1. PCWG 9 th Meeting: 12 December 2014 - Glasgow Introduction, Agenda and Review of Actions

2. Motivation: to agree the 2015 roadmap for the PCWG. Morning Session: 09:30 – 13:00 09:30 - 09:40 “Welcome”, Ralph Torr (ORE Catapult – Event Host) 09:40 - 10:00 PCWG Status & Action Update – Peter Stuart (RES) 10:00 - 10:30 Round Robin 4 Results Overview and Discussion 10:30 - 11:30 2015 Road Map Discussion (All): Discussion of proposed PCWG data sharing initiative. Survey results Presentation of draft roadmap Group Exercise 11.30 – 11.45 Coffee Break 11:45 - 13:00 Road Map Discussion Continue (All) 13.00 – 14.00 Lunch

3. 14:00 - 15:00 Afternoon Presentations Session Part 1 14:00 – 14:15 Richard Whiting DNV GL: “Modelling Type B effects in the 4 th Quadrant using Bladed) 14:15 – 14:30 Stuart Baylis, Prevailing “A Novel Method for Improving Turbine Performance Predictions by Considering the Frequency Distribution of Shear” 14:30 – 14:45 “Redefinition of Power Curves: Electric vs. Kinetic Power”, Erik Tüxen DNV GL. 14:45 – 15:00 Presentation Discussion 15:15 - 16:00 Afternoon Presentations Session Part 2: LiDARs 15:15 – 15:30 Lidar observations of the compression zone and capabilities as a turbulence instrument”, Peter Clive Sgurr 15:30 – 15:45 Michael Harris, ZephIR, "ANALYSIS OF REAL WORLD TURBINE PERFORMANCE USING FORWARD-FACING NACELLE LIDAR". 15:45 – 16:00 Presentation Discussion

4. Discussion Session: 16.00 – 16.45 Finalisation of turbulence correction consensus analysis and associated documentation. Review of Proposed Round Robin 5: “Power Deviation Matrices” Afternoon Wrap Up: 16.45 – 17.00 Venue for next meeting Public distribution of presentations and minutes

5. Review of Previous Actions

6. Develop glossary of terms. Perform round robin exercise for Veer term of REWS method using Dataset 3. Improve consensus analysis for turbulence renormalisation method making calculation steps clearer e.g. flow charts. Publically distribute Inner-Outer range concept document. Identify and distribute additional validation datasets: Galion dataset from SSE Dedicate portion of next meeting to Type B effects. Actions from Dec 2013 Meeting

7. Complete Rotor Equivalent Wind Speed (Veer) Exercise (revised deadline 27 th of June) Develop Guideline Document on the Presentation of Power Curve Information Develop Guideline Document on the Application of the Turbulence Renormalisation Method Engage with research institutions to test Type B hypotheses using ‘open-source’ rotors. Develop proof of concept for the ‘Black Box Model’ approach. Release python implementation of consensus analysis as open source. Investigate the possibility of hosting a PCWG event in the US. Publicise meeting via AWEA Release 4th RR exercise 1st April 2014

8. Improve documentation of consensus analysis of turbulence correction (flow charts) Add user interface to Open Source Tool Publish Road Map for PCWG 2015 activities. Complete 4th Round Robin in advance of December Meeting Arrange a Round Robin on Power Deviation Matrix Method Arrange a Round Robin on Rotor Equivalent Wind Speed considering inflow. Explore enhanced data sharing exercise (possibly utilising open source tool). Revisit proposal to use Open Source Rotor to investigate “Type B” performance effects. September 2014

9. The members present agreed that the PCWG should continue its activities for 2015. A roadmap will be prepared detailing the planned objectives and activities for 2015. The IEC 61400-12-1 committee and PCWG should aim to hold a further joint meeting in 2015 (timed with an existing 61400-12-1 meeting to minimise travel). A manufacturer PCWG member will investigate supplying climate/site specific power curves for forthcoming the round robin. PCWG to add action to 2015 roadmap to develop data specification for climate/site specific power curves. This should detail both the input data required by a manufacturer to generate a site specific power curve and the output data required by a developer/consultant in order to do their analysis. PCWG to explore establishing a named liaison between the PCWG and the IEC 61400- 15 (Resource Assessment) standard committee. PCWG to explore preparing a document that would outline the benefits of manufacturers supplying power deviation matrices on an informative basis. PCWG to conduct round robin on application of power deviation method. PCWG members to explore release of additional datasets to the PCWG. PCWG to explore adding IEC uncertainty calculation to PCWG open source tool. October Meeting Key Outcomes