T型三电平逆变器的共模干扰机理研究  

Study on common mode interference mechanism in T-type three-level inverters

作　　者：孙凯[1] 王全东[2] 李方正[2] 孟宪波[2] 

机构地区：[1]电力系统及发电设备安全控制和仿真国家重点实验室,清华大学电机系,北京100084 [2]装甲兵工程学院控制工程系,北京100072

出　　处：《电工电能新技术》2016年第3期1-7,共7页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金资助项目(51177083)

摘　　要：通过对T型三电平逆变器拓扑结构和工作模态的分析,得出逆变器共模电压的主要产生原因,推导了传统正弦PWM控制下共模电压的傅立叶表达式,并分析了其谐波成分。提出了T型三电平逆变器的共模传导电磁干扰高频等效电路模型,将基于该模型的共模电流频谱仿真结果和在T型三电平逆变器实验样机上获取的实测结果进行了对比分析,二者相互吻合,验证了本文提出的高频等效电路模型。本文的研究成果为T型三电平逆变器的共模电磁干扰抑制提供了重要的基础。The topology and operation modes of the T-type three-level inverter are analyzed to figure out the main causes for common mode（ CM） voltages. The Fourier expression of the common mode voltage under traditional sinusoidal pulse width modulation（ SPWM） is deduced for harmonics analysis. A high frequency equivalent circuit of T-type three-level inverters for the common mode interference analysis is proposed. The simulation results with the proposed model coincide with the experiments results on the experimental prototype very well,which shows that the model is effective with acceptable accuracy. This study provides an important basis on CM interference suppression for T-type three-level inverters.

关 键 词：T型逆变器 共模干扰 共模电压 高频等效模型 

分 类 号：TM464[电气工程—电器]