Welcome to Task 16 Summary Page

Wind Turbine Round Robin Test Program

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Operating Agent Representative:
Mr. H. Link
National Renewable
Energy Laboratory
1617 Cole Boulevard
Golden, CO 80401, United States
Tele: +1 303 384 6912
Fax:+1 303 384 6999
Email: H. Link

Final Report http://www.nrel.gov/docs/fy04osti/36238.pdf

The objectives of this program were to validate wind turbine testing procedures, analyze and resolve sources of discrepancies, and to improve the testing methods and procedures. The participants were:

Risø Test Station for Wind Turbines, Denmark
Center for Renewable Energy Sources (CRES), Greece
Atlantic Wind Test Site (AWTS), Canada
National Renewable Energy Laboratory (NREL),
United States of America

The Operating Agent representative was Hal Link at the National Renewable Energy Laboratory (NREL) in the United States.

A series of round robin comparison tests at participating national laboratories were suggested as a means of validating test procedures and establishing reciprocity between different certification testing laboratories. All participating laboratories tested identical machines at their own facilities, using comparable test instrumentation and data acquisition equipment. Discrepancies in the test data were resolved and served as the basis for improvements in testing procedures and calibration methods. This effort also served as justification for mutual recognition of foreign certification. After the kickoff meeting, in April 1996, participants began detailed preparations for testing. These included drafting of test plans, anemometer wind tunnel calibrations, and site calibration measurements.

Wind tunnel calibrations were conducted in cooperation with a European Wind Turbine Standards program, MEASNET, in which anemometers from eight countries are being calibrated in ten wind tunnels. Final calibrations have been completed. Annex participants agreed to conduct a follow-on calibration of anemometers at CRES. These tests were complete in March 1999 and results were presented at the European Wind Energy Conference in Nice.

NREL and Risø completed site calibration measurements, which quantify wind speed differences between the anemometer tower and the wind turbine.

The windturbine selected for testing was an AOC 15/50, 50 kW free-yaw turbine, that is relatively easy to transport and install. Participants will completed tests, one at Canada's AWTS, one at the United States' NREL, and one at two test stations in Europe. NREL has also completed noise, power performance, and structural loads testing of their turbine. AWTS completed power performance and loads testing in spring 2000.

The third turbine was shipped to Denmark and began operation at Risø in early December 1997. Risø completed power performance and loads tests in June 1998.

The final report was completed in 2004.