基于冗余度参数估计的多分支混合线路故障定位方法
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摘要
为解决目前多分支混合配电线路的故障定位问题,提出一种基于冗余度参数估计的方法。应用终端同步信息构造冗余度传输方程组,基于统计学理论,采用参数估计求解传输方程组进行故障定位。利用行波信息构建故障分支判据,解决了T节点附近故障时的分支误判难题。该方法无需波速计算,且高效的信息利用度和参数估计理论在最大限度上减小了误差。此外,引入长度系数,解决了因线路弧垂效应导致的误差增大问题。通过PSCAD/EMTDC仿真验证了所提方法的可行性。
In order to solve fault location problem for multi-branch hybrid lines consisting of power cables and overhead lines in distribution networks, a fault location method based on redundancy parameter estimation is proposed. Terminal synchronization information is applied to establish transmission equation system with redundancy. Based on parameter estimation theory, the transmission equation system is solved to obtain fault location result. Using traveling wave information, a fault branch judgment model is constructed to solve the problem of branch misjudgment when fault occurs near T node. This method doesn't need wave velocity calculation and minimizes error because of its highly efficient information availability and parameter estimation theory. Introduction of length factor solves error amplification problem caused by line sag effect. PSCAD/EMTDC simulation results show feasibility of this method.
In order to solve fault location problem for multi-branch hybrid lines consisting of power cables and overhead lines in distribution networks, a fault location method based on redundancy parameter estimation is proposed. Terminal synchronization information is applied to establish transmission equation system with redundancy. Based on parameter estimation theory, the transmission equation system is solved to obtain fault location result. Using traveling wave information, a fault branch judgment model is constructed to solve the problem of branch misjudgment when fault occurs near T node. This method doesn't need wave velocity calculation and minimizes error because of its highly efficient information availability and parameter estimation theory. Introduction of length factor solves error amplification problem caused by line sag effect. PSCAD/EMTDC simulation results show feasibility of this method.
引文
[1]贾清泉,郑旭然,刘楚,等.基于故障方向测度的配电网故障区段定位方法[J].中国电机工程学报,2017,37(20):5933-5941.Jia Qingquan,Zheng Xuran,Liu Chu,et al.A method of fault section location in distribution networks based on fault direction measures[J].Proceedings of the CSEE,2017,37(20):5933-5941(in Chinese).
[2]Dong X,Wang J,Shi S,et al.Traveling wave based singlephase-to-ground protection method for power distribution system[J].CSEE Journal of Power&Energy Systems,2015,1(2):75-82.
[3]季涛,孙同景,徐丙垠,等.配电混合线路双端行波故障测距技术[J].中国电机工程学报,2006,26(12):89-94.Ji Tao,Sun Tongjing,Xu Bingyin,et al.Study on fault location of Distribution mixed feeders based on double terminal method of traveling waves[J].Proceedings of the CSEE,2006,26(12):89-94(in Chinese).
[4]和敬涵,季英业.小电流接地系统单相接地故障测距方法的研究[J].华北电力技术,2004(1):1-3.He Jinghan,Ji Yingye.Research of fault distance measure algorithm for nor-direct-ground neutral system[J].North China Electric Power,2004(1):1-3(in Chinese).
[5]唐学用,黄民翔,尹晓光,等.电缆-架空线混合输电线路故障测距方法研究[J].电力系统保护与控制,2011,39(14):69-73.Tang Xueyong,Huang Mingxiang,Ying Xiaoguang,et al.A study on fault locating methods based on hybrid transmission lines consisting of power cables and overhead lines[J].Power System Protection and Control,2011,39(14):69-73(in Chinese).
[6]王波,江全元,顾伟,等.一种适于多分支输电线路的故障定位新方法[J].电网技术,2013,37(4):1152-1158.Wang Bo,Jiang Quanyuan,Gu Wei,et al.A novel fault location method suitable for transmission line with multi branches[J].Power System Technology,2013,37(4):1152-1158(in Chinese).
[7]贾惠彬,李明舒,张国云.一种基于图论剪枝算法的多分支配电网行波故障定位算法[J].电测与仪表,2017,54(1):27-32.Jia Huibin,Li Mingshu,Zhang Guoyun.A traveling wave fault location method for distribution network based on pruning algorithm and graph theory[J].Electrical Measurement&Instrumentation,2017,54(1):27-32(in Chinese).
[8]张颖,周韧,钟凯.改进蚁群算法在复杂配电网故障区段定位中的应用[J].电网技术,2011,35(1):224-228.Zhang Ying,Zhou Ren,Zhong Kai.Application of improved ant colony algorithm in fault-section location of complex distribution network[J].Power System Technology,2011,35(1):224-228(in Chinese).
[9]索南加乐,张怿宁,齐军,等.基于参数识别的时域法双端故障测距原理[J].电网技术,2006,30(8):65-70.Suonan Jiale,Zhang Yining,Qi Jun,et al.Time domain fault location method based on transmission line parameter identification using two terminals data[J].Power System Technology,2006,30(8):65-70(in Chinese).
[10]孙雅明,吕航.Petri网和冗余纠错技术结合的配网故障区段定位新方法[J].中国电机工程学报,2004,24(10):61-67.Sun Yaming,LüHang.A new approach of the fault section locating for distribution systems based on Petri nets in combination with redundant correcting technique[J].Proceedings of the CSEE,2004,24(10):61-67(in Chinese).
[11]姜臻,苗世洪,刘沛.基于故障可观性的输电线路故障定位方法[J].电力系统保护与控制,2016,44(15):1-9.Jiang Zhen,Miao Shihong,Liu Pei.Fault observability model based fault location technique for transmission grids[J].Power System Protection and Control,2016,44(15):1-9(in Chinese).
