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Fault Line Selection Method of Resonant Grounding System Based on Zero-sequence Current Disturbance Characteristics
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Qing WANG1, Yang SUN1, Jiang-peng LI1, Long YANG1, Jin-dong LI1, Wen-quan SHAO2, *, Shuang ZHANG2
Science Technology and Engineering | 2025, 25(20) : 8536 - 8542
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Science Technology and Engineering | 2025, 25(20): 8536-8542
• Papers·Electrical Technology •
Fault Line Selection Method of Resonant Grounding System Based on Zero-sequence Current Disturbance Characteristics
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Qing WANG1, Yang SUN1, Jiang-peng LI1, Long YANG1, Jin-dong LI1, Wen-quan SHAO2, *, Shuang ZHANG2
Affiliations
  • 1 State Grid Ningxia Electric Power Co., Ltd., Yinchuan 750001, China
  • 2 Electronics and Information College, Xi’an Polytechnic University, Xi’an 710048, China
Published: 2025-07-18 doi: 10.12404/j.issn.1671-1815.2404757
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In order to solve the fault line selection problem of single-phase high resistance grounding in resonant grounded distribution systems, a fault line selection scheme was proposed that utilized the disturbance characteristics of zero-sequence current before and after the neutral point parallel resistor was grounded. The zero-sequence fault model was established for the two conditions before and after the resistor paralleling with the arc suppression coil, and the zero-sequence current variation characteristics of sound and faulty lines were analyzed correspondingly. The amplitude of the zero-sequence current of any healthy line decreased after the neutral resistance was applied, while the current of the faulty line increased. Furthermore, a fault line selection criteria was constructed, which was used the amplitude disturbance characteristics of the zero-sequence currents. Simulations based on MATLAB verified the correctness and effectiveness of the proposed method. The results show that the proposed scheme is able to reliably detect single-phase ground fault with the resistance up to 5 kΩ.

distribution network  /  fault line selection  /  neutral point parallel resistor  /  zero-sequence current disturbance
Qing WANG, Yang SUN, Jiang-peng LI, Long YANG, Jin-dong LI, Wen-quan SHAO, Shuang ZHANG. Fault Line Selection Method of Resonant Grounding System Based on Zero-sequence Current Disturbance Characteristics[J]. Science Technology and Engineering, 2025 , 25 (20) : 8536 -8542 . DOI: 10.12404/j.issn.1671-1815.2404757
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Year 2025 volume 25 Issue 20
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Article Info
doi: 10.12404/j.issn.1671-1815.2404757
  • Receive Date：2024-06-25
  • Online Date：2026-05-13
  • Published：2025-07-18
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History
  • Received：2024-06-25
  • Revised：2025-04-10
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Affiliations
    1 State Grid Ningxia Electric Power Co., Ltd., Yinchuan 750001, China
    2 Electronics and Information College, Xi’an Polytechnic University, Xi’an 710048, China
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