基于关联变电站信息的断路器失灵保护技术研究

李宝伟; 倪传坤; 文明浩; 李勇; 李文正

引用本文:	李宝伟,倪传坤,文明浩,等.基于关联变电站信息的断路器失灵保护技术研究[J].电力系统保护与控制,2019,47(14):173-178.
	LI Baowei,NI Chuankun,WEN Minghao,et al.Research on breaker failure protection based on associated substation information[J].Power System Protection and Control,2019,47(14):173-178

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基于关联变电站信息的断路器失灵保护技术研究
李宝伟^1,2,倪传坤²,文明浩¹,李勇³,李文正²
(1.华中科技大学强电磁工程与新技术国家重点实验室，湖北武汉 430074; 2.许继集团有限公司, 河南许昌 461000;3.国网华中分部，湖北武汉 430077)

摘要:

阐述了目前断路器失灵保护的基本原理，分析了影响失灵保护动作延时的主要因素。提出了一种基于关联变电站信息的断路器失灵保护及死区保护技术方案。该方案利用与失灵断路器相邻的非故障区域断路器CT构成电流差动保护判据，满足动作条件后跳开与失灵断路器相邻的断路器，实现故障的清除。该方案不受CT拖尾和饱和的影响，大幅缩短了失灵保护动作时间，并且可实现免整定。工程实施采用主子机方式的可扩展架构设计，工程配置灵活。同时保护采样同步不依赖外部对时信号，可靠性高，易于实现，有广泛推广的现实意义。

关键词: 失灵保护死区保护电流差动保护站域保护采样同步

DOI：10.7667/PSPC20191422

分类号:

基金项目:国家自然科学基金项目资助(51477061);国家电网公司科技项目资助“基于全域信息的失灵保护和自适应重合闸技术研究”;河南省科技研发专项经费项目资助(184100510023)

Research on breaker failure protection based on associated substation information

LI Baowei^1,2,NI Chuankun²,WEN Minghao¹,LI Yong³,LI Wenzheng²

(1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;2. XJ Group Corporation, Xuchang 461000, China;3. Central China Branch of State Grid Corporation of China, Wuhan 430077, China)

Abstract:

This paper first describes the basic principle of breaker failure protection, and analyzes the main factors affecting the delay of breaker failure protection. A technical scheme of breaker failure protection and dead-zone protection based on associated substation information is proposed. This scheme forms a current differential protection criterion by utilizing the non-faulty area circuit breaker CT which is adjacent to failure breaker. After the criteria of incomplete current differential protection are satisfied, the related circuit breaker is tripped to isolate the fault. This scheme is not affected by CT tailing and saturation, which greatly shortens the delay of failure protection and realizes the free protective setting. The implementation of the project adopts an expandable architecture designed with master slave mode, which is flexible in engineering configuration. Meanwhile, the protection sampling synchronization does not rely on external timing signals. This scheme has high reliability and is easy to carry out, so it has the practical significance of widespread promotion. This work is supported by National Natural Science Foundation of China (No. 51477061), Science and Technology Project of State Grid Corporation of China “Research on Failure Protection and Adaptive Reclosing Technology based on Whole Domain Information”, and Henan Province Distinguished Youth Scholars Foundation of China (No. 184100510023).

Key words: breaker failure protection dead-zone protection current differential protection substation-area protection synchronous sampling

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