The operation of the"Two Rules"of Northeast Power Grid puts forward higher requirements for the adjustment quality indicators of thermal power units,and participates in the assessment and compensation of the power grid,and the control index of a power plant in Jilin Province is far lower than the assessment index.Therefore,by means of coordinated optimization and operation adjustment of the unit AGC under changing working conditions,the AGC function is more perfect and the parameter indicators are greatly improved under the premise of ensuring the stability of the unit parame-ters,meeting the requirements of the two rules.