基于FTU的闭式配电网故障测距研究
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摘要
为解决闭式配电网多电源交叉支路单相接地故障的准确测距难题,提出了利用与故障支路相邻的多端FTU信息的故障测距方法。该方法基于图论理论形成配电网拓扑结构的故障信息矩阵,得到交叉区段的故障判据,解决故障定段的误判问题,实现故障区段快速准确判定;利用两端电源接地回路有向图拓扑结构的电路特性,抵消故障点接地电阻对故障测距的影响,提高故障定位的准确性。该方法充分利用现有的FTU设备,不需要额外增加辅助设备投资,排除了其引入环节带来的误差,能够适用于复杂配电网络。利用11节点配电网络对提出的方法进行仿真,验证了该方法的有效性和准确性。
In order to solve the problem of accurate fault location of single-phase ground fault in the closed distribution network with multiple power and cross branch, the fault location method based on the information from the multi-terminal FTU that is adjacent to the fault branch is proposed. The method is based on the theory of graph theory to form the fault information matrix of the distribution network topology that gets the fault criterion of the cross branch to solve the problem of false judgement in fault location. The fault section can be quickly and accurately determined in the complex network. According to the circuit characteristics of the directed graph topological structure of the ground loop of both ends of power, the effect of the grounding resistance at fault point on fault location can be neutralized, therefore the accuracy of fault location would be improved. This method takes full advantage of the existing FTU equipment, so there is no need to increase additional equipment investment, additionally, it can eliminate the error caused by other introduced links and be applied to complex distribution network. The proposed method is simulated by 11 node distribution network,and the validity and accuracy of the method are verified.
In order to solve the problem of accurate fault location of single-phase ground fault in the closed distribution network with multiple power and cross branch, the fault location method based on the information from the multi-terminal FTU that is adjacent to the fault branch is proposed. The method is based on the theory of graph theory to form the fault information matrix of the distribution network topology that gets the fault criterion of the cross branch to solve the problem of false judgement in fault location. The fault section can be quickly and accurately determined in the complex network. According to the circuit characteristics of the directed graph topological structure of the ground loop of both ends of power, the effect of the grounding resistance at fault point on fault location can be neutralized, therefore the accuracy of fault location would be improved. This method takes full advantage of the existing FTU equipment, so there is no need to increase additional equipment investment, additionally, it can eliminate the error caused by other introduced links and be applied to complex distribution network. The proposed method is simulated by 11 node distribution network,and the validity and accuracy of the method are verified.
引文
[1]唐金锐,尹项根,张哲,等.配电网故障自动定位技术研究综述[J].电力自动化设备,2013,33(5):7-13.Tang J R,Yin X G,Zhang Z,et al.Survey of Fault Location Technology for Distribution Networks[J].Electric Power Automation Equipment,2013,33(5):7-13.
[2]张慧芬.配电网单相接地故障检测技术研究[D].山东:山东大学,2006.Zhang H F.Study on Earth Fault Detection in Distribution Network[D].Shandong,Shandong University,2006.
[3]吴杰,王政.基于FTU的小电流接地系统故障定位方法再研究[J].继电器,2004,32(22):29-34.Wu J,Wang Z.Reinvestigation for Aproaches to Fault Location Based on FTU in Power System with Neutral Unearthed[J].Relay,2004,32(22):29-34.
[4]杜刚,刘迅,苏高峰.基于FTU和“S”信号注入法的配电网接地故障定位技术的研究[J].电力系统保护与控制,2010,38(12):73-76.Du G,Liu X,Su G F.Research on Technology of Grounding Fault Location Combining FTU and“S”Signal Injecting Method in Distributiom Grid[J].Power System Protection and Control,2010,38(12):73-76.
[5]徐建军,韩晓菲,沙宝良,等.基于FTU和行波法的配电网接地故障定位技术的研究[J].化工自动化及仪表,2011,38(4):408-412.Xu Jian-jun,Han Xiao-fei,Sha Bao-liang,et al.FTU and Traveling Wave-based Grounding Fault Location Technology for Power Distribution Networks[J].Control and Instruments In Chemical Industry,2011,38(4):408-412.
[6]梅念,石东源,杨增力,等.一种实用的复杂配电网故障定位的矩阵算法[J].电力系统自动化,2007,31(10):66-70.Mei N,Shi D Y,Yang Z L,et al.A Practical Matrix-based Fault Location Algorithm for Complex Distribution Network[J].Automation of Electric Power Systems,2007,31(10):66-70.
