Development and prospects of excitation control methods for synchronous generator

The development stages of excitation control are linear single-variable control,linear multivariable control,nonlinear multivariable control and intelligent control.The linear multi-variable excitation control are forced control,PID+PSS control and linear optimal control;the nonlinear multivariable excitation control are robust control,variable structure control,adaptive control,internal model control,predict control,gray control,ADRC control,Lyapunov control,back-stepping control,passive control,Hamilton control and feedback linearization control;the intelligent excitation control are fuzzy control,neural network control,support vector machine control,expert control,learning control,genetic control and fuzzy neural control.The history and current situation of excitation control development are summarized,these control methods are classified according to the development of control theory,their principles,advantages and disadvantages are analyzed,the coordination between excitation control and other controls are explained,and the main problems and its development trend are pointed out.