三电平逆变器综合性能优化不连续空间矢量调制策略

doi:10.19595/j.cnki.1000-6753.tces.171298

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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F_SWR与调制度m、参考矢量角θ 和功率因数角φ 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F_SWR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。

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	史婷娜
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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

Abstract：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 F_SWR and modulation index m, reference vector angle θ and power factor angle φ is 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 F_SWR 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.

Key words： Neutral-point-clamped three-level inverter space vector based discontinuous modulation switching loss output current harmonic

收稿日期: 2017-09-11 出版日期: 2018-12-29

PACS:

TM464

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

通讯作者: 史婷娜女,1969年生,教授,博士生导师,研究方向为电机及其控制。E-mail: tnshi@tju.edu.cn

作者简介: 刘潮男,1994年生,硕士研究生,研究方向为三电平逆变器调制。E-mail: liuchao003@tju.edu.cn

引用本文:

史婷娜, 刘潮, 张国政, 谷鑫, 夏长亮. 三电平逆变器综合性能优化不连续空间矢量调制策略[J]. 电工技术学报, 2018, 33(24): 5874-5883. Shi Tingna, Liu Chao, Zhang Guozheng, Gu Xin, Xia Changliang. Discontinuous Space Vector PWM for Three-Level Inverter with Comprehensive Performance Optimization. Transactions of China Electrotechnical Society, 2018, 33(24): 5874-5883.

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