A compensated impedance based ground fault locator for an unearthed power system

Jahanger, Hayder K.; Raqib, Abdurrahman; Thomas, David W.P.; Sumner, Mark

Abstract

Continuous operation of a power system during a ground fault can be achieved by employing either a High Resistance Grounded (HRG) power source or a floating power source. However, if a second ground fault occurs in the system it can cause significant problems and therefore the presence of the First Ground Fault (FGF) must be detected, located, and repaired quickly. In this study, an active impedance based fault location method is proposed to locate the FGF in a HRG power system. The study presented shows that the magnitude of the fault resistance has only a small influence on the proposed technique. However, for unbalanced faults, the impedance of the healthy phases can distort the impedance measured and impair the accuracy of the fault location method. Therefore, a new compensated method is proposed to compensate for this distortion. The results show that a high accuracy can be achieved with the compensation, with a location error lower than 5%.

Citation

Jahanger, H. K., Raqib, A., Thomas, D. W., & Sumner, M. (2021). A compensated impedance based ground fault locator for an unearthed power system. In 10th International Conference on Power Electronics, Machines and Drives (PEMD 2020) (592 – 597). https://doi.org/10.1049/icp.2021.1001

• Conference Name: 10th International Conference on Power Electronics, Machines and Drives (PEMD 2020)
• Conference Location: Online Conference
• Start Date: Dec 15, 2020
• End Date: Dec 17, 2020
• Acceptance Date: Nov 6, 2019
• Online Publication Date: Sep 22, 2021
• Publication Date: Sep 22, 2021
• Deposit Date: Feb 16, 2022
• Publicly Available Date: Feb 16, 2022
• Pages: 592 – 597
• Series Title: International Conference on Power Electronics, Machines and Drives (PEMD)
• Book Title: 10th International Conference on Power Electronics, Machines and Drives (PEMD 2020)
• ISBN: 9781839535420
• DOI: https://doi.org/10.1049/icp.2021.1001
• Public URL: https://nottingham-repository.worktribe.com/output/7470160
• Publisher URL: https://ieeexplore-ieee-org.nottingham.idm.oclc.org/document/9545240
• Related Public URLs: https://digital-library.theiet.org/content/conferences/10.1049/icp.2021.1001
• Additional Information: © 2020 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.