[12]沈善德.电力系统辨识[M].北京:清华大学出版社,1993:79-132.
[13]崔浩,王丰华,穆卡,等.基于实际波速的多端输电线路行波故障测距方法[J].电工电能新技术,2017,36(2):74-80.Cui Hao,Wang Fenghua,Mu Ka,et al.Real-time velocity based fault location method of travelling wave for multi-terminal transmission lines[J].Advanced Technology of Electrical Engineering and Energy,2017,36(2):74-80(in Chinese).
[14]罗深增,李银红,陈博,等.计及PMU最优配置的输电线路广域自适应故障定位算法[J].中国电机工程学报,2016,36(15):4134-4143.Luo Shenzeng,Li Yinhong,Chen Bo,et al.An adaptive wide area fault location algorithm for transmission lines with optimal PMUplacement[J].Proceedings of the CSEE,2016,36(15):4134-4143(in Chinese).
[15]张宇,刘雨东,计钊.向量相似度测度方法[J].声学技术,2009,28(4):532-536.Zhang Yu,Liu Yudong,Ji Zhao.Vector similarity measurement method[J].Technical Acoustics,2009,28(4):532-536(in Chinese).
[2]Dong X,Wang J,Shi S,et al.Traveling wave based singlephase-to-ground protection method for power distribution system[J].CSEE Journal of Power&Energy Systems,2015,1(2):75-82.
[3]季涛,孙同景,徐丙垠,等.配电混合线路双端行波故障测距技术[J].中国电机工程学报,2006,26(12):89-94.Ji Tao,Sun Tongjing,Xu Bingyin,et al.Study on fault location of Distribution mixed feeders based on double terminal method of traveling waves[J].Proceedings of the CSEE,2006,26(12):89-94(in Chinese).
[4]和敬涵,季英业.小电流接地系统单相接地故障测距方法的研究[J].华北电力技术,2004(1):1-3.He Jinghan,Ji Yingye.Research of fault distance measure algorithm for nor-direct-ground neutral system[J].North China Electric Power,2004(1):1-3(in Chinese).
[5]唐学用,黄民翔,尹晓光,等.电缆-架空线混合输电线路故障测距方法研究[J].电力系统保护与控制,2011,39(14):69-73.Tang Xueyong,Huang Mingxiang,Ying Xiaoguang,et al.A study on fault locating methods based on hybrid transmission lines consisting of power cables and overhead lines[J].Power System Protection and Control,2011,39(14):69-73(in Chinese).
[6]王波,江全元,顾伟,等.一种适于多分支输电线路的故障定位新方法[J].电网技术,2013,37(4):1152-1158.Wang Bo,Jiang Quanyuan,Gu Wei,et al.A novel fault location method suitable for transmission line with multi branches[J].Power System Technology,2013,37(4):1152-1158(in Chinese).
[7]贾惠彬,李明舒,张国云.一种基于图论剪枝算法的多分支配电网行波故障定位算法[J].电测与仪表,2017,54(1):27-32.Jia Huibin,Li Mingshu,Zhang Guoyun.A traveling wave fault location method for distribution network based on pruning algorithm and graph theory[J].Electrical Measurement&Instrumentation,2017,54(1):27-32(in Chinese).
[8]张颖,周韧,钟凯.改进蚁群算法在复杂配电网故障区段定位中的应用[J].电网技术,2011,35(1):224-228.Zhang Ying,Zhou Ren,Zhong Kai.Application of improved ant colony algorithm in fault-section location of complex distribution network[J].Power System Technology,2011,35(1):224-228(in Chinese).
[9]索南加乐,张怿宁,齐军,等.基于参数识别的时域法双端故障测距原理[J].电网技术,2006,30(8):65-70.Suonan Jiale,Zhang Yining,Qi Jun,et al.Time domain fault location method based on transmission line parameter identification using two terminals data[J].Power System Technology,2006,30(8):65-70(in Chinese).
[10]孙雅明,吕航.Petri网和冗余纠错技术结合的配网故障区段定位新方法[J].中国电机工程学报,2004,24(10):61-67.Sun Yaming,LüHang.A new approach of the fault section locating for distribution systems based on Petri nets in combination with redundant correcting technique[J].Proceedings of the CSEE,2004,24(10):61-67(in Chinese).
[11]姜臻,苗世洪,刘沛.基于故障可观性的输电线路故障定位方法[J].电力系统保护与控制,2016,44(15):1-9.Jiang Zhen,Miao Shihong,Liu Pei.Fault observability model based fault location technique for transmission grids[J].Power System Protection and Control,2016,44(15):1-9(in Chinese).
[12]沈善德.电力系统辨识[M].北京:清华大学出版社,1993:79-132.
[13]崔浩,王丰华,穆卡,等.基于实际波速的多端输电线路行波故障测距方法[J].电工电能新技术,2017,36(2):74-80.Cui Hao,Wang Fenghua,Mu Ka,et al.Real-time velocity based fault location method of travelling wave for multi-terminal transmission lines[J].Advanced Technology of Electrical Engineering and Energy,2017,36(2):74-80(in Chinese).
[14]罗深增,李银红,陈博,等.计及PMU最优配置的输电线路广域自适应故障定位算法[J].中国电机工程学报,2016,36(15):4134-4143.Luo Shenzeng,Li Yinhong,Chen Bo,et al.An adaptive wide area fault location algorithm for transmission lines with optimal PMUplacement[J].Proceedings of the CSEE,2016,36(15):4134-4143(in Chinese).
[15]张宇,刘雨东,计钊.向量相似度测度方法[J].声学技术,2009,28(4):532-536.Zhang Yu,Liu Yudong,Ji Zhao.Vector similarity measurement method[J].Technical Acoustics,2009,28(4):532-536(in Chinese).