Optimization of Six-phase PMSG Rectification System in Wind Power System

Wind power has become one of the key directions in the application of new energy because of its environmental friendly, renewable characteristics. Due to the instability of the wind, all wind-power-PMSG need to link with a rectification device before the electrical power is output to the power grid. In order to increase the power of PMSG and improve the power quality under different wind speed, this paper studies the optimization problem of the six-phase PMSG rectification system comparing with the three-phase one. Difference of Six-phase PMSG structure and the three-phase bridge rectifier device connections will result in different six-phase rectification PMSG system performance. Simulation analysis found that a wind power generation system with a six-phase double Y-30°-deflected PMSG and three-phase bridge rectifier series has the best behaviour of DC output power quantity and harmonic quality within a big range of wind speed