DESIGN OF YAW CONTROL SYSTEM OF MW WIND-MILL GENERATORS

In order to run in a very large wind speed range,to improve energy efficiency,play wind power generators performance betterly,MW wind-mill generators all using the yaw control.The yaw control system is the part of the electric control system.The paper presents the function of the yaw control system in mw wind generators and its structure,on the basis of this,the paper mainly describes how to realize automatic calibration in the yaw control system,fault alarm,and how to prevent major accident happen.This system uses s7-300 series of plc control system of siemens company as the control system,with high stability and reliability.the system′s every function works well,and the devices operate steadily since system run into operation,so it has reached the design requirement compeletely.