一种差分对称型五电平逆变器拓扑及分析  

Topology and Analysis of a Differential Symmetrical Five-Level Inverter

作　　者：张少如[1,2,3] 刘洋 杜秀菊[1,2,3] 黄战平 贾谊堃[4] 王平军 张介禄[3] ZHANG Shaoru;LIU Yang;DU Xiuju;HUANG Zhanping;JIA Yikun;WANG Pingjun;ZHANG Jielu(Hebei Normal University,Shijiazhuang 050024,China;Hebei Provincial Key Laboratory of Information Fusion and Intelligent Control,Shijiazhuang 050024,China;Jiangsu Tailong Reducer Co.,Ltd.,Taizhou 225400,China;Hebei Science and Technology Engineering School,Baoding 071000,China)

机构地区：[1]河北师范大学,河北石家庄050024 [2]河北省信息融合与智能控制重点实验室,河北石家庄050024 [3]江苏泰隆减速机股份有限公司,江苏泰州225400 [4]河北科技工程学校,河北保定071000

出　　处：《电机与控制应用》2023年第8期52-59,共8页Electric machines & control application

基　　金：河北省重点研发计划项目(22352201D);河北师范大学科研基金资助项目(L2023J03);安徽省工业节电与电能质量控制协同创新中心开放课题(KFKT201504)。

摘　　要：大多数多电平逆变器通过前级结构产生不同水平的电压,后级连接到H桥臂以改变输出电压的方向。由于H桥谐波成分高,并且增加了成本,故提出一种差分对称型五电平逆变器。该逆变器拓扑结构对称、控制简单、谐波低,不需要额外的桥臂来改变输出电压的方向,其本身既能产生多个电平又能改变输出电压方向。此外,该逆变器在一个运行周期中,电容均只有一个模态放电,因此电容充电时间大于放电时间,故有足够的能量供给负载。利用MATLAB/Simulink对所提逆变器进行了仿真分析,并搭建了样机进行试验验证,仿真和试验结果与理论分析一致,证明了所提逆变器的有效性。Most multi-level inverters generate different levels of voltage through the front stage structure,and the rear stage is connected to the H-bridge arm to change the polarity of the output voltage.Due to the high harmonic content and increased cost of H-bridge,a differential symmetric five-level inverter is proposed.The inverter topology structure is symmetrical,easy to control,and has low harmonics.It does not require additional bridge arms to change the polarity of the output voltage,and the topology itself can generate multiple levels while also changing the polarity of the output voltage.In addition,the inverter has only one mode of discharge for each capacitor in one operating cycle,so the charging time of the capacitor is greater than the discharge time,and there is sufficient energy to supply the load.The proposed inverter was simulated using MATLAB/Simulink and a prototype was built for experimental verification.The simulation and experimental results were consistent with theoretical analysis,proving the effectiveness of the proposed inverter.

关 键 词：多电平 总谐波畸变率 差分 逆变器 

分 类 号：TM464[电气工程—电器]