Online open-switch fault diagnosis method in single-phase PWM rectifiers

被引：29

作者：

Ge, Xing-Lai ^{[1
]}

Pu, Jun-Kai ^{[1
]}

Liu, Yong-Chao ^{[1
]}

机构：

[1] Southwest Jiaotong Univ, Sch Elect Engn, Chengdu 610031, Sichuan, Peoples R China

来源：

ELECTRONICS LETTERS | 2015年 / 51卷 / 23期

基金：

中国国家自然科学基金;

关键词：

Rectifying circuits - Electric switches - Voltage control - Failure analysis - Fault detection - Pulse width modulation - Electric traction;

D O I：

10.1049/el.2015.1194

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

On the basis of sampling theory, an online open-switch fault diagnosis and location method for single-phase pulse-width modulation rectifiers applied in electric railway traction is presented. First, on the basis of analysing the features of the post-fault line current under instantaneous current control strategy at low switching frequency, two specific pulse sequences for sampling line current are generated via the modulation. Then, the DC component of the sampled signal, which is easy to use for diagnostic decision, is obtained through filters. Experimental results are presented to illustrate the validity of the proposed scheme.

引用

页码：1920 / 1921

页数：2

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