基于故障电导幅值的单相接地故障复合消弧方法

doi:10.3969/j.issn.1008-0198.2026.02.004

湖南电力 ›› 2026, Vol. 46 ›› Issue (2): 23-30.doi: 10.3969/j.issn.1008-0198.2026.02.004

基于故障电导幅值的单相接地故障复合消弧方法

王文¹, 王达¹, 陈牧野¹, 刘伟民²

1.长沙理工大学电网防灾减灾全国重点实验室,湖南长沙 410114;
2.广东电网有限责任公司佛山供电局,广东佛山 528010

收稿日期:2025-11-12 修回日期:2025-11-29 出版日期:2026-04-25 发布日期:2026-05-09
作者简介:王文（1987）,男,博士,教授,研究方向为配电网有源消弧技术、模块化多电平变流器控制技术、直流微电网故障监控技术等。王达（2001）,男,硕士研究生,研究方向为配电网有源消弧技术。陈牧野（2000）,男,硕士研究生,研究方向为配电网有源消弧技术。刘伟民（2000）,男,硕士研究生,研究方向为配电网有源消弧技术。
基金资助:
国家自然科学基金项目(52477175)

Composite Arc Suppression Methods for Single-Phase Ground faults Based on fault Conductance Magnitude

WANG Wen¹, WANG Da¹, CHEN Muye¹, LiU Weimin²

1. Changsha University of Science ＆ Technology, State Key Laboratory of Disaster Prevention & Reduction for Power Grid, Changsha 410114, China;
2. Guangdong Power Grid Co., Ltd. foshan Power Supply Bureau, foshan 528010, China

Received:2025-11-12 Revised:2025-11-29 Online:2026-04-25 Published:2026-05-09

摘要/Abstract

摘要： 接地故障可靠消弧是配电网安全可靠运行的重要保障,通常在接地故障的分析中,认为配电网是三相平衡的。现有的方法在考虑线路阻抗和不对称负载的三相不平衡配电网发生单相接地故障时,消弧效果不佳。为了解决这个问题,提出一种结合电流消弧方法和电压消弧方法的混合方法,建立考虑线路参数不对称和负载不对称的配电网模型并进行分析。通过两次注入电流的方法,计算得到接地电导的阈值和两种消弧方法改进的参考值。当接地电导小于阈值时,采用电压消弧方法;当接地电导大于或等于阈值时,采用电流消弧方法。本文提出的方法可以不受线路参数不对称度、接地阻抗大小及负荷不平衡的影响,将故障电流降低至限定值以下。最后,在MATLAB/Simulink平台仿真,验证了所提消弧控制策略的可靠性和可行性。

关键词: 不平衡配电网, 单相接地故障, 电压消弧方法, 注入电流

Abstract: Reliable arc suppression of ground faults is a critical guarantee for the safe and reliable operation of distribution networks. Generally, in the analysis of ground faults, it is assumed that the distribution network is three-phase balanced. Existing methods perform poorly in suppressing arcs when considering line impedance and asymmetrical loads in three-phase unbalanced distribution networks during single-phase ground faults. To address this issue, this paper proposes a hybrid method that combines current arc suppression and voltage arc suppression techniques. A distribution network model that accounts for asymmetrical line parameters and load imbalances is established and analyzed. By injecting current twice, the threshold value of ground conductance and the reference values for improving both arc suppression methods are calculated. When the ground conductance is less than the threshold, the voltage arc suppression method is used, and when the ground resistance is greater than or equal to the threshold, the current arc suppression method is employed. The proposed method can mitigate the impact of asymmetrical line parameters, ground impedance magnitude, and load imbalance, reducing the fault current to below the limit. finally, MATLAB/Simulink simulations verify the reliability and feasibility of the proposed arc suppression control strategy.

Key words: unbalanced power network, single-phase ground fault, voltage arc suppression method, injected current

中图分类号:

TM727

王文, 王达, 陈牧野, 刘伟民. 基于故障电导幅值的单相接地故障复合消弧方法[J]. 湖南电力, 2026, 46(2): 23-30.

WANG Wen, WANG Da, CHEN Muye, LiU Weimin. Composite Arc Suppression Methods for Single-Phase Ground faults Based on fault Conductance Magnitude[J]. Hunan Electric Power, 2026, 46(2): 23-30.

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基于故障电导幅值的单相接地故障复合消弧方法

Composite Arc Suppression Methods for Single-Phase Ground faults Based on fault Conductance Magnitude

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