Open AccessOnline open‐switch fault diagnosis method in single‐phase PWM rectifiers
Author(s) -
Ge XingLai,
Pu JunKai,
Liu YongChao
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2015.1194
Subject(s) - pulse width modulation , basis (linear algebra) , electronic engineering , sampling (signal processing) , modulation (music) , fault (geology) , line (geometry) , control theory (sociology) , engineering , signal (programming language) , computer science , voltage , electrical engineering , mathematics , control (management) , acoustics , physics , filter (signal processing) , artificial intelligence , geometry , seismology , geology , programming language
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.