摘要：与传统的三相星形绕组永磁同步发电机（PMSG）PWM整流系统相比，双PWM整流器控制的开绕组PMSG系统具有容错性高，拓扑结构灵活等特点。但当双整流器共用一个直流母线时，产生了一个零序电流通路，因此在采用空间电压矢量（SVPWM）控制时算法中存在的零序电压分量就会在通路中产生零序电流。对于永磁电机而言，电机反电势中的三次谐波分量也会产生一个相应的零序电流。因此，为了最大程度地减小电机绕组内的零序电流，本文提出采用零序电流调节器，可使电机相电流波形趋近正弦，整流后得到的直流母线电压稳定且纹波小。仿真和实验结果验证了该系统的有效性。
关键词：开绕组永磁同步发电机；双PWM整流器；共用直流母线；零序电流调节器

Abstract: Compared with the traditional Yconnected winding permanent magnet synchronous generator (PMSG) PWM rectification system, the dualrectifier controlled openwinding PMSG system has the advantages of higher fault tolerance and more flexible topology. When the dualrectifier uses a common DC bus, a zerosequence current path is formed. When the dualrectifier system uses the space vector pulse width modulation (SVPWM) control, the algorithm can produce a zerosequence voltage which leads to the zerosequence current in the path. The third harmonic back EMF that may exist in the PMSG will also produce a corresponding zerosequence current. In order to suppress the zerosequence current in the stator wingdings, a zerosequence current regulator was proposed in this paper, which made the phase current more sinusoidal, and stabilized the rectified DC bus voltage with less ripple. Both simulation and experimental results validate the effectiveness of the proposed system.
Key words: openwinding permanent magnet synchronous generator；dual PWM rectifiers；common DC bus；zerosequence current regulator