基于零序电流的风电场单相接地故障区段定位
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摘要
风电系统不同于常规输电系统,其集电线包含多段电缆,采用架空线—电缆混合输电形式,且距离大约为3～20 km。风电场35 kV中性点接地方式不同于常规配电网,其中性点采用曲折接线接地变压器。在混合线路中,由于各段线路行波速度不一致,用于均匀传输线的传统测距算法无法适用。提出基于零序电流的单相接地故障定位方法。研究了风电系统中性点接地方式,针对单相接地故障,提出采用比较暂态零序电流相似性的定位方法。通过仿真表明所提方法对于风电场适应性更强。
The wind power system is different from the conventional transmission system, and its collecting line contains multi sections of cable. The collecting line of wind farm adopts overhead line-power cable hybrid transmission form, and its distance is about 3～20 km. Wind farm 35 kV neutral point grounding method is different from the conventional distribution network, and its neutral point adopts the winding grounding transformer. In hybrid transmission lines, due to the different velocities of traveling wave in power cable and overhead line, the traditional location algorithm for uniform transmission line is not suitable. A new method of single-phase to grounding fault location based on zero-sequence current is put forward. The neutral point grounding method of wind power system is studied, and the method of comparing zero-sequence current similarity is put forward for the single-phase grounding fault. The simulation shows that the proposed method is more adaptable to wind farms.
The wind power system is different from the conventional transmission system, and its collecting line contains multi sections of cable. The collecting line of wind farm adopts overhead line-power cable hybrid transmission form, and its distance is about 3～20 km. Wind farm 35 kV neutral point grounding method is different from the conventional distribution network, and its neutral point adopts the winding grounding transformer. In hybrid transmission lines, due to the different velocities of traveling wave in power cable and overhead line, the traditional location algorithm for uniform transmission line is not suitable. A new method of single-phase to grounding fault location based on zero-sequence current is put forward. The neutral point grounding method of wind power system is studied, and the method of comparing zero-sequence current similarity is put forward for the single-phase grounding fault. The simulation shows that the proposed method is more adaptable to wind farms.
引文
[1]张丽英,叶廷路,辛耀中,等.大规模风电接入电网的相关问题及措施[J].中国电机工程学报,2010,30(25):1-9.Zhang Liying,Ye Tinglu,Xin Yaozhong,et al.Problems and Measures of Power Grid Accommodating Large Scale Wind Power[J].Proceedings of the CSEE,2010,30(25):1-9.
[2]朱子坤,黄龙,叶睆,等.一种无需参数整定的混合线路故障行波定位方法[J].电测与仪表,2016,53(19):108-112.Zhu Zikun,Huang Long,Ye Huan,et al.A novel traveling wave based fault location method with non-parameter-threshold-setting for hybrid power lines[J].Electrical Measurement&Instrumentation,2016,53(19):108-112.
[3]毛晓明,刘沛,程时杰.利用单侧电量的高压输电线路故障测距算法研究[J].电网技术,1998,22(11):15-17.Mao Xiaoming,Liu Pei,Cheng Shijie.Algorithm forhigh voltage transmission line fault location using one terminal voltage and current[J].Power System Technology,1998,22(11):15-17.
[4]高艳丰,朱永利,闫红艳,等.基于SRC和LCD的行波检测故障定位方法[J].系统仿真学报,2016,28(5):1225-1231,1241.Gao Yanfeng,Zhu Yongli,Yan Hongyan,et al.Traveling Wave Detection Fault Location Method Based on SRCand LCD[J].Journal of System Simulation,2016,28(5):1225-1231,1241.
[5]董新洲,葛耀中,徐丙垠.利用暂态电流行波的输电线路故障测距研究[J].中国电机工程学报,1999,19(4):76-80.Dong Xinzhou,Ge Yaozhong,Xu Bingyin.Research of Fault Location Based on Current Travelling Waves[J].Proceeding of the CSEE,1999,19(4):76-80.
[6]高艳丰,朱永利,闫红艳,等.基于改进双端法的输电线路行波故障定位[J].电测与仪表,2015,52(1):41-46,52.GaoYanfeng,Zhu Yongli,Yan Hongyan,et al.Traveling waves fault location of transmission lines based on improved double-end method[J].Electrical Measurement&Instrumentation,2015,52(1):41-46,52.
[7]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.
[8]李博通,李永丽,胡宇,等.基于故障区域识别的超高压混联线路故障测距算法[J].电力系统自动化,2013,37(5):93-98.Li Botong,Li Yongli,Hu Yu,et al.A new fault location algorithm for extra-high voltage mixed lines based on fault zone identification[J].Automation of Electric Power Systems,2013,37(5):93-98.
[9]束洪春,高峰,陈学允,等.T型输电系统故障测距算法研究[J].中国电机工程学报,1998,18(6):416-420.Shu Hongchun,Gao Feng,Chen Xueyun,et al.A study on accurate fault location algorithm of EHV T-connection to three terminals[J].Proceedings of the CSEE,1998,18(6):416-420.
