对称双向多电平逆变器单极性LS-PWM调制策略  

Single-pole LS-PWM Modulation Strategy for Symmetric Bidirectional Multilevel Inverters

作　　者：叶满园 尧佳新 喻生铭 刘文芳 夏辉 陈韬 YE Manyuan;YAO Jiaxin;YU Shengming;LIU Wenfang;XIA Hui;CHEN Tao(School of Electrical and Automation Engineering,East China Jiaotong University,Nanchang 330013,China;Huaining County Power Supply Company,State Grid Anhui Electric Power Co.,Ltd.,Anqing 246121,China)

机构地区：[1]华东交通大学电气与自动化工程学院,南昌330013 [2]国网安徽省电力有限公司怀宁县供电公司,安庆246121

出　　处：《高电压技术》2024年第4期1560-1570,I0034,共12页High Voltage Engineering

基　　金：国家自然科学基金(52267014);江西省研究生创新资金项目(YC2022-s525)。

摘　　要：针对传统功率开关器件-二极管(power switch-diode,PSD)多电平逆变器拓扑存在反向电流和电压尖峰的问题,提出一种对称双向PSD多电平逆变器拓扑,该拓扑通过增加反向电流回流路径的方式,不仅能够解决传统PSD拓扑存在的反向电流和电压尖峰问题,而且在使用功率器件数量、总阻塞电压以及开关损耗等方面均具备优势。为了控制逆变器运行时反向电流的流向,通过对对称双向级联型多电平逆变器的开关状态进行分析,提出一种适用的单极性LS-PWM调制策略,该调制策略可降低逆变器开关损耗,同时防止功率倒灌。最后通过仿真和实验结果验证了该拓扑及调制策略的有效性。In response to the problems of reverse current and voltage spikes in the traditional power switch diode(PSD)multilevel inverter topology,this paper proposes a symmetrical bidirectional PSD multilevel inverter topology.By increasing the reverse current return path,this topology can not only solve the reverse current and voltage spike problems in the traditional PSD topology,but also improve the performances in using the number of power devices,and has advantages in terms of total blocking voltage and switching losses.In order to control the direction of reverse current during inverter operation,this paper analyzes the switching state of symmetric bidirectional cascaded multilevel inverters and proposes a suitable unipolar LS-PWM modulation strategy.This modulation strategy can reduce inverter switching losses while preventing power backflow.Finally,the effectiveness of the topology and modulation strategy is verified by simulation and experimental results.

关 键 词：PSD多电平逆变器 反向电流 电压尖峰 LS-PWM调制策略 功率倒灌 

分 类 号：TM464[电气工程—电器]