DocumentCode :
3610131
Title :
Online open-switch fault diagnosis method in single-phase PWM rectifiers
Author :
Xing-Lai Ge ; Jun-Kai Pu ; Yong-Chao Liu
Author_Institution :
Sch. of Electr. Eng., Southwest Jiaotong Univ., Chengdu, China
Volume :
51
Issue :
23
fYear :
2015
Firstpage :
1920
Lastpage :
1922
Abstract :
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.
Keywords :
PWM rectifiers; electric locomotives; fault currents; fault diagnosis; power engineering computing; signal sampling; switching convertors; traction power supplies; diagnostic decision; electric railway traction; instantaneous current control strategy; low switching frequency; online open-switch fault diagnosis method; online open-switch fault location method; post-fault line current; sampling line current; sampling theory; single-phase PWM rectifier; single-phase pulse width modulation rectifier; specific pulse sequences;
fLanguage :
English
Journal_Title :
Electronics Letters
Publisher :
iet
ISSN :
0013-5194
Type :
jour
DOI :
10.1049/el.2015.1194
Filename :
7323940
Link To Document :
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