分布式智能的小电流接地故障定位方法

孙桂花; 王敬华; 张璇; 刘国栋; 孔涛; 李龙坤

引用本文:	孙桂花,王敬华,张璇,等.分布式智能的小电流接地故障定位方法[J].电力系统保护与控制,2017,45(16):72-78.
	SUN Guihua,WANG Jinghua,ZHANG Xuan,et al.Small current grounding fault location method of distributed intelligence[J].Power System Protection and Control,2017,45(16):72-78

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分布式智能的小电流接地故障定位方法
孙桂花¹,王敬华²,张璇³,刘国栋⁴,孔涛⁵,李龙坤⁶
(1.国网山东省菏泽市定陶区供电公司，山东菏泽 274000;2.山东科汇电力自动化股份有限公司，山东淄博 255087;3.山东理工大学，山东淄博 255049;4.国网山东省电力公司菏泽供电公司，山东菏泽 274000; 5.山东送变电工程公司，山东济南 255000;6.国网山东省电力公司泰安供电公司，山东泰安 271000)

摘要:

为了减少通信压力和提高供电可靠性，提出一种分布式智能的小电流接地故障定位方法。该方法以故障点两侧的暂态零序电流相似程度低和波形差异大为基础；利用配电自动化系统终端采集故障信息，通过对等通信网络使相邻馈线终端之间交换彼此的故障信息，并两两计算它们之间的暂态零序电流相似系数；由馈线终端确定故障区段，且把故障定位的最终结果上报给主站。该方法由馈线终端单独完成，不需要主站参与，适应性广，定位速度快，通信压力小，可显著提高供电可靠性。通过ATP仿真验证了分布式智能小电流接地故障定位方法的可行性。并给出了ATP仿真实验，实验分析结果表明了该故障定位方法的可行性和有效性。

关键词: 分布式智能实时网络拓扑馈线终端相似系数故障定位

DOI：10.7667/PSPC161172

分类号:

基金项目:国家电网公司科技项目(52130416000D);淄博市校城融合发展计划(2016ZBXC121)

Small current grounding fault location method of distributed intelligence

SUN Guihua¹,WANG Jinghua²,ZHANG Xuan³,LIU Guodong⁴,KONG Tao⁵,LI Longkun⁶

(1. State Grid Dingtao Power Supply Company, Heze 274000, China;2. Shandong Kehui Power Automation Co., Ltd., Zibo 255087, China;3. Shandong University of Technology, Zibo 255049, China;4. State Grid Heze Power Supply Company, Heze 274000, China;5. Shandong Transmission and Transformation Engineering Company, Jinan 255000, China;6. State Grid Tai'an Power Supply Company, Taian 271000, China)

Abstract:

In order to reduce the communication pressure and improve the power supply reliability, a distributed intelligent fault location method for small current grounding is presented. The method based on that the similarity degree of the transient current signals is low on both sides of the fault point, but that of the same side is high. It collects failure information by the terminal of the distribution automation system, and exchanges the fault information between the adjacent terminal unit feeder by the peer to peer communication network. Then the transient zero sequence current similarity coefficient is calculated and the fault section is determined by the feeder terminal; and the final result of fault location is reported to the master station. The method is completed by the feeder terminal, which does not require the participation of the master station; it have wide adaptability, the fault section location speed is fast, and the communication pressure is small, thus the reliability of power supply can be significantly improved. The feasibility of the distributed intelligent fault location is verified by the ATP simulation. And making ATP simulation experiment, it turns out that this fault location method is effective and feasible. This work is supported by Science and Technology Project of the State Grid Corporation of China (No. 52130416000D).

Key words: distributed intelligence real-time network topology feeder terminal similarity coefficient fault location

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