配电网多电缆线路耦合接地故障分析及处理

doi:10.11985/2017.10.006

电气工程学报 ›› 2017, Vol. 12 ›› Issue (10): 37-44.doi: 10.11985/2017.10.006

配电网多电缆线路耦合接地故障分析及处理

马洲俊^1,²,陈建坤²,兰岚²,许洪华²

^1. 河海大学能源与电气学院南京 210098
^2. 南京供电公司南京 210019

收稿日期:2017-02-26 出版日期:2017-10-25 发布日期:2017-10-25
作者简介:马洲俊男 1986年生,工程师,主要研究方向为电网调控运行及电网规划。|陈建坤男 1982年生,工程师,主要从事电网继电保护方面的工作。
基金资助:
江苏省电力公司重点科技项目“基于大数据的主动配电网运行监测与故障诊断技术研究与应用”(J2017074);国家高技术研究发展计划[863计划]“智能配电网优化调度关键技术研究”(2012AA050214)

Analysis and Handling of Coupling Grounding Fault for Multi-Cable Lines in Distribution Network

Ma Zhoujun^1,²,Chen Jiankun²,Lan Lan²,Xu Honghua²

^1. Hohai University Nanjing 210098 China
^2. Nanjing Power Supply Company Nanjing 210019 China

Received:2017-02-26 Online:2017-10-25 Published:2017-10-25

摘要/Abstract

摘要：

电力电缆具有可靠性高、供电能力强、节省空间及对环境影响程度小等优点,因此,城市配电网电缆化率不断提高。本文就一起配电网多电缆线路相继跳闸的故障展开分析,对同母线的多条10kV电缆出线故障、电缆屏蔽层接地电流、零序电流互感器正确接线以及用户内部中性点接地的影响等问题进行深入分析,并从时间和空间上对文中所提的耦合接地故障进行关联分析,演绎了故障发生、发展的过程,提出了改进建议,为电网运维及管理人员正确处理复杂耦合配电网故障提供参考。

关键词: 配电网, 多电缆线路, 单相接地, 耦合故障, 零序电流互感器, 中性点接地

Abstract:

Power cable has many advantages such as high reliability, strong power supply capacity, space saving, environmentally friendly and so on. Therefore the penetrance of power cable in city distribution network is increasing. In the paper the successively tripping fault of one particular distribution network multi-cable line is studied. Aiming to one bus, the fault of 10kV multi-cable lines, grounding current of cable shielding layer, and impact of zero sequence current on correct wiring and neutral point earthing of users sides are studied. The coupling grounding fault is analyzed combining time and space, also the occurrence and development of fault is deduced. Finally, some advices are proposed for better operation and dealing with complicated coupling fault.

Key words: Distribution network, multi-cable line, single-phase ground fault, coupling fault, zero sequence current transformer, neutral grounding

中图分类号:

TM726

马洲俊,陈建坤,兰岚,许洪华. 配电网多电缆线路耦合接地故障分析及处理[J]. 电气工程学报, 2017, 12(10): 37-44.

Ma Zhoujun,Chen Jiankun,Lan Lan,Xu Honghua. Analysis and Handling of Coupling Grounding Fault for Multi-Cable Lines in Distribution Network[J]. Journal of Electrical Engineering, 2017, 12(10): 37-44.

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配电网多电缆线路耦合接地故障分析及处理

Analysis and Handling of Coupling Grounding Fault for Multi-Cable Lines in Distribution Network

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