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Multi-Frequency bands based Pole-to-Ground fault detection method for MMC-Based radial DC distribution systems

Yang, Changqing; Lin, Shuyue; Guo, Moufa

Authors

Changqing Yang

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Dr Shuyue Lin S.Lin@hull.ac.uk
Lecturer in Electrical and Electronic Engineering

Moufa Guo



Abstract

In a small-current grounding system, the pole-to-ground fault may cause the voltage drop in the fault pole and the voltage rise in the other poles. In flexible DC distribution systems, Severe voltage variation may shorten the insulation lifetime of the equipment, which leads to great concerns on the safety issue. In addition, the existence of high transition resistance degrades the accuracy of fault detection methods, thus further affecting the reliability of the system. Therefore, it is essential to explore an advanced technology for faulty feeder detection. This study proposes a faulty feeder detection method based on the characteristics of transient zero-mode current (TZMC) in multi-frequency bands. The change rate of zero-mode voltage is applied as the protection activation criterion. Then, the characteristic matrix is constructed via computing the fuzzy entropy of TZMC in each frequency band. Finally, the faulty feeder can be identified by conducting fuzzy C-means on the characteristic matrix. This proposed method is tested through simulations on the PSCAD/EMTDC platform, which successfully demonstrates its outstanding adaptability, reliability, and accuracy.

Citation

Yang, C., Lin, S., & Guo, M. (2022). Multi-Frequency bands based Pole-to-Ground fault detection method for MMC-Based radial DC distribution systems. International Journal of Electrical Power & Energy Systems, 141, Article 108250. https://doi.org/10.1016/j.ijepes.2022.108250

Journal Article Type Article
Acceptance Date Apr 11, 2022
Online Publication Date Apr 21, 2022
Publication Date 2022-10
Deposit Date Apr 29, 2022
Publicly Available Date Apr 22, 2023
Journal International Journal of Electrical Power & Energy Systems
Print ISSN 0142-0615
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 141
Article Number 108250
DOI https://doi.org/10.1016/j.ijepes.2022.108250
Keywords Faulty feeder detection; Multi-frequency bands; Pole-to-ground fault; Radial DC distribution systems; Transient zero-mode current
Public URL https://hull-repository.worktribe.com/output/3983671
Additional Information This article is maintained by: Elsevier; Article Title: Multi-Frequency bands based Pole-to-Ground fault detection method for MMC-Based radial DC distribution systems; Journal Title: International Journal of Electrical Power & Energy Systems; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.ijepes.2022.108250; Content Type: article; Copyright: © 2022 Elsevier Ltd. All rights reserved.

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This file is under embargo until Apr 22, 2023 due to copyright reasons.

Contact S.Lin@hull.ac.uk to request a copy for personal use.


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