用于三相级联STATCOM的电压前馈空间矢量调制策略  

Voltage Feedforward Space Vector Modulation Strategy for Three-Phase Cascaded STATCOM

作　　者：余恒洁 翟少磊 陈江洪 曹敏 朱梦梦 柳慧梅 熊兰[4] YU Hengjie;ZHAI Shaolei;CHEN Jianghong;CAO Min;ZHU Mengmeng;LIU Huimei;XIONG Lan(Yunnan Power Grid Co., Ltd., Kunming 650000, Yunnan, China;Electric Power Research Institute of Yunnan Power Grid Co Ltd., Kunming 650000, Yunnan, China;Wuhan Pan Electric Technology Co., Ltd., Wuhan 430058, Hubei, China;Hubei Collaborative Innovation Center for High-Efficiency Utilization of Solar Energy, Hubei University of Technology, Wuhan 430068, Hubei, China)

机构地区：[1]云南电网有限责任公司,云南昆明650000 [2]云南电网有限责任公司电力科学研究院,云南昆明650000 [3]武汉磐电科技有限公司,湖北武汉430058 [4]湖北工业大学太阳能高效利用湖北省协同创新中心,湖北武汉430068

出　　处：《电网与清洁能源》2018年第1期78-83,共6页Power System and Clean Energy

基　　金：国家自然科学基金项目(51507054);太阳能高效利用湖北省协同创新中心开放基金资助项目(HBSKFMS2014035)~~

摘　　要：针对H桥级联型STATCOM的直流电压平衡控制的问题,提出了一种适用于三相级联型STATCOM的基于直流电压前馈的空间矢量调制策略。该调制方法在输出电压矢量合成中根据各单元直流电压和输出电流的方向调整开关矢量组合。既能实现高质量的波形输出,又能自动抑制级联单元的直流电压不平衡,降低了控制器的算法复杂度;最后通过仿真验证了该策略的可行性。To solve the problem of DC voltage imbalance of H-bridge cascaded STATCOM, a space vector modulation strat- egy for three-phase cascaded STATCOM based on DC voltage feedforward is proposed in this paper. This modulation strategy proposed selects switching vector combinations according to the cell DC voltages and the direction of the output current to synthe- sis the required output voltage. This method not only obtains high quality output wave forms, but also automatically suppress- es the DC voltage imbalance, thus reduces the complexity of the controller algorithm. Finally, the simulation results verify the feasibility of the proposed strategy.

关 键 词：级联STATCOM 空间矢量调制 电压前馈 

分 类 号：TM743[电气工程—电力系统及自动化]