六相永磁同步发电机系统的零序电流抑制策略  

Zero-Sequence Current Suppression Strategy for Six-Phase PMSG System

作　　者：施国栋 孙磊 王侯清 何坚强 张春富[1] SHI Guodong;SUN Lei;WANG Houqing;HE Jianqiang;ZHANG Chunfu(Yancheng Institute of Technology,Yancheng 224051,China;Department of Precision Instruments,Tsinghua University,Beijing 100084,China)

机构地区：[1]盐城工学院,盐城224051 [2]清华大学精密仪器系,北京100084

出　　处：《微特电机》2022年第7期53-57,共5页Small & Special Electrical Machines

摘　　要：针对共直流母线开绕组永磁同步发电机(OW-PMSG)系统在传统空间矢量调制策略下存在的零序电流干扰不足,通过分析共直流母线开绕组电机系统中零序电流产生原因,提出一种应用于六相OW-PMSG系统的零序电流抑制的控制策略。为有效抑制零序电流,引入比例谐振控制器控制变流器产生共模电压,以抵消反电动势三次谐波分量。为有效抑制由定子结构带来的5次、7次谐波,重新选择矢量,并按照计算出的比例关系分配矢量作用时间。对比分析传统最大四矢量控制策略和改进的零序电流抑制策略的仿真结果,验证了该方案的可行性。Aiming at the interference of zero sequence current(ZSC)in traditional space vector modulation strategy for six phase open-end winding permanent magnet synchronous generator(OW-PMSG)system,on the basis of analyzing the law of ZSC,an improved modulation strategy to reduce ZSC was proposed.In order to suppress ZSC effectively,a proportional resonance controller was introduced to control the converter to generate common model voltage to offset the third harmonic voltage.In order to effectively suppress the 5th and 7th harmonics brought by the winding structure,the vector was re-selected and the time of vector action was allocated according to the calculated proportional relation.The simulation results of the traditional maximum four vector control strategy and the improved zero-sequence current suppression strategy were compared to verify the feasibility of the scheme.

关 键 词：开绕组永磁同步发电机 共模电压 零序电流 比例谐振控制 

分 类 号：TM351[电气工程—电机]