逆变器并联系统开关环流的研究  

Research on the Switched-circulating-current of Parallell Inverter System

作　　者：董亮 张尧[2] 温传新 赵晓冬 

机构地区：[1]国网智能电网研究院,江苏南京210003 [2]浙江大学,电气工程学院,浙江杭州310027

出　　处：《电力电子技术》2012年第10期33-35,共3页Power Electronics

基　　金：国家重大科技专项(2011ZX02503-006;2011ZX-02603-005)~~

摘　　要：多逆变器构成的微电网在孤岛运行时,逆变器并联系统中会存在环流问题。对现有环流问题进行扩展分析,提出开关环流的概念,并基于开关器件级的电路模型,研究电路参数与开关环流之间的关系,提出能够较好抑制开关环流的电路参数的设计原则。通过仿真和实验明确了所提出的开关环流概念的理论和实际意义,并验证了对其分析以及抑制的电路参数设计方法的有效性和可行性。There are circulating currents among the parallelled inverters in islanded microgrid.Based on the exsisting research results, this paper proposes the concept of switched-circulating-current and sets up a integrated and accurate model of the parallel system.Based on the model,the relationships between the circuit parameters and switched-circu- lating-current are investigated, the switched-circulating-current of the parallel inverter system is analyzed in detail and a favorable design guideline to restrain the switched-circulating-current is presented.Simulation and experimental re- sults clarify the significance of concept of switched-circulating-current and prove the correction of theoretical analyses.

关 键 词：微电网 逆变器并联 开关环流 纹波 

分 类 号：V242.31[航空宇航科学与技术—飞行器设计]