电工技术学报2006，Vol.21Issue(9)：81-87,7.
级联多电平逆变器全调制比的特定谐波消除
Selective Harmonic Elimination for All Modulation Indices of Multilevel Cascaded Converter
宋平岗 1官二勇2
作者信息
- 1. 西南交通大学电气工程学院,成都,610031
- 2. 华东交通大学电气工程学院,南昌,330013
- 折叠
摘要
Abstract
This paper presents a multi-pattern method which is employed to compute the switching angles in a multilevel converter so as to produce the required fundamental voltage while at the same time not generate the selective harmonics. Using a staircase fundamental switching scheme, previous work has shown that it is possible to produce solutions only for higher ranges of the modulation index. Here four patterns are shown to extend the lower range of modulation indices for which such switching angles still exist. A unified approach called homotopy algorithm is presented to solve the SHE equations for all of the various switching patterns. The nonlinear and transcendental equations with homotopy algorithm from mathematical point is analyzed mainly in this paper. In particular, it is shown that all patterns require solving the same set of equations where each pattern is distinguished by the location of the roots of SHE equations. In contrast to iterative numerical techniques, the approach here can produce all solutions in a large convergence extent. The experimental results verify the precision of the multi-pattern method.关键词
选择谐波消除/多段式模式/同伦算法/级联H桥Key words
Selective harmonic elimination/multi-pattern/homotopy algorithm/cascaded H-bridge分类
信息技术与安全科学引用本文复制引用
宋平岗,官二勇..级联多电平逆变器全调制比的特定谐波消除[J].电工技术学报,2006,21(9):81-87,7.
