Abstract：Design principle and constitution of pitch system are analyzed in detail in this paper.MW-grade pitch system is designed based on kernel control algorithm of non liner PID algorithm,bus communication of Profibus bus and CAN bus,backup power of super capacitor. System operation model is divided into 5 modular for system software development. Research achievement is supplied on some wind field in our country. It is testified that pitch system position and speed precision demand complied with the requirements of wind turbine.
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2015, Vol. 16 
