Research on stability improvement of hydroelectric system using governor fuzzy power system stabilizer

The conventional hydro-generator governor can not satisfactorily control hydro-generator stability because of the hydraulic system's water-hammer effect and intense nonlinear characteristic.The design principle of FGPSS(Fuzzy Governor Power System Stabilizer)for hydro-generator unit is described.The simulation model is established with Simulink based on the elastic water hammer mode of hydraulic system and nonlinear model of synchronous generator.The control results are compared among PID+FGPSS,PID and PID+Conventional GPSS,which indicate that FGPSS can improve hydroelectric system stability and has strong robustness.