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

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 reliabi...

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Bibliographic Details
Published in:Energies (Basel) 2024-07, Vol.17 (14), p.3510
Main Authors: Li, Zhengyang, Cao, Yijia, Chen, Chun, Li, Yansha, Li, Jinglu
Format: Article
Language:English
Subjects:
Asymmetry
Collaboration
fault area isolation
high-impedance grounding fault
Identification
Localization
Methods
polarity difference
Power supply
waveform characteristics
Wavelet transforms
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Summary: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.
ISSN:1996-1073
1996-1073
DOI:10.3390/en17143510