基于VMD和S变换的多端输电线路故障定位
|
摘要
针对强噪声背景下行波信号提取难的现状,提出一种基于变分模态分解VMD(variational mode decomposi?tion)算法和S变换的故障行波提取法。通过对故障行波信号进行VMD分解,利用S变换分析得到故障突变点来确定故障行波达到时刻。针对行波波速和线路长度的不确定性,利用故障行波的传输过程和零线模分量,提出一种与波速无关的双端定位算法。基于故障前线路距离差值和故障后线路距离差值建立故障分支判定矩阵,提出一种适用于多端输电线路的故障定位方法,利用故障支路端的列元素计算故障位置。仿真结果验证所提方法在强噪声干扰下能有效提取行波信号,故障定位算法相比现有多端输电线路故障定位法有明显优势,进一步提高了定位精度。
Considering that the traveling wave signal with strong noises is difficult to extract,a fault traveling wave extraction method based on variational mode decomposition(VMD)and S transform is proposed.The fault traveling wave signal is decomposed by VMD,then the fault break point is obtained by S transform to determine the arriving time of fault traveling wave.In light of the uncertainties of fault traveling wave velocity and line length,a two-terminal location method is proposed based on the transmission process of fault traveling wave and zero line mode component,which is not affected by the traveling wave velocity.Based on the differences in line distance before and after fault,a fault branch determination matrix is established;the corresponding determination principle is proposed,and the fault location is calculated by using the column elements of the fault branch terminal.Simulation results show that the method proposed in this paper can effectively extract the traveling wave signal with strong noise interference;compared with the existing fault location method for multi-terminal transmission lines,the proposed fault location method has obvious advantages,which further improves the location accuracy.
Considering that the traveling wave signal with strong noises is difficult to extract,a fault traveling wave extraction method based on variational mode decomposition(VMD)and S transform is proposed.The fault traveling wave signal is decomposed by VMD,then the fault break point is obtained by S transform to determine the arriving time of fault traveling wave.In light of the uncertainties of fault traveling wave velocity and line length,a two-terminal location method is proposed based on the transmission process of fault traveling wave and zero line mode component,which is not affected by the traveling wave velocity.Based on the differences in line distance before and after fault,a fault branch determination matrix is established;the corresponding determination principle is proposed,and the fault location is calculated by using the column elements of the fault branch terminal.Simulation results show that the method proposed in this paper can effectively extract the traveling wave signal with strong noise interference;compared with the existing fault location method for multi-terminal transmission lines,the proposed fault location method has obvious advantages,which further improves the location accuracy.
引文
[1]崔浩,王丰华,穆卡,等(Cui Hao,Wang Fenghua,Mu Ka,et al).基于实际波速的多端输电线路行波故障测距方法(Real-time velocity based fault location method of travelling wave for multi-terminal transmission lines)[J].电工电能新技术(Advanced Technology of Electrical Engineering and Energy),2017,36(2):74-80.
[2]范春菊,姜军,郭煜华,等(Fan Chunju,Jiang Jun,Guo Yuhua,et al).输电线路行波故障测距技术的发展与应用(Development and applications of traveling wave fault location on transmission lines)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2017,29(4):129-134.
[3]罗毅,田吉华(Luo Yi,Tian Jihua).基于双端数据和算法融合的输电线路故障测距新方法(Transmission line fault location method based on double-ended data and algorithm-fusion)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2016,28(12):1-6.
[4]马丹丹,王晓茹(Ma Dandan,Wang Xiaoru).基于小波模极大值的单端行波故障测距(Single terminal method of traveling wave fault location based on wavelet modulus maxima)[J].电力系统保护与控制(Power System Protection and Control),2009,37(3):55-59.
[5]郑州,吕艳萍,王杰,等(Zheng Zhou,LüYanping,Wang Jie,et al).基于小波变换的双端行波测距新方法(Anew two terminal traveling wave fault location method based on wavelet transform)[J].电网技术(Power System Technology),2010,34(1):203-207.
[6]覃剑,陈祥训,郑健超,等(Qin Jian,Chen Xiangxun,Zheng Jianchao,et al).利用小波变换的双端行波测距新方法(A new double terminal method of traveling wave fault location using wavelet transform)[J].中国电机工程学报(Proceedings of the CSEE),2000,20(8):6-10.
[7]张小丽,曾祥君,马洪江,等(Zhang Xiaoli,Zeng Xiangjun,Ma Hongjiang,et al).基于Hilbert-Huang变换的电网故障行波定位方法(Power grid faults location with traveling wave based on Hilbert-Huang transform)[J].电力系统自动化(Automation of Electric Power Systems),2008,32(8):64-68.
[8]雷强,刘光晔,朱永强,等(Lei Qiang,Liu Guangye,Zhu Yongqiang,et al).基于EEMD和矩阵束算法的低频振荡主导模式识别(Identification of the dominant mode based on EEMD and matrix pencil algorithm for low frequency oscillations)[J].电力系统保护与控制(Power System Protection and Control),2016,44(12):56-62.
