Optimization of wind turbine unwind control based on wind speed forecasting

WANG Xin, WU Genyong, PAN Donghao, YING You

(State Key Laboratory of Wind Power System, Zhejiang Windey Co., Ltd., Hangzhou 310012, China)

Abstract: Aiming at existing problems on the wind turbine unwind control system, firstly the unwind control performance of the target wind farms was analyzed and the necessity of the research on unwind control scheme was put out. Then a ultrashortterm wind speed forecasting method based on PSOLSSVM model was proposed, the average wind speed in the future 30 minute was forecasted using a PSOLSSVM model. At last a unwind control optimization scheme based on the forecasting wind speed was proposed, and the unwind control schemes in the target wind farms were optimized. The results indicate that the experimental result shows that the PSOLSSVM model has a higher prediction accuracy than the LSSVM model, the proposed scheme can reduce the power loss causing by unwind and has good engineering application value.

Key words: wind turbine; unwind; ultra shortterm wind speed forecasting; PSO; LSSVM