Global Leader in International Renewable Industry News

posted in:

First Wind uses Wind Iris Lidar to correct yaw error and improve energy production

Friday, Dec 06, 2013

First Wind, an independent U.S.-based renewable energy company, has purchased a Wind Iris Lidar to optimize the performance of its wind turbines. The decision resulted from a successful field trial that used data from the nacelle-mounted Lidar to correct yaw error and increase total energy production.

First Wind wanted to improve the yaw alignment of an underperforming wind turbine to maximize its energy capture. Analysis of the SCADA data—including measurements from a nearby met mast and the vane measurement from the wind turbine—was not enough to determine the correction needed. Therefore, the company decided to test a Wind Iris on the turbine.

The Wind Iris collected wind speed and direction data ahead of the turbine for 30 days. Analysis showed an average yaw error of seven degrees. A correction factor was then applied to the yaw measurement and 15 additional days of measurement using the Wind Iris revealed that the yaw error had been eliminated.

“We used the Wind Iris to determine whether there was yaw misalignment of one of our utility-scale wind turbines,” said Cegeon Chan, wind resource manager at First Wind. “By detecting and accurately quantifying the yaw misalignment, we were able to correct the error and gain significant AEP improvement. Based on this evaluation, we decided to purchase a Wind Iris to optimize more turbines in our fleet.”

By eliminating the yaw error, the annual energy production (AEP) of the wind turbine increased by 1.8 percent. This was calculated with a power curve estimation model using Wind Iris data, and it was also independently verified by comparing the relative increase in turbine production with nearby turbines that had not been optimized. While project-specific revenue impacts for this case are not available, increasing the AEP of 20 2MW turbines by 1.8 percent while selling power for $60/MW-hr would have a $155,340 benefit.

Wind Iris is manufactured by Avent Lidar Technology, a joint venture between U.S.-based Renewable NRG Systems and France-based Leosphere. The first Lidar dedicated to turbine performance evaluation, it uses pulsed Lidar technology to measure horizontal wind speed and direction at distances of 40 to 400 meters upwind of the turbine. It has been specifically designed for repeat installations, providing the ability to rapidly optimize a wind farm.

Source: First Wind

posted in:

Other Renewable News

SPI Solar announces amendment to agreement for Mountain Creek project 24-04-2014
Accenture to help Azure Power expand its solar generation business 24-04-2014
EPIA presents the Global Market Outlook for Photovoltaics 2014-2018 at Intersolar Europe 24-04-2014
Avianca Brasil and Byogy Renewables forge initiative to drive the global approval of Alcohol-to-Jet (ATJ) renewable jet fuel 24-04-2014
Intersolar North America strengthens focus on growing energy storage market 23-04-2014
GDF SUEZ Energy Resources NA again donates renewable energy certificates to the Houston Museum of Natural Science in Honor of Earth Day 23-04-2014
3M celebrates 10-year record of EPA ENERGY STAR sustained excellence award 23-04-2014
SolarWorld powers spread of grass-roots community solar purchasing from coast to coast 23-04-2014
Canadian Solar to supply 43MW of solar modules in Japan 23-04-2014
Nice-Pak products and PDI complete largest Rooftop solar array in Rockland County 22-04-2014