Fault Handling and Localization Strategy Based on Waveform Characteristics Recognition with Coordination of Peterson Coil and Resistance Grounding Method

Zhengyang Li, Yijia Cao (), Chun Chen, Yansha Li and Jinglu Li
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Zhengyang Li: School of Electrical & Information Engineering, Changsha University of Science and Technology, Changsha 410114, China
Yijia Cao: School of Electrical & Information Engineering, Changsha University of Science and Technology, Changsha 410114, China
Chun Chen: School of Electrical & Information Engineering, Changsha University of Science and Technology, Changsha 410114, China
Yansha Li: School of Electrical & Information Engineering, Changsha University of Science and Technology, Changsha 410114, China
Jinglu Li: School of Electrical & Information Engineering, Changsha University of Science and Technology, Changsha 410114, China

Energies, 2024, vol. 17, issue 14, 1-23

Abstract: To address challenges in locating high-impedance grounding faults (HIGFs) and isolating fault areas in resonant grounding systems, this paper proposes a novel fault identification method based on coordinating a Peterson coil and a resistance grounding system. This method ensures power supply reliability by extinguishing the fault arc during transient faults with the Peterson coil. When a fault is determined to be permanent, the neutral point switches to a resistance grounding mode, ensuring regular distribution of zero-sequence currents in the network, thereby addressing the challenges of HIGF localization and fault area isolation. Fault calibration and nature determination rely on recognizing neutral point displacement voltage waveforms and dynamic characteristics, eliminating interference from asymmetric phase voltage variations. Fault area identification involves assessing the polarity of zero-sequence current waveforms attenuation during grounding mode switching, preventing misjudgments in grounding protection due to random initial fault angles and Peterson coil compensation states. Field experiments validate the feasibility of this fault location method and its control strategy.

Keywords: high-impedance grounding fault; fault area isolation; waveform characteristics; polarity difference (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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