Research on the sub-synchronous oscillation in wind power connected to series compensated power system and its influencing factors

Abstract

When wind farms, which is based on double fed induction generator (DFIG), are connected to the series compensation power system, the phenomenon of sub-synchronous oscillation (SSO) may occur. In order to study the sub-synchronous oscillation in wind power connected to series compensated power system and its influencing factors, we used RT-LAB to establish a simulation model concerning wind power connected to series-compensation power system. This model take a wind power connected to series compensation power system in north China as prototype. All influence factors of wind power SSO are simulated and analyzed by using time domain analysis method. The simulation results show that the effects of wind speed, series compensation degree and proportional control coefficient of rotor side converter (RSC) are most obvious.