[10]施世鸿,何奔腾,张武军.T型高压输电线路故障测距[J].中国电机工程学报,2008,28(25):105-110.Shi Shihong,He Benteng,Zhang Wujun.Fault location for HV three-terminal transmission lines[J].Proceedings of the CSEE,2008,28(25):105-110.
[11]林富洪,王增平,曾惠敏.基于测距函数相位特性的T型高压线路故障定位原理[J].中国电机工程学报,2011,31(13):107-113.Lin Fuhong,Wang Zengping,Zeng Huimin.A novel fault location algorithm based on phase characteristics of fault location function for three-terminal transmission lines[J].Proceedings of the CSEE,2011,31(13):107-113.
[12]高艳丰,朱永利,闫红艳,等.基于VMD和TEO的高压输电线路雷击故障测距研究[J].电工技术学报,2016,31(1):24-33.Gao Yanfeng,Zhu Yongli,Yan Hongyan,et al.Study on Lighting Fault Locating of High-voltage Transmission Lines Based on VMD and TEO[J].Transactions of China Electrotechnical Society,2016,31(1):24-33.
[13]李冰,覃剑,雷林绪,等.基于小波变换技术的混合电流电压行波测距系统750 kV输电工程中的应[J].电力设备,2006,7(6):25-27.Li Bing,Qin Jian,Lei Linxu,et al.Application of fault range finding system with mixed travelling wave of current and voltage based on wavelet transformation technology in 750 kV power transmission project[J].Electrical Equipment,2006,7(6):25-27.
[14]姜宪国,李博通,张云柯,等.基于电压序量变化量的超高压混合线路故障测距方法[J].电网技术,2015,39(12):3578-3583.Jiang Xianguo,Li Botong,Zhang Yunke,et al.A Fault Location Method for Extra-High Voltage Mixed Lines Based on Variation of Sequence Voltage[J].Power System Technology,2015,39(12):3578-3583.
[15]薛永端,李乐,俞恩科,等.基于分段补偿原理的电缆架空线混合线路双端行波故障测距算法[J].电网技术,2014,38(7):1953-1958.Xue Yongduan,Li Le,Yu Entai,et al.A Sectionalized Compensation Based Two-Terminal Traveling Wave Fault Location Algorithm for Hybrid Transmission Line Composed of Power Cable and Overhead Line[J].Power System Technology,2014,38(7):1953-1958.
[16]李润先.中压电网系统接地实用技术[M].北京:中国电力出版社,2001.Li Runxian.Medium voltage network system grounding practical technology[M].Beijing:China Electric Power Press,2001.
[17]王所钺.基于双馈风电机组的短路电流计算方法[D].济南:山东大学,2015.Wang Suoyue.Short-Circuit Current Calculation Method based on Doubly-Fed Induction Generator[D].Jinan:Shandong University,2015.
[18]王晨清,宋国兵,迟永宁,等.风电系统故障特征分析[J].电力系统自动化,2015(21):52-58.Wang Chenqing,Song Guobing,Chi Yongning,et al.Fault Characteristics Analysis of Wind Power System[J].Automation of Electric Power Systems,2015(21):52-58.
[19]马士聪,徐丙垠,高厚磊,等.检测暂态零模电流相关性的小电流接地故障定位方法[J].电力系统自动化,2008(7):48-52.Ma Shicong,Xu Bingyin,Gao Houlei,et al.An Earth Fault Locating Method in Feeder Automation System by Examining Correlation of Transient Zero Mode Currents[J].Electric Power Automation Equipment,2008(7):48-52.
[2]朱子坤,黄龙,叶睆,等.一种无需参数整定的混合线路故障行波定位方法[J].电测与仪表,2016,53(19):108-112.Zhu Zikun,Huang Long,Ye Huan,et al.A novel traveling wave based fault location method with non-parameter-threshold-setting for hybrid power lines[J].Electrical Measurement&Instrumentation,2016,53(19):108-112.
[3]毛晓明,刘沛,程时杰.利用单侧电量的高压输电线路故障测距算法研究[J].电网技术,1998,22(11):15-17.Mao Xiaoming,Liu Pei,Cheng Shijie.Algorithm forhigh voltage transmission line fault location using one terminal voltage and current[J].Power System Technology,1998,22(11):15-17.
[4]高艳丰,朱永利,闫红艳,等.基于SRC和LCD的行波检测故障定位方法[J].系统仿真学报,2016,28(5):1225-1231,1241.Gao Yanfeng,Zhu Yongli,Yan Hongyan,et al.Traveling Wave Detection Fault Location Method Based on SRCand LCD[J].Journal of System Simulation,2016,28(5):1225-1231,1241.
