An Excitation Control Strategy of Synchronous Generator Based on Fuzzy PID

Aiming at the excitation control system model including dynamic, non-linear and complex problems, it is difficult to establish an accurate model. Then a fuzzy-PID control algorithm based on Mamdani fuzzy model is proposed by combining the fuzzy theory with the conventional PID control law. On the basis of establishing a simple model of excitation control system, the fuzzy Mamdani model is introduced. The rules modify the parameters of PID control, and use the fuzzy inference to convert the fuzzy set into the precise output value. The voltage control effects of two kinds of fuzzy models of PID excitation control system are compared through the simulation example of MATLAB. The research and analysis show that the new strategy has better voltage control effect than the conventional PID method, which realizes the optimal control of synchronous generator excitation system under multi-working conditions, and provides a new idea for the application of fuzzy PID control in large synchronous generator excitation control.