基于灰色关联的小电流接地选线研究  

Fault line detection for single-phase-to-earth faults based on improved grey relation analysis

作　　者：梁睿[1] 王崇林[1] 刘建华[1] 马草原[1] 张栋梁[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008

出　　处：《电力系统保护与控制》2009年第7期17-21,25,共6页Power System Protection and Control

基　　金：中国矿业大学青年科研基金(OC060996)

摘　　要：在分析了现有的小电流系统单相接地故障选择性保护的基础上,提出了一种基于灰色关联算法单相接地保护新原理。该方法利用在配电网单相接地故障时,故障支路的零序暂态电流和非故障支路的零序暂态电流的关联程度来判别故障支路和非故障支路,并给出了相关算法,并进行了相应的仿真计算,仿真和实际应用结果表明,基于该方法选择性接地保护计算量小,实现容易并具有很高的准确性,且适用中性点不同接地方式的配电网。After analyzing the single-phase-to-earth faults selective protection principle in present small current system, a novel principle that single-phase-to-earth fault based on improved gray relation analysis is presented in this paper. While single-phase-to-earth faults taking place in the distribution system, this method utilizes the zero sequence transient current relation degree of faulted branch and normal branch to analyse and distinguish faulted branch from normal branch. The corresponding simulation and experiment are also carried out as well as the corresponding algorithm. Simulation and practical application show that single-phase-to-earth faults selective protection principle based on the method has a less calculation, great exactness and it is easy to realized. It is also adaptive to any distribution system with different grounding patterns.

关 键 词：灰色关联 单相接地故障 选择性 中性点 配电网 保护 

分 类 号：TM862[电气工程—高电压与绝缘技术]