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

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., Bai, Z., & 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 27, 2020
• 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.