Abstract: Depth of AGC load process,the coal mill pulverizing system for thermal power unit startup and shutdown or tripping disturbance conditions,such as led directly to the main steam pressure and main steam temperature of the main parameters, such as severe changes, seriously affected the quality of AGC regulation. To solve this problem, this paper puts forward the fuel quantity to override control and a wind pressure automatic correction of double anti-interference control strategy. And apply in depth of AGC load of a 350 mw supercritical unit of the coal pulverizing system control,operation results show that the control strategy can not only steady disturbance conditions of fuel quantity,and can keep the average output of wind pressure with a mill dynamic matching relation,at the same time, which can effectively overcome the disturbance of the coal pulverizing system, ensure the steady performance of main parameter and the AGC control quality

Key words: AGC, Disturbed, override, correction, anti-interference, matching, performance