[1]吕峰,蔡超,丁建忠,等.基于权重动态调整的树型配电网单相接地故障行波测距方法[J].应用科技,2020,47(2):53-58.[doi:10.11991/yykj.201907009]
 LYU Feng,CAI Chao,DING Jianzhong,et al.Traveling wave fault location method for single-phase grounding fault in tree-type distribution network based on dynamic weight adjustment[J].Applied science and technology,2020,47(2):53-58.[doi:10.11991/yykj.201907009]
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基于权重动态调整的树型配电网单相接地故障行波测距方法(/HTML)
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《应用科技》[ISSN:1009-671X/CN:23-1191/U]

卷:
第47卷
期数:
2020年2期
页码:
53-58
栏目:
现代电子技术
出版日期:
2020-03-05

文章信息/Info

Title:
Traveling wave fault location method for single-phase grounding fault in tree-type distribution network based on dynamic weight adjustment
作者:
吕峰1 蔡超2 丁建忠1 袁海星1 沈海平1 胡金峰1 孙国强2
1. 国网江苏省电力有限公司无锡供电分公司,江苏 无锡 214061;
2. 河海大学 能源与电气学院,江苏 无锡 211100
Author(s):
LYU Feng1 CAI Chao2 DING Jianzhong1 YUAN Haixing1 SHEN Haiping1 HU Jinfeng1 SUN Guoqiang2
1. State Grid Jiangsu Power Supply Company Wuxi Branch, Wuxi 214061, China;
2. College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China
关键词:
权重调整配电网单相接地故障行波测距误差比较极性关系故障选线行波波速
Keywords:
weight adjustmentdistribution networksingle-phase grounding faulttraveling wave fault locationerror comparepolarity relationshipfault line selectiontraveling wave velocity
分类号:
TM773
DOI:
10.11991/yykj.201907009
文献标志码:
A
摘要:
针对树型配电网分支众多而难以准确选线的问题,本文通过分析发现了不同线路故障初始电流电压行波的极性关系,提高了配电网分支选线的准确率。由于缆线混联线路中的零模波速很不稳定,难以通过线路参数精确获取,提出了基于权重动态调整的树型配电网单相接地故障行波测距方法,以双端行波测距理论为基础,对线路已有的多端行波测距装置进行自由组合,计算得到多组故障定位结果。通过历史临近故障测距结果误差比较,动态调整各行波测距装置组的权重值,从而进行故障信息的融合决策,给出最终的故障点位置。因此,本文通过故障点同侧行波测距装置组的故障信息对其波速进行在线测量,使得用于故障定位的波速值更贴合实际。最后,采用PSCAD软件对江苏某实际10 kV配电系统进行仿真验证。仿真结果表明,所提方法不受中性点接地方式的影响,在不同过渡电阻以及系统不同运行方式下均能实现接地故障的精确定位。
Abstract:
Aiming at the problem that there are numerous branches in the tree-type distribution network and it is difficult to accurately select lines, the polarity relationship of initial current and voltage traveling waves of different lines is found through analysis in this paper, which improves the accuracy of branch line selection of distribution network. Because the zero-mode wave velocity in cable hybrid transmission line is not stable, it is difficult to obtain it precisely through line parameters. A traveling wave fault location method for single-phase grounding fault in tree-type distribution network is proposed based on dynamic weight adjustment. Based on the theory of two-terminal traveling wave fault location, the existing multi-terminal traveling wave fault location devices are combined freely, and the results of multi-group fault location are obtained. By comparing the errors of fault location results in history, the weight of each wave fault location device group is dynamically adjusted. Then, the fusion decision of fault information is made, and the final fault location is given. Therefore, the fault information of traveling wave fault location devices group on the same side of fault point is utilized in this paper to measure its wave velocity online, so that the wave velocity value used in fault location is more practical. Finally, PSCAD software is used to simulate and verify a practical 10 kV distribution system. The simulation results show that the proposed method is not affected by neutral grounding modes, and can realize accurate grounding fault location at different transition resistances and different operation modes of the system.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-07-11。
基金项目:国家重点研发计划资助项目(J2017143-2);江苏省电力公司科技资助项目(J2017143-2)
作者简介:吕峰,男,高级工程师;蔡超,男,硕士研究生
通讯作者:蔡超,E-mail:1227474921@qq.com
更新日期/Last Update: 2020-04-21