[7]胡福年,孙守娟.基于图论的矩阵算法在配电网故障定位中的应用[J].中国电力,2016,49(3):94-98.Hu F N,Sun S J.Fault Location of Distribution Network by Applying Matrix Algorithm Based on Graph Theory[J].Electric Power,2016,49(3):94-98.
[8]贾惠彬,钱翰博,戚宇林.一种配电网单相接地故障行波定位方法[J].电力系统保护与控制,2012,40(23):93-97.Jia H B,Qian H B,Qi Y L,.Traveling-wave Location for the Single Phase Grounding Fault of Distribution Network[J].Power System Protection and Control,2012,40(23):93-97.
[9]刘朕志,舒勤,韩晓言,等.基于行波模量速度差的配电网故障测距迭代算法[J].电力系统保护与控制,2015,43(8):88-93.Liu Z Z,Shu Q,Han X Y,et al.An Iterative Fault Location Algorithm using the Difference of Wave Velocity Between Zero Mode Component and Aerial Mode Component of Traveling Wave[J].Power System Protection and Control,2015,43(8):88-89.
[10]宁一,王大志,等.基于零模行波波速特性的配电网单相接地故障测距方法[J].中国电机工程学报,2015,33:93-98.Ning Y,Wang D Z,et al.A Single Phase-to-ground Fault Location Scheme for Distribution Networks Based on Zero-mode Traveling Wave Velocity Property[J].Proceedings of the CSEE,2015,33:93-98.
[11]唐金锐.电力线路在线巡视监测及故障精确定位的研究[D].湖北,华中科技大学,2014.Tang J R.Research on On-line Inspection and Accurate Fault Location Methods for Power Lines[D].Hubei,Huazhong University of Science and Technology,2014.
[12]任琴,舒勤,刘勇.基于对称注入法反射波特征提取的配电网故障测距算法[J].电力系统保护与控制,2015,43(24):19-25.Ren Q,Shu Q,Liu Y.A Fault Location Algorithm for Distribution Network Based on Extracting Features from the Reflected Wave of Symmetrical Injection Method[J].Power System Protection and Control,2015,43(24):19-25.
[13]杨荦源,舒勤.基于线模行波突变的配电网全架空线路单相接地的多端检测定位新方法[J].电力系统保护与控制,2016,44(9):22-28.Yang L Y,Shu Q.A New Multiterminal Detecting Location Method of Single-phase Grounding to the Overhead-line for Distribution Network based on Travelling-wave Mutation of Line-mode[J].Power System Protection and Control,2016,44(9):22-28.
[14]董爱华,李志超,闵天文,等.基于多个测量点的高压输电线路故障定位新方法[J].控制工程,2016,23(3):411-416.Dong A H,Li Z C,Min T W,et al.Power Line Fault Localization New Method Based on Multiple Measurement Points[J].Control Engineering of China,2016,23(3):411-416.
[15]马士聪,高厚磊,徐丙垠,等.配电网故障定位技术综述[J].电力系统保护与控制,2009,37(11):119-124.MA S C,GAO H L,XU B Y,et al.A Survey of Fault Location Methods in Distribution Network[J].Power System Protection and Control,2009,37(11):119-124.
[16]刘亚男.配电网单相接地故障综合定位方法的研究[D].北京,华北电力大学,2013.LIU Y N.Research on the Location Synthesis Method of Single Phase Grounding Fault for Distribution Network[D].Beijing,North China Electric Power University,2013.
[17]郑秀玉,丁坚勇,黄娜,等.输电线路单端故障定位的阻抗-行波组合算法[J].电力系统保护与控制,2010,38(6):18-21.Zheng X Y,Ding J Y,Huang N,et al.Impedance-traveling Wave Assembled Algorithm of One-terminal Fault Location for Transmission Lines[J].Power System Protection and Control,2010,38(6):18-21.
[2]张慧芬.配电网单相接地故障检测技术研究[D].山东:山东大学,2006.Zhang H F.Study on Earth Fault Detection in Distribution Network[D].Shandong,Shandong University,2006.
[3]吴杰,王政.基于FTU的小电流接地系统故障定位方法再研究[J].继电器,2004,32(22):29-34.Wu J,Wang Z.Reinvestigation for Aproaches to Fault Location Based on FTU in Power System with Neutral Unearthed[J].Relay,2004,32(22):29-34.
[4]杜刚,刘迅,苏高峰.基于FTU和“S”信号注入法的配电网接地故障定位技术的研究[J].电力系统保护与控制,2010,38(12):73-76.Du G,Liu X,Su G F.Research on Technology of Grounding Fault Location Combining FTU and“S”Signal Injecting Method in Distributiom Grid[J].Power System Protection and Control,2010,38(12):73-76.
