三电平逆变器综合性能优化不连续空间矢量调制策略  

Discontinuous Space Vector PWM for Three-Level Inverter with Comprehensive Performance Optimization

作　　者：史婷娜 刘潮 张国政 谷鑫[2] 夏长亮 Shi Tingna;Liu Chao;Zhang Guozheng;Gu Xin;Xia Changliang(School of Electrical and Information Engineering Tianjin University Tianjin 300072 China;Tianjin Engineering Center of Electric Machine System Design and Control Tianjin Polytechnic University Tianjin 300387 China)

机构地区：[1]天津大学电气自动化与信息工程学院,天津300072 [2]天津工业大学天津市电机系统先进设计与智能控制技术工程中心,天津300387

出　　处：《电工技术学报》2018年第24期5874-5883,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金重大项目(51690180);天津市高等学校创新团队培养计划项目(TB13-5039)资助

摘　　要：以中点钳位(NPC)型三电平逆变器为研究对象,综合考虑开关损耗和输出电流谐波性能,在此基础上提出综合性能最优的空间矢量调制策略。通过对开关损耗与电流谐波进行定量计算,得到综合性能指标FSWR与调制度m、参考矢量角θ和功率因数角?之间的关系。除了传统正、负电平钳位状态开关序列外,将零电平钳位状态开关序列作为备选序列,并以FSWR最小为原则对各个区域进一步划分,确定"+"、"-"和"0"三种钳位状态的最优作用子区域,实现对逆变器性能的综合优化。提出的开关序列选取方法对于综合改善逆变器的开关损耗与输出电流谐波性能具有指导意义。Taking the neutral-point-clamped(NPC)three-level inverter as the research object,a space vector modulation strategy with optimal comprehensive performance is proposed by considering switching loss and output current harmonic.The relationship between the comprehensive performance index FSWR and modulation index m,reference vector angleθand power factor angleψis derived out by quantifying the switching loss and current harmonic calculation.In addition to the switching sequences of the conventional positive and negative clamping states,the switching sequence of zero clamping state is applied as an alternative sequence,the further distribution of each region is based on the minimum FSWR principle to determine optimal sub region of the“+”,“?”and“0”three clamping states,and then the comprehensive performance optimization of inverter is realized.Thus,the proposed method of switching sequence selection is helpful for improving the switching loss and output current harmonic performance of the inverter.

关 键 词：中点钳位型三电平逆变器 不连续空间矢量调制 开关损耗 输出电流谐波 

分 类 号：TM464[电气工程—电器]