引用本文:冉伊,周步祥,杨植雅,等.一种估算对侧信息的配电网单端故障测距方法[J].电力系统保护与控制,2014,42(18):25-31.
RAN Yi,ZHOU Bu-xiang,YANG Zhi-ya,et al.A method of single ended fault location for distribution network based on estimated contralateral information[J].Power System Protection and Control,2014,42(18):25-31
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一种估算对侧信息的配电网单端故障测距方法
冉伊1, 周步祥1, 杨植雅1, 唐辰旭2, 王鹏3
1.四川大学电气信息学院，四川 成都 610065;2.国网四川省电力公司德阳供电公司，四川 德阳 618000;3.广州供电局，广东 广州 510000
摘要:
提出了一种估算对侧信息的配电网单端故障测距方法。该方法基于线路的分布参数时域模型及0、1、2模网络，根据首端的采样信息，先推算故障端口的模电压及首端流入故障支路的模电流，并由故障端口的模电压估算末端的电压电流信息，进而得到末端流入故障支路的模电流。利用故障支路的0、1、2模电流瞬时值相等的边界条件，建立了测距函数，并通过搜索法求解，实现了故障测距。所提出的算法可同时利用故障后的稳态量及暂态量进行测距计算，且仅需采样单端信息，不受配网分支、过渡电阻、故障点位置及中性点运行方式等因素的影响。大量的EMTP数字
关键词:  单端  对侧信息  时域模型  边界条件  配电网故障测距
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A method of single ended fault location for distribution network based on estimated contralateral information
RAN Yi1, ZHOU Bu-xiang1, YANG Zhi-ya1, TANG Chen-xu2, WANG Peng3
1.School of Electrical Engineering and Information, Sichuan University, Chengdu 610065, China;2.State Grid Sichuan Electric Power Co. Deyang Power Supply Company, Deyang 618000, China;3.Guangzhou Power Supply Bureau, Guangzhou 510000, China
Abstract:
This paper presents a method of single ended fault location for distribution network based on estimated contralateral information. This method is based on time-domain distributed parameter line model and 0, 1, 2-mode network, according to the head-end sampling information, firstly calculates mode voltage of the failed port and mode current which flows from the first end to the fault branch, then estimates the voltage and current information of the end by the mode voltage of the failed port, and then gets the mode current which flows from the end to the fault branch, establishes ranging function by using the boundary condition about the fault branch 0, 1, 2-mode current equal to the instantaneous value, and through the search method, finally achieves fault location. The proposed algorithm can take advantage of both transient and steady state volumes after a fault for distance caculation by requiring only a single ended of sampling information, and unaffected by distribution network branch, transition resistance, fault location and the neutral point operation mode and other factors. A large number of EMTP simulation results show that the algorithm is accurate and applicable.
Key words:  single ended  contralateral information  time-domain model  boundary condition  distribution network fault location
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