基于多点联合检测的低压电网故障定位方法
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引用本文:王毅,梁栋辉,李松浓,叶君,郑可,万毅.基于多点联合检测的低压电网故障定位方法[J].南京邮电大学学报:自然科学版,2020,40(3):66~75
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作者单位
王毅 重庆邮电大学 通信与信息工程学院重庆400065国网重庆市电力公司电力科学研究院重庆401123国网重庆市电力公司博士后科研工作站重庆401123 
梁栋辉 重庆邮电大学 通信与信息工程学院重庆400065 
李松浓 国网重庆市电力公司电力科学研究院重庆401123 
叶君 国网重庆市电力公司电力科学研究院重庆401123 
郑可 国网重庆市电力公司电力科学研究院重庆401123 
万毅 重庆邮电大学 通信与信息工程学院重庆400065 
基金项目:国家电网公司科技项目、中国博士后科学基金(2015T80961)和重庆市自然科学基金(cstc2016jcyjA0214)资助项目
中文摘要:针对目前低压电网中缺乏有效故障定位方法的问题,提出了一种基于多点联合检测的低压电网故障定位方法。该方法以混沌反射法为基础,在低压电网中设置多个测试点,对电网进行实时监测,电网发生故障后,对比分析各个测试点的测试结果,根据最短路径原则确定每个测试点与故障点的最短距离,由最近的测试点的测量结果建立潜在故障分支集合,进而确定故障子网络,最后融合故障子网络中的多个信息源确定具体的故障分支,并通过最近的测试点确定具体故障位置。并在此基础上提出一种测距装置优化配置方法,以减少成本。simulink的仿真结果表示,该方法可以实现低压电网环境下快速、有效的故障定位,实现简单且相对误差仅为1.1%。
中文关键词:低压电网  故障定位  反射测量  故障子网络
 
Fault location method for low voltage distribution network based on multi point joint detection
Abstract:In view of the lack of effective fault location methods in low voltage distribution networks, a fault location method based on multi point joint detection is proposed. Based on the chaos reflection measurement method, multiple test points are set in the low voltage distribution network to monitor the power grids in real time. After a fault occurs in the power grids, the test results of each test point are compared and analyzed. The shortest distance between each test point and the fault point is determined by the shortest path principle. The potential fault branch set is established from the measurement results of the nearest test point, and then the fault subnetwork is determined. Finally, multiple information sources in the fault subnetwork are combined to determine the specific fault branch and pass the shortest test point to determine the specific fault location. Moreover, a method for optimizing the configuration of distance measuring equipment is proposed to reduce costs. Simulation results with Simulink show that the method can achieve a fast and effective fault location in low voltage distribution network environment. Thus, it is simple,easy to implement and the relative error is only 1.1%.
keywords:low voltage distribution networks  fault location  reflection measurement  fault subnetwork
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