Abstract: Taking the megawatt level doublyfed wind power generation unit as control object, based on the embedded computer technology, the network technology and the graph configuration technology, the controller of master control system suitable to wind power generation unit had been developed. Aiming at the requirement of safety chain system specified in relevant wind turbine controller standard, the safety chain node of the controller had been designed, including the hardware circuit design and the software logic design of the safety chain node. By means of relevant configuration and modification, the controller can be used widely in the control systems of various types of wind turbines.

Key words: wind power generation unit, master control system, graphic configuration, controller, safety chain node