逆变器并联系统开关环流的建模和分析  

Modeling and Analysis of Switching Frequency Circulating Currents in Parallel Inverter Systems

作　　者：马皓[1] 林钊[1] 张宁[1] 董亮 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]南瑞集团公司,江苏省南京市211106

出　　处：《中国电机工程学报》2015年第22期5823-5831,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51177149);高等学校博士学科点专项科研基金资助项目(20130101110108)~~

摘　　要：多逆变器并联系统中往往会存在环流,包括直流环流、工频环流以及开关频率环流。目前提出的环流分析和环流抑制的方法大部分都是针对直流、工频及其谐波环流的。而对于开关频率环流,并没有定量地分析开关环流与电路参数之间的关系。基于开关器件的开通和关断过程,该文提出了一种由于器件开关状态不同步而产生的开关频率环流的数学模型。另外,该文还详细研究和分析了开关环流与电路参数之间的定量关系。基于分析结果,进一步提出了能够较好地抑制开关环流的电路参数设计原则。实验结果很好地验证了所提出的数学模型的准确性和电路参数设计原则的有效性。There are circulating currents among the parallel inverters, including dc, fundamental and switching frequency circulating currents. Analysis and suppression methods currently proposed primarily focus on dc and fundamental circulating currents. However, the relationship between the switching frequency circulating current and circuit parameters has not been analyzed quantitatively so far. Based on the switching process of devices, a mathematical model of switching frequency circulating currents generated by asynchronous switching states is proposed in this paper. Moreover, the quantitative relationships between the switching frequency circulating current and the circuit parameters are investigated and analyzed in detail. Based on the analytical results, favorable design guidelines to restrain the switching frequency circulating currents are further presented. The experimental results perfectly validate the accuracy of the proposed mathematical model and the effectiveness of the design guidelines.

关 键 词：开关频率环流 三相逆变器并联系统 电路参数 设计原则 

分 类 号：TM464[电气工程—电器]