基于双端信息的高压架空线断线故障识别原理

卢正飞; 蔡宜君; 刘子俊; 朱可凡; 胡子珩; 王玉玺; 文明浩

引用本文:	卢正飞,蔡宜君,刘子俊,等.基于双端信息的高压架空线断线故障识别原理[J].电力系统保护与控制,2018,46(20):39-45.
	LU Zhengfei,CAI Yijun,LIU Zijun,et al.A line break fault protection algorithm for high voltage overhead line based on two-terminal information[J].Power System Protection and Control,2018,46(20):39-45

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基于双端信息的高压架空线断线故障识别原理
卢正飞¹,蔡宜君²,刘子俊¹,朱可凡²,胡子珩¹,王玉玺²,文明浩²
(1.深圳供电局有限公司，广东深圳 518001;2.强电磁工程与新技术国家重点实验室(华中科技大学)，湖北武汉 430074)

摘要:

高压架空线路受外力和雷击影响容易发生断线故障，而目前的线路保护装置需要故障线路落地后才能准确对断线故障进行识别。针对目前缺乏专门的断线故障保护方法的问题，提出一种基于双端信息的线路断线故障保护新原理。新原理利用线路两端的电压、电流信息，分别计算各相线路“计算电压降落”和“测量电压降落”，并根据两种电压降落之差的幅值和线路电流的大小，实现了断线故障的快速可靠识别。最后，在PSCAD/EMTDC平台对所提保护原理进行了仿真验证。

关键词: 架空线断线故障测量电压降落计算电压降落

DOI：10.7667/PSPC171552

分类号:

基金项目:国家自然科学基金项目(51477061)

A line break fault protection algorithm for high voltage overhead line based on two-terminal information

LU Zhengfei¹,CAI Yijun²,LIU Zijun¹,ZHU Kefan²,HU Ziheng¹,WANG Yuxi²,WEN Minghao²

(1. Shenzhen Power Supply Bureau Co., Ltd, Shenzhen 518001, China;2. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China)

Abstract:

Affected by external force and lightning strike, the high voltage overhead line is easy to be broken. But the current line protection device can only identify the line break fault accurately after the fault line landing. In view of the problem that there is no protection algorithm especially for line break fault, a novel protection based on two-terminal information is presented in this paper. According to the voltage and current information on both sides, the calculated voltage drop and the measured voltage drop of each phase line are calculated respectively. Then the line break fault is quickly and reliably determined by calculating the magnitude of the difference of the two voltage drops and the magnitude of the line current. Finally, the simulation results verify the effectiveness of the protection algorithm in PSCAD/EMTDC. This work is supported by National Natural Science Foundation of China (No. 51477061).

Key words: high voltage overhead line line break fault measured voltage drop calculated voltage drop

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