL Garrad Hassan, UK
Influence of Turbine Design Choices (PDF) Tomas Blodau, REpower, Germany
Modelling Impact of Non-Standard Conditions (PDF) Axel Albers, Deutsche Windguard, Germany
Power Curves for Different Ambient Conditions (PDF) Henk-Jan Kooijman, GE, The Netherlands
Experience of Siemens (PDF) Ioannis Antoniou, Siemens, Danmark
Discussion Points (PDF) Patrick Moriarty, NREL, USA
The Working Group’s Relationship to IEC (PDF) Alan Derrick, RES Ltd., UK

Documentation from second meeting of the Power Curve Working Group
12 March 2013, Remisen Brande, Denmark

Introduction (PDF)Peter Stuart (RES)

Agenda (PDF)
Minutes (PDF)
Power Curve Working Group Roadmap (PDF)
Siemens Experience of Rotor Average Wind Speed for Power Performance (PDF) Ioannis Antoniou (SWP)
Observed Performance in High Shear and Turbulence (PDF) Daniel Stevens (SSE)
Rotor Equivalent Wind Speed for Power Performance Measurement and AEP Estimate (PDF) Rozenn Wagner (DTU Wind)
Use of 5 Distinct Power Curves as a Function of Shear and Turbulence in Time-Series Energy Capture Calculations (PDF) Dan Bernadett (AWS TruePower)
Integrating Corrections into the Resource Assessment Process (PDF) Andrew Tindal (GLGH)
Experience of Rotor Averaged Power Curve Measurements in Cold Climates (PDF) Alan Derrick (RES)
Using Machine Learning To Create Turbine Performance Models (PDF) Andy Clifton, Senior Engineer (NREL – National Wind Technology Center)
Dynamic Power Curves and the LLNL Wind Power Program (PDF) Wayne Miller (Lawrence Livermore National Laboratory)
Roadmap for Industry to More Accurately Predict the Performance of Wind Turbines (PDF) Ralph Torr (Sgurr)
10 Measurements as a Basis for Extended use of Standard Power Curves Tomas Blodau (REPower)
Resource Assessment Methods Incorporating Rotor Equivalent Wind Speed, Density and Turbulence on a Time Step Basis (PDF) Anna Marsh (DNV KEMA)
Proposed Round Robin Dataset (PDF) Peter Stuart (RES)