Research on Transient Process Analysis and Optimization Method of Flexible Grounding in Distribution Networks

ZHOU Jianghua; WAN Shanming; YAN Wenbo; YANG Yizhou; ZHANG Yong; HUA Zhichao

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Research on Transient Process Analysis and Optimization Method of Flexible Grounding in Distribution Networks

更新时间：2025-12-08

- Research on Transient Process Analysis and Optimization Method of Flexible Grounding in Distribution Networks
- Vol. 45, Issue 10, Pages: 3149-3156(2019)
- 作者机构：
  
  1. 华中科技大学强电磁工程与新技术国家重点实验室
  2. 西安交通大学电力设备电气绝缘国家重点实验室
  3. 国网福建省电力有限公司厦门供电公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 October 2019，
  
  Published：2019
- 稿件说明：
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ZHOU Jianghua, WAN Shanming, YAN Wenbo, et al. Research on Transient Process Analysis and Optimization Method of Flexible Grounding in Distribution Networks[J]. 2019, 45(10): 3149-3156.
DOI：

ZHOU Jianghua, WAN Shanming, YAN Wenbo, et al. Research on Transient Process Analysis and Optimization Method of Flexible Grounding in Distribution Networks[J]. 2019, 45(10): 3149-3156. DOI：

摘要

针对传统配电网谐振接地方式无法实现暂态过程补偿的问题

通过对新型柔性接地暂态过程进行分析

提出了一种基于柔性接地方式的暂态响应优化方法。当发生单相接地故障后

通过有源逆变器向配电网中性点注入有功分量及无功分量的补偿电流

从而优化单相接地故障的暂态响应。理论分析与仿真结果表明

补偿电流有功分量可加快暂态过程的衰减并抑制瞬态过电压的幅值;无功分量则用于补偿消弧线圈的暂态电流

由此降低建弧率或使得电弧快速熄灭

减小由瞬时性故障发展成为永久性故障的概率。该暂态响应优化方法能够实现单相接地故障暂态期间柔性消弧与可靠自愈

进一步提升了配电网的运行可靠性。

Abstract

In order to solve the problem that the way of resonant grounding can not be adopted to realize the compensation of the transient process

a transient response optimization method based on flexible grounding was proposed by analyzing the transient process. When single-phase grounding fault occurs

the compensation current of active and reactive components is injected into the neutral point of distribution network by inverter to optimize the transient response. Theoretical analysis and simulation results show that the active component of compensation current can accelerate the attenuation of transient process and restrain the amplitude of transient overvoltage; the reactive current component is used to compensate the transient current of arc-suppression coil. The optimization method can be adopted to reduce the probability of establishing arc and the possibility from instantaneous fault to permanent fault or rapidly extinguish arc. Therefore

the optimization method can be adopted to achieve flexible arc suppression and reliable self-healing during transient period of single-phase grounding fault and to improve the operation reliability of distribution network.

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