[9]康守强,王玉静,杨广学,等(Kang Shouqiang,Wang Yujing,Yang Guangxue,et al).基于经验模态分解和超球多类支持向量机的滚动轴承故障诊断方法(Rolling bearing fault diagnosis method using empirical mode decomposition and hypersphere multiclass support vector machine)[J].中国电机工程学报(Proceedings of the CSEE),2011,31(14):96-102.
[10]钱佳琪,叶佳卓,旷哲,等(Qian Jiaqi,Ye Jiazhuo,Kuang Zhe,et al).基于S变换的多端输电网故障定位方法(Afault location method for multi-terminal transmission network based on S transform)[J].电力系统保护与控制(Power System Protection and Control),2014,42(23):82-88.
[11]王奎鑫,祝成,孙佳佳,等(Wang Kuixin,Zhu Cheng,Sun Jiajia,et al).输电线路组合行波测距方法研究(Research of combined traveling wave’s fault location method on transmission lines)[J].电力系统保护与控制(Power System Protection and Control),2012,40(15):82-86.
[12]尹晓光,宋琳琳,尤志,等(Yin Xiaoguang,Song Linlin,You Zhi,et al).与波速无关的输电线路双端行波故障测距研究(Study of fault locating for transmission line double terminal traveling waves unrelated to wave speed)[J].电力系统保护与控制(Power System Protection and Control),2011,39(1):35-39.
[13]高艳丰,朱永利,闫红艳,等(Gao Yanfeng,Zhu Yongli,Yan Hongyan,et al).基于改进双端法的输电线路行波故障定位(Traveling waves fault location of transmission lines based on improved double-end method)[J].电测与仪表(Electrical Measurement&Instrumentation),2015,52(1):41-46,52.
[14]高艳丰,朱永利,闫红艳,等(Gao Yanfeng,Zhu Yongli,Yan Hongyan,et al).一种新型的输电线路双端行波故障定位方法(A new fault location method of transmission lines based on double-terminal traveling wave)[J].电力系统保护与控制(Power System Protection and Control),2016,44(8):8-13.
[15]Dragomiretskiy K,Zosso D.Variational mode decomposition[J].IEEE Trans on Signal Processing,2014,62(3):531-544.
[16]贾亚飞,朱永利,王刘旺,等(Jia Yafei,Zhu Yongli,Wang Liuwang,et al).基于VMD和多尺度熵的变压器内绝缘局部放电信号特征提取及分类(Feature extraction and classification on partial discharge signals of power transformers based on VMD and multiscale entropy)[J].电工技术学报(Transactions of China Electrotechnical Society),2016,31(19):208-217.
[17]高艳丰,朱永利,闫红艳,等(Gao Yanfeng,Zhu Yongli,Yan Hongyan,et al).基于VMD和TEO的高压输电线路雷击故障测距研究(Study on lighting fault locating of high-voltage transmission lines based on VMD and TEO)[J].电工技术学报(Transactions of China Electrotechnical Society),2016,31(1):24-33.
[18]梁军,麻常辉,贠志皓(Liang Jun,Ma Changhui,Yun Zhihao).基于线路参数估计的高压架空输电线路故障测距新算法(A fault location algorithm for high voltage overhead power transmission line based on line parameter estimation)[J].电网技术(Power System Technology),2004,28(4):60-63,68.
[19]王召磊,刘明光(Wang Zhaolei,Liu Mingguang).基于线性方程组解的T型线路行波测距(Traveling wave fault location for teed transmission line based on solutions of linear equations)[J].电网技术(Power System Technology),2014,38(4):1046-1050.
[20]范新桥,朱永利(Fan Xinqiao,Zhu Yongli).基于双端行波原理的多端输电线路故障定位新方法(A novel fault location scheme for multi-terminal transmission lines based on principle of double-ended traveling wave)[J].电网技术(Power System Technology),2013,37(1):261-269.--------
[2]范春菊,姜军,郭煜华,等(Fan Chunju,Jiang Jun,Guo Yuhua,et al).输电线路行波故障测距技术的发展与应用(Development and applications of traveling wave fault location on transmission lines)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2017,29(4):129-134.
[3]罗毅,田吉华(Luo Yi,Tian Jihua).基于双端数据和算法融合的输电线路故障测距新方法(Transmission line fault location method based on double-ended data and algorithm-fusion)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2016,28(12):1-6.
[4]马丹丹,王晓茹(Ma Dandan,Wang Xiaoru).基于小波模极大值的单端行波故障测距(Single terminal method of traveling wave fault location based on wavelet modulus maxima)[J].电力系统保护与控制(Power System Protection and Control),2009,37(3):55-59.
[5]郑州,吕艳萍,王杰,等(Zheng Zhou,LüYanping,Wang Jie,et al).基于小波变换的双端行波测距新方法(Anew two terminal traveling wave fault location method based on wavelet transform)[J].电网技术(Power System Technology),2010,34(1):203-207.
