Dynamic stability of the power system has become a key issue of modern power system engineering. Synchronous generator automatic voltage regulator (AVR) for the stability of the power system plays an important role. To make AVR system to adapt to a more complex work environment, and enhance AVR ability to resist to outside interference and to follow the input signal fast, a composite control strategy including CMAC, strategy points separate PID controller and Kalman filter is proposed. Through the simulation of a generator AVR model in a Hydropower Station in Yunnan Province, it is found that:the control strategy for a square wave input signal has a strong ability to follow the system response speed, adjusting time is short, and the control channel and the measurement channel interference has a strong inhibitory effect, which fully verify the feasibility of the control strategy and contribute to the stability of the power system.