[5]徐建军,韩晓菲,沙宝良,等.基于FTU和行波法的配电网接地故障定位技术的研究[J].化工自动化及仪表,2011,38(4):408-412.Xu Jian-jun,Han Xiao-fei,Sha Bao-liang,et al.FTU and Traveling Wave-based Grounding Fault Location Technology for Power Distribution Networks[J].Control and Instruments In Chemical Industry,2011,38(4):408-412.
[6]梅念,石东源,杨增力,等.一种实用的复杂配电网故障定位的矩阵算法[J].电力系统自动化,2007,31(10):66-70.Mei N,Shi D Y,Yang Z L,et al.A Practical Matrix-based Fault Location Algorithm for Complex Distribution Network[J].Automation of Electric Power Systems,2007,31(10):66-70.
[7]胡福年,孙守娟.基于图论的矩阵算法在配电网故障定位中的应用[J].中国电力,2016,49(3):94-98.Hu F N,Sun S J.Fault Location of Distribution Network by Applying Matrix Algorithm Based on Graph Theory[J].Electric Power,2016,49(3):94-98.
[8]贾惠彬,钱翰博,戚宇林.一种配电网单相接地故障行波定位方法[J].电力系统保护与控制,2012,40(23):93-97.Jia H B,Qian H B,Qi Y L,.Traveling-wave Location for the Single Phase Grounding Fault of Distribution Network[J].Power System Protection and Control,2012,40(23):93-97.
[9]刘朕志,舒勤,韩晓言,等.基于行波模量速度差的配电网故障测距迭代算法[J].电力系统保护与控制,2015,43(8):88-93.Liu Z Z,Shu Q,Han X Y,et al.An Iterative Fault Location Algorithm using the Difference of Wave Velocity Between Zero Mode Component and Aerial Mode Component of Traveling Wave[J].Power System Protection and Control,2015,43(8):88-89.
[10]宁一,王大志,等.基于零模行波波速特性的配电网单相接地故障测距方法[J].中国电机工程学报,2015,33:93-98.Ning Y,Wang D Z,et al.A Single Phase-to-ground Fault Location Scheme for Distribution Networks Based on Zero-mode Traveling Wave Velocity Property[J].Proceedings of the CSEE,2015,33:93-98.
[11]唐金锐.电力线路在线巡视监测及故障精确定位的研究[D].湖北,华中科技大学,2014.Tang J R.Research on On-line Inspection and Accurate Fault Location Methods for Power Lines[D].Hubei,Huazhong University of Science and Technology,2014.
[12]任琴,舒勤,刘勇.基于对称注入法反射波特征提取的配电网故障测距算法[J].电力系统保护与控制,2015,43(24):19-25.Ren Q,Shu Q,Liu Y.A Fault Location Algorithm for Distribution Network Based on Extracting Features from the Reflected Wave of Symmetrical Injection Method[J].Power System Protection and Control,2015,43(24):19-25.
[13]杨荦源,舒勤.基于线模行波突变的配电网全架空线路单相接地的多端检测定位新方法[J].电力系统保护与控制,2016,44(9):22-28.Yang L Y,Shu Q.A New Multiterminal Detecting Location Method of Single-phase Grounding to the Overhead-line for Distribution Network based on Travelling-wave Mutation of Line-mode[J].Power System Protection and Control,2016,44(9):22-28.
[14]董爱华,李志超,闵天文,等.基于多个测量点的高压输电线路故障定位新方法[J].控制工程,2016,23(3):411-416.Dong A H,Li Z C,Min T W,et al.Power Line Fault Localization New Method Based on Multiple Measurement Points[J].Control Engineering of China,2016,23(3):411-416.
[15]马士聪,高厚磊,徐丙垠,等.配电网故障定位技术综述[J].电力系统保护与控制,2009,37(11):119-124.MA S C,GAO H L,XU B Y,et al.A Survey of Fault Location Methods in Distribution Network[J].Power System Protection and Control,2009,37(11):119-124.
[16]刘亚男.配电网单相接地故障综合定位方法的研究[D].北京,华北电力大学,2013.LIU Y N.Research on the Location Synthesis Method of Single Phase Grounding Fault for Distribution Network[D].Beijing,North China Electric Power University,2013.
[17]郑秀玉,丁坚勇,黄娜,等.输电线路单端故障定位的阻抗-行波组合算法[J].电力系统保护与控制,2010,38(6):18-21.Zheng X Y,Ding J Y,Huang N,et al.Impedance-traveling Wave Assembled Algorithm of One-terminal Fault Location for Transmission Lines[J].Power System Protection and Control,2010,38(6):18-21.