Slip compensation for electrical pitch system of wind turbine

SUN Yun
（Datang Shandong Clean Energy Development Co., Ltd., Qingdao 266061，China）

Abstract： Aiming at lower emergency stop speed of the pitch system with heavy load because of the traditional V/F control method when the blades of wind turbine system are moving to feathering position， a method of the slip compensation for electrical pitch system was introduced to attain higher emergency stop speed. After the analysis of the relationship between pitch system emergency stop speed and voltage frequency，the experiments were carried out on the electric pitch control platform and the experimental results were given. The results indicate that the slip compensation for electrical pitch system can effectively increase emergency stop speed in the pitch system for wind turbine.
Key words： wind power generation system； electrical pitch system; slip compensation