[5]董新洲,葛耀中,徐丙垠.利用暂态电流行波的输电线路故障测距研究[J].中国电机工程学报,1999,19(4):76-80.Dong Xinzhou,Ge Yaozhong,Xu Bingyin.Research of Fault Location Based on Current Travelling Waves[J].Proceeding of the CSEE,1999,19(4):76-80.
[6]高艳丰,朱永利,闫红艳,等.基于改进双端法的输电线路行波故障定位[J].电测与仪表,2015,52(1):41-46,52.GaoYanfeng,Zhu Yongli,Yan Hongyan,et al.Traveling waves fault location of transmission lines based on improved double-end method[J].Electrical Measurement&Instrumentation,2015,52(1):41-46,52.
[7]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.
[8]李博通,李永丽,胡宇,等.基于故障区域识别的超高压混联线路故障测距算法[J].电力系统自动化,2013,37(5):93-98.Li Botong,Li Yongli,Hu Yu,et al.A new fault location algorithm for extra-high voltage mixed lines based on fault zone identification[J].Automation of Electric Power Systems,2013,37(5):93-98.
[9]束洪春,高峰,陈学允,等.T型输电系统故障测距算法研究[J].中国电机工程学报,1998,18(6):416-420.Shu Hongchun,Gao Feng,Chen Xueyun,et al.A study on accurate fault location algorithm of EHV T-connection to three terminals[J].Proceedings of the CSEE,1998,18(6):416-420.
[10]施世鸿,何奔腾,张武军.T型高压输电线路故障测距[J].中国电机工程学报,2008,28(25):105-110.Shi Shihong,He Benteng,Zhang Wujun.Fault location for HV three-terminal transmission lines[J].Proceedings of the CSEE,2008,28(25):105-110.
[11]林富洪,王增平,曾惠敏.基于测距函数相位特性的T型高压线路故障定位原理[J].中国电机工程学报,2011,31(13):107-113.Lin Fuhong,Wang Zengping,Zeng Huimin.A novel fault location algorithm based on phase characteristics of fault location function for three-terminal transmission lines[J].Proceedings of the CSEE,2011,31(13):107-113.
[12]高艳丰,朱永利,闫红艳,等.基于VMD和TEO的高压输电线路雷击故障测距研究[J].电工技术学报,2016,31(1):24-33.Gao Yanfeng,Zhu Yongli,Yan Hongyan,et al.Study on Lighting Fault Locating of High-voltage Transmission Lines Based on VMD and TEO[J].Transactions of China Electrotechnical Society,2016,31(1):24-33.
[13]李冰,覃剑,雷林绪,等.基于小波变换技术的混合电流电压行波测距系统750 kV输电工程中的应[J].电力设备,2006,7(6):25-27.Li Bing,Qin Jian,Lei Linxu,et al.Application of fault range finding system with mixed travelling wave of current and voltage based on wavelet transformation technology in 750 kV power transmission project[J].Electrical Equipment,2006,7(6):25-27.
[14]姜宪国,李博通,张云柯,等.基于电压序量变化量的超高压混合线路故障测距方法[J].电网技术,2015,39(12):3578-3583.Jiang Xianguo,Li Botong,Zhang Yunke,et al.A Fault Location Method for Extra-High Voltage Mixed Lines Based on Variation of Sequence Voltage[J].Power System Technology,2015,39(12):3578-3583.
[15]薛永端,李乐,俞恩科,等.基于分段补偿原理的电缆架空线混合线路双端行波故障测距算法[J].电网技术,2014,38(7):1953-1958.Xue Yongduan,Li Le,Yu Entai,et al.A Sectionalized Compensation Based Two-Terminal Traveling Wave Fault Location Algorithm for Hybrid Transmission Line Composed of Power Cable and Overhead Line[J].Power System Technology,2014,38(7):1953-1958.
[16]李润先.中压电网系统接地实用技术[M].北京:中国电力出版社,2001.Li Runxian.Medium voltage network system grounding practical technology[M].Beijing:China Electric Power Press,2001.
[17]王所钺.基于双馈风电机组的短路电流计算方法[D].济南:山东大学,2015.Wang Suoyue.Short-Circuit Current Calculation Method based on Doubly-Fed Induction Generator[D].Jinan:Shandong University,2015.
[18]王晨清,宋国兵,迟永宁,等.风电系统故障特征分析[J].电力系统自动化,2015(21):52-58.Wang Chenqing,Song Guobing,Chi Yongning,et al.Fault Characteristics Analysis of Wind Power System[J].Automation of Electric Power Systems,2015(21):52-58.
[19]马士聪,徐丙垠,高厚磊,等.检测暂态零模电流相关性的小电流接地故障定位方法[J].电力系统自动化,2008(7):48-52.Ma Shicong,Xu Bingyin,Gao Houlei,et al.An Earth Fault Locating Method in Feeder Automation System by Examining Correlation of Transient Zero Mode Currents[J].Electric Power Automation Equipment,2008(7):48-52.