NDLI: Online diagnostic method of open-switch faults in PWM voltage source rectifier based on instantaneous AC current distortion

Content Provider	IET Digital Library
Author	Shi, Tiancheng He, Yigang Deng, Fangming Tong, Jin Wang, Tao Shi, Luqiang
Abstract	The three-phase pulse-width modulating (PWM) voltage source rectifier (VSR) system is widely used because of its advantages in performance. Numerous studies show that power semiconductors are significant contributors to the overall failure rate of power converters. This study presents an online diagnosis method for a single open-switch fault of a three-phase PWM VSR, because existing research mainly focuses on fault diagnosis of inverters. The proposed method employs current distortion to diagnose faults in a convenient and simple way. It requires no extra hardware but only AC current signals, which are available in the control system and can be embedded into the existing driving software as a subroutine without excessive computational effort. The proposed method offers high diagnostic effectiveness and reliability. Experimental results show that the proposed method can diagnose the faulty switch at low currents as well as under abrupt load transient conditions without false alarms. Furthermore, the average diagnostic time of this method is only 1.8 ms.
Starting Page	447
Ending Page	454
Page Count	8
ISSN	17518660
Volume Number	12
e-ISSN	17518679
Issue Number	Issue 3, Mar (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-epa/12/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2017.0438
Journal	IET Electric Power Applications
Publisher Date	2017-11-17
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC Current Signal Current Distortion Fault Diagnosis Faulty Switch Diagnosis Instantaneous AC Current Distortion Invertors Load Transient Condition Online Diagnosis Method Online Diagnostic Method Open-switch Fault PWM Rectifier PWM Voltage Source Rectifier Single Open-switch Fault Three-phase PWM Voltage Source Rectifier Voltage-source Converter VSR System
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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