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A Fast Diagnosis Method for Both IGBT Faults and Current Sensor Faults in Grid-Tied Three-Phase Inverters With Two Current Sensors

Li, Zhan; Wheeler, Pat; Watson, Alan; Costabeber, Alessandro; Wang, Borong; Ren, Yini; Bai, Zhihong; Ma, Hao

A Fast Diagnosis Method for Both IGBT Faults and Current Sensor Faults in Grid-Tied Three-Phase Inverters With Two Current Sensors Thumbnail


Authors

Zhan Li

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PATRICK WHEELER pat.wheeler@nottingham.ac.uk
Professor of Power Electronic Systems

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ALAN WATSON ALAN.WATSON@NOTTINGHAM.AC.UK
Associate Professor

Alessandro Costabeber

Borong Wang

Yini Ren

Zhihong Bai

Hao Ma



Abstract

© 1986-2012 IEEE. This article considers fault detection in the case of a three-phase three-wire (3P3W) inverter, when only two current sensors are used to save cost or due to a faulty current sensor. With two current sensors, there is no current method addressing the diagnosis of both IGBT open-circuit (OC) faults and current sensor faults. In order to solve this problem, this article proposes a method which innovatively combines two kinds of diagnosis variables, line voltage deviations and phase voltage deviations. The unique faulty characteristics of diagnosis variables for each fault are extracted and utilized to distinguish the fault. Using an average model, the method only needs the signals already available in the controller. Both IGBT OC faults and current sensor faults can be detected quickly in inverter mode and rectifier mode, so that the converter can be protected in a timely way to avoid further damages. In addition, error-adaptive thresholds are adopted to make the method robust. Effects such as system unbalance are analyzed to ensure that the method is robust and feasible. Simulation and experimental results are used to verify and validate the effectiveness of the method.

Citation

Li, Z., Wheeler, P., Watson, A., Costabeber, A., Wang, B., Ren, Y., …Ma, H. (2020). A Fast Diagnosis Method for Both IGBT Faults and Current Sensor Faults in Grid-Tied Three-Phase Inverters With Two Current Sensors. IEEE Transactions on Power Electronics, 35(5), 5267-5278. https://doi.org/10.1109/tpel.2019.2946692

Journal Article Type Article
Acceptance Date Oct 2, 2019
Online Publication Date Oct 10, 2019
Publication Date May 1, 2020
Deposit Date Mar 27, 2020
Publicly Available Date Mar 29, 2024
Journal IEEE Transactions on Power Electronics
Print ISSN 0885-8993
Electronic ISSN 1941-0107
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 35
Issue 5
Pages 5267-5278
DOI https://doi.org/10.1109/tpel.2019.2946692
Keywords Electrical and Electronic Engineering
Public URL https://nottingham-repository.worktribe.com/output/4055738
Publisher URL https://ieeexplore.ieee.org/document/8864023
Additional Information © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

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