PSS control and simulation of asynchronous wind generator connected into power grid

摘要

A power system stabilizing technology is introduced into the wind turbine with the asynchronous induction generator, by bringing the power system stabilizer (PSS) into the pitch control system of asynchronous generator. During the low-frequency power oscilliation of a power system, a damping active power is injected into the network from the asynchronous induction generator via bringing the PSS into the pitch control system of asynchronous generator. Based on the IEEE two-area system, adding a wind farm, the effect of the PSS is verified. Through the power flow calculation, building the corresponding simulation model in MatlabSimulink, the phase-frequency characteristics of the wind turbine at different wind speed is measured, and the oscillation modes existing in the system are analyzed. According to the phase-frequency characteristics, the parameters of PSS are optimized, thus obtaining a generic parameter at the high and low speed. The simulation results show that, the PSS with the settings has good inhibitory actions to low-frequency oscillations under different operation modes.