电器与能效管理技术 ›› 2020, Vol. 593 ›› Issue (8): 62-67.doi: 10.16628/j.cnki.2095-8188.2020.08.012

• 配网技术与系统 • 上一篇    下一篇

基于故障序特性分析的配电网单相接地故障研究*

文忠进1, 肖小兵2, 刘安茳2, 龙秋风2, 郑友卓2, 张洋2   

  1. 1.贵州电网有限责任公司,贵州 贵阳 550000
    2.贵州电网有限责任公司 电力科学研究院,贵州 贵阳 550002
  • 收稿日期:2020-04-29 出版日期:2020-08-30 发布日期:2020-09-10
  • 作者简介:文忠进(1976—),男,高级工程师,主要从事配电运维管理方面研究。|肖小兵(1986—),男,高级工程师,主要从事配电技术研究。|刘安茳(1992—),男,工程师,主要从事配电技术研究。
  • 基金资助:
    南方电网有限责任公司科技项目(066600KK52170087)

Research on Single-Phase Grounding Fault of Distribution Network Based on Fault-Sequence characteristics Analysis

WEN Zhongjin1, XIAO Xiaobing2, LIU Anjiang2, LONG Qiufeng2, ZHENG Youzhuo2, ZHANG Yang2   

  1. 1. Guizhou Power Grid Co.,Ltd.,Guiyang 550000,China
    2. Guizhou Power Grid Co.,Ltd.,Electric Power Research Institute,Guiyang 550002,China
  • Received:2020-04-29 Online:2020-08-30 Published:2020-09-10

摘要:

依据电力系统知识给出零序电压和负序电流启动判据条件,同时分析配电网单相接地故障时的特征。对序特性分析方法进行研究,建立单相接地序特性模型。以电流、电压双判据融合定位故障段区,并以阻抗法对故障段区进行测距,精确定位故障点的位置,探索出一种基于序特性的多判据融合的单相接地故障辨识方法。对单相接地故障进行仿真分析,验证了方法的可行性和正确性,对配电网的安全运行具有指导意义。

关键词: 零序电压, 负序电流, 单相接地故障, 阻抗法, 序特性, 故障辨识

Abstract:

Based on the analysis of the starting criterion of zero-sequence voltage and negative-sequence current,this paper analyzes the characteristics of the single-phase grounding fault of the distribution network at the same time,studies the analysis method of the fault-sequence characteristics,and establishes the single-phase grounding sequence characteristic model. The fault segment area is fused by dual criteria of current and voltage,and the fault segment distance is measured by the impedance method to accurately locate the fault point,and a single-phase ground fault identification based on the fusion of multiple criteria of sequence characteristics is explored.The simulation analysis of single-phase grounding faults verifies the feasibility and correctness of the method,and have guiding significance for the safe operation of the distribution network.

Key words: zero-sequence voltage, negative-sequence current, single-phase grounding fault, impedance method, sequence characteristic, fault identification

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