[6]覃剑,陈祥训,郑健超,等(Qin Jian,Chen Xiangxun,Zheng Jianchao,et al).利用小波变换的双端行波测距新方法(A new double terminal method of traveling wave fault location using wavelet transform)[J].中国电机工程学报(Proceedings of the CSEE),2000,20(8):6-10.
[7]张小丽,曾祥君,马洪江,等(Zhang Xiaoli,Zeng Xiangjun,Ma Hongjiang,et al).基于Hilbert-Huang变换的电网故障行波定位方法(Power grid faults location with traveling wave based on Hilbert-Huang transform)[J].电力系统自动化(Automation of Electric Power Systems),2008,32(8):64-68.
[8]雷强,刘光晔,朱永强,等(Lei Qiang,Liu Guangye,Zhu Yongqiang,et al).基于EEMD和矩阵束算法的低频振荡主导模式识别(Identification of the dominant mode based on EEMD and matrix pencil algorithm for low frequency oscillations)[J].电力系统保护与控制(Power System Protection and Control),2016,44(12):56-62.
[9]康守强,王玉静,杨广学,等(Kang Shouqiang,Wang Yujing,Yang Guangxue,et al).基于经验模态分解和超球多类支持向量机的滚动轴承故障诊断方法(Rolling bearing fault diagnosis method using empirical mode decomposition and hypersphere multiclass support vector machine)[J].中国电机工程学报(Proceedings of the CSEE),2011,31(14):96-102.
[10]钱佳琪,叶佳卓,旷哲,等(Qian Jiaqi,Ye Jiazhuo,Kuang Zhe,et al).基于S变换的多端输电网故障定位方法(Afault location method for multi-terminal transmission network based on S transform)[J].电力系统保护与控制(Power System Protection and Control),2014,42(23):82-88.
[11]王奎鑫,祝成,孙佳佳,等(Wang Kuixin,Zhu Cheng,Sun Jiajia,et al).输电线路组合行波测距方法研究(Research of combined traveling wave’s fault location method on transmission lines)[J].电力系统保护与控制(Power System Protection and Control),2012,40(15):82-86.
[12]尹晓光,宋琳琳,尤志,等(Yin Xiaoguang,Song Linlin,You Zhi,et al).与波速无关的输电线路双端行波故障测距研究(Study of fault locating for transmission line double terminal traveling waves unrelated to wave speed)[J].电力系统保护与控制(Power System Protection and Control),2011,39(1):35-39.
[13]高艳丰,朱永利,闫红艳,等(Gao Yanfeng,Zhu Yongli,Yan Hongyan,et al).基于改进双端法的输电线路行波故障定位(Traveling waves fault location of transmission lines based on improved double-end method)[J].电测与仪表(Electrical Measurement&Instrumentation),2015,52(1):41-46,52.
[14]高艳丰,朱永利,闫红艳,等(Gao Yanfeng,Zhu Yongli,Yan Hongyan,et al).一种新型的输电线路双端行波故障定位方法(A new fault location method of transmission lines based on double-terminal traveling wave)[J].电力系统保护与控制(Power System Protection and Control),2016,44(8):8-13.
[15]Dragomiretskiy K,Zosso D.Variational mode decomposition[J].IEEE Trans on Signal Processing,2014,62(3):531-544.
[16]贾亚飞,朱永利,王刘旺,等(Jia Yafei,Zhu Yongli,Wang Liuwang,et al).基于VMD和多尺度熵的变压器内绝缘局部放电信号特征提取及分类(Feature extraction and classification on partial discharge signals of power transformers based on VMD and multiscale entropy)[J].电工技术学报(Transactions of China Electrotechnical Society),2016,31(19):208-217.
[17]高艳丰,朱永利,闫红艳,等(Gao Yanfeng,Zhu Yongli,Yan Hongyan,et al).基于VMD和TEO的高压输电线路雷击故障测距研究(Study on lighting fault locating of high-voltage transmission lines based on VMD and TEO)[J].电工技术学报(Transactions of China Electrotechnical Society),2016,31(1):24-33.
[18]梁军,麻常辉,贠志皓(Liang Jun,Ma Changhui,Yun Zhihao).基于线路参数估计的高压架空输电线路故障测距新算法(A fault location algorithm for high voltage overhead power transmission line based on line parameter estimation)[J].电网技术(Power System Technology),2004,28(4):60-63,68.
[19]王召磊,刘明光(Wang Zhaolei,Liu Mingguang).基于线性方程组解的T型线路行波测距(Traveling wave fault location for teed transmission line based on solutions of linear equations)[J].电网技术(Power System Technology),2014,38(4):1046-1050.
[20]范新桥,朱永利(Fan Xinqiao,Zhu Yongli).基于双端行波原理的多端输电线路故障定位新方法(A novel fault location scheme for multi-terminal transmission lines based on principle of double-ended traveling wave)[J].电网技术(Power System Technology),2013,37(1):261-269.--------