H桥多电平逆变器的新型调制

兰州理工大学学报 ›› 2020, Vol. 46 ›› Issue (5): 85-91.

• 自动化技术与计算机技术 • 上一篇下一篇

H桥多电平逆变器的新型调制

胡文华, 谭光辉, 章超凡

华东交通大学电气与自动化工程学院, 江西南昌 330013

收稿日期:2019-07-12 出版日期:2020-10-28 发布日期:2020-11-06
作者简介:胡文华(1972-),男,江西南昌人,副教授.
基金资助:
国家自然科学基金(51567009),江西省应用研究培育计划(20181BBE58008)

New modulation of H-bridge multi-level inverter

HU Wen-hua, TAN Guang-hui, ZHANG Chao-fan

School of Electrical and Automation Engineering, East China Jiaotong University, Nanchang 330013, China

Received:2019-07-12 Online:2020-10-28 Published:2020-11-06

摘要/Abstract

摘要： 针对传统PD调制法应用在级联H桥多电平逆变器时存在的输出功率不均衡问题,提出一种基于1/4输出周期载波循环的优化调制策略,使得逆变器各级联单元的输出功率均衡,且开关管的最高开关频率降为原来的一半,降低了开关损耗.该优化调制策略比传统PD调制需要的三角载波数量更少,调制更简单.以四单元级联H桥多电平逆变器为例进行理论分析,并通过仿真实验验证了所提方法的正确性.

关键词: 功率均衡, 级联H桥, 载波循环, 开关损耗, 优化调制

Abstract: In order to solve the problem of output power imbalance when traditional PD modulation method is applied to cascaded H-bridge multilevel inverter, this paper proposes an optimal modulation strategy on the basis of 1/4 output period carrier cycle, which makes the output power of all levels of inverter balanced. The maximum switching frequency of a switch tube is reduced to 1/2 compared to original, thus reducing the switching loss as a result. The optimal modulation strategy proposed in this paper requires only less triangular carriers as well as simpler modulation than traditional PD modulation. The author takes a four-unit cascaded H-bridge multilevel inverter as an example for theoretical analysis, and the correctness of the proposed method has been verified by simulation experiments.

Key words: power balance, cascaded H-bridge, carrier rotation, switching loss, optimized modulation

中图分类号:

TM464

胡文华, 谭光辉, 章超凡. H桥多电平逆变器的新型调制[J]. 兰州理工大学学报, 2020, 46(5): 85-91.

HU Wen-hua, TAN Guang-hui, ZHANG Chao-fan. New modulation of H-bridge multi-level inverter[J]. Journal of Lanzhou University of Technology, 2020, 46(5): 85-91.

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H桥多电平逆变器的新型调制

New modulation of H-bridge multi-level inverter

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