Research on fault location method for distribution lines based on additional inductance strategy

Weiji Zhou; Jun Lin; Zekun Long; Feifei Liu; Mingfei He; Weiji Zhou; Jun Lin; Zekun Long; Feifei Liu; Mingfei He

doi:10.3934/energy.2025010

AIMS Energy

2025, Volume 13, Issue 2: 250-264. doi: 10.3934/energy.2025010

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Research article

Research on fault location method for distribution lines based on additional inductance strategy

1.
School of Energy and Materials, Shihezi University, Shihezi, Xinjiang, 832000, China
2.
Institute of Bingtuan Energy Development Research, Shihezi University, Shihezi, Xinjiang, 832000, China
3.
HOPE Electronic Co., ltd Xinjiang, Urumqi, Xinjiang, 830047, China

Received: 20 October 2024 Revised: 15 February 2025 Accepted: 04 March 2025 Published: 17 March 2025

When a fault occurs on a distribution line, transient fault signals fade quickly, leaving only a short period of time for measurement and sampling. In addition, timing discrepancies between multiple measuring devices affect the accuracy of fault localization. This study proposes a method for fault detection in distribution lines based on an auxiliary inductance approach, where auxiliary inductors are introduced after the trip to provide steady-state fault data for localization. For asymmetrical short-circuit faults, the fault voltage is calculated from current and voltage measurements at both ends of the line, and the ratio of positive to negative sequence voltages is used to compensate for the phase angle and generate fault location functions. For symmetrical short-circuit faults, the voltage ratio between two faulted phases eliminates asynchronous angles, facilitating the derivation of fault location functions. Simulation results show that this method achieves high accuracy and is robust to differences in fault location, transition resistance, fault types, and synchronous angles.
- fault location,
- distribution network,
- timing error,
- additional inductance strategy,
- steady-state information
Citation: Weiji Zhou, Jun Lin, Zekun Long, Feifei Liu, Mingfei He. Research on fault location method for distribution lines based on additional inductance strategy[J]. AIMS Energy, 2025, 13(2): 250-264. doi: 10.3934/energy.2025010

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Abstract

When a fault occurs on a distribution line, transient fault signals fade quickly, leaving only a short period of time for measurement and sampling. In addition, timing discrepancies between multiple measuring devices affect the accuracy of fault localization. This study proposes a method for fault detection in distribution lines based on an auxiliary inductance approach, where auxiliary inductors are introduced after the trip to provide steady-state fault data for localization. For asymmetrical short-circuit faults, the fault voltage is calculated from current and voltage measurements at both ends of the line, and the ratio of positive to negative sequence voltages is used to compensate for the phase angle and generate fault location functions. For symmetrical short-circuit faults, the voltage ratio between two faulted phases eliminates asynchronous angles, facilitating the derivation of fault location functions. Simulation results show that this method achieves high accuracy and is robust to differences in fault location, transition resistance, fault types, and synchronous angles.

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