Study on Simulation of Grey Prediction PID Control on Excitation Control System

A simulation study of excitation control on synchronous generator has been conducted based on MATLAB.The study employs PARK model as the synchronous generator's model,which guarantees the nonnegative original data in grey prediction module and simplified the procedure of grey prediction.The problem of dealing with grey prediction module under steady state and selection of sample period of original data is discussed,avoiding the problem that grey prediction PID loses control under steady state.The simulation results show that grey prediction PID excitation control is better than general PID excitation control,because its extraordinary quantity and regulating time under different work conditions are both smaller and shorter.