利用单一电流模量波形互相关系数的故障选相方案
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摘要
为了快速识别引起电压暂降的故障相别,提出一种仅利用单一电流模量波形特征的故障选相方案。采用一种新的相模变换矩阵实现了全部故障类型下电流1模、2模量均不为零,以1模电流时域波形为基准,利用三相相电流及其组合电流与1模电流波形互相关系数的不同特征实现故障相的识别。PSCAD仿真计算结果表明,利用单一电流模量的波形特征的故障选相方法是有效和正确的,能够在不同过渡电阻、故障位置及故障相角等情况下快速准确的故障选相,为实施按相电压暂降补偿提供依据。
In order to quickly detect faulted phase in condition of voltage sags for distribution network, this paper proposes a faulted phase selection scheme using waveform characteristic of single-mode current. It uses a novel phase mode transformation matrix to achieve that mode 1 and 2 are not zero in all faulted types, and then taking mode 1 as reference, adopts waveform cross-correlation coefficient characteristics of three-phase current and its combined current and mode 1 current to achieve fault phase identification. PSCAD simulation results indicate that the proposed method is correct and effective, and can quickly and accurately identify faulted types under different fault conditions such as different fault locations, fault resistances and fault inception angles, which provides the basis of implementing phase voltage sag compensation.
In order to quickly detect faulted phase in condition of voltage sags for distribution network, this paper proposes a faulted phase selection scheme using waveform characteristic of single-mode current. It uses a novel phase mode transformation matrix to achieve that mode 1 and 2 are not zero in all faulted types, and then taking mode 1 as reference, adopts waveform cross-correlation coefficient characteristics of three-phase current and its combined current and mode 1 current to achieve fault phase identification. PSCAD simulation results indicate that the proposed method is correct and effective, and can quickly and accurately identify faulted types under different fault conditions such as different fault locations, fault resistances and fault inception angles, which provides the basis of implementing phase voltage sag compensation.
引文
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[15]方斯顿,程浩忠,徐国栋,等.基于Nataf变换含相关性的扩展准蒙特卡洛随机潮流方法[J].电工技术学报,2017,32(2):254-263.FANG Sidun,CHENG Haozhong,XU Guodong,et al.A Nataf transformation based on extended quasi monte carlo simulation method for solving probabilistic loadflow problems with correlated random variables[J].Transactions of China Electrotechnical Society,2017,32(2):254-263.
[16]袁荣湘,陈德树,马天皓,等.基于相关分析的暂态电流差动保护的原理与性能研究[J].电网技术,2000,24(4):40-42.YUAN Rongxiang,CHEN Deshu,MA Tianhao,et al.Study on transient current differential protection based on correlation analysis[J].Power System Technology,2000,24(4):40-42.
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[18]王兴国,张举.基于相关分析和模糊推理的故障选相元件[J].电网技术,2006,30(14):93-97.WANG Xingguo,ZHANG Ju.A novel faulty phase selector based on correlation analysis and fuzzy reasoning[J].Power System Technology,2006,30(14):93-97.
[19]毛鹏,段玉倩,姜娜.基于相关分析的故障选线方法[J].电网技术,2004,28(2):36-39.MAO Peng,DUNA Yuqian,JIANG Na.A correlation analysis based method to detect faulty line under single phase to ground fault occurred in distribution networker with small current neutral grounding[J].Power System Technology,2004,28(2):36-39.
[20]周湶,卢毅,廖瑞金,等.基于小波包提取算法和相关分析的电缆双端行波测距[J].电力系统保护与控制,2012,40(1):1-4.ZHOU Quan,LU Yi,LIAO Ruijin,et al.Double terminal traveling wave fault location for cable based on the wavelet packet extraction algorithm and correlation analysis[J].Power System Protection and Control,2012,40(1):1-4.
[21]刘慧海,张晓莉,姜博,等.行波故障测距装置的检测与评价[J].电力系统保护与控制,2015,43(1):145-149.LIU Huihai,ZHANG Xiaoli,JIANG Bo,et al.Testing and evaluation method of fault location equipment based on traveling wave[J].Power System Protection and Control,2015,43(1):145-149.
[22]邵文权,乔妮,王建波.基于波形互相关系数的变压器励磁涌流识别方法[J].电力系统保护与控制,2015,43(23):14-20.SHAO Wenquan,QIAO Ni,WANG Jianbo.A novel algorithm of identifying inrush current based on waveform cross-correlation coefficient[J].Power System Protection and Control,2015,43(23):14-20.
[23]王克星,宋政湘,陈德桂,等.基于小波变换的配电网电压暂降的干扰源辨识[J].中国电机工程学报,2003,23(6):29-34,54.WANG Kexing,SONG Zhengxiang,CHEN Degui,et al.Interference source identification of voltage sag in distribution system based on wavelet transform[J].Proceedings of the CSEE,2003,23(6):29-34,54.
[24]田书,刘芳芳,任晓明.基于暂态量的同塔双回线路故障选相研究[J].电力系统保护与控制,2015,43(1):50-54.TIAN Shu,LIU Fangfang,REN Xiaoming.Research on transient-based faulty phase selection for double-circuit lines on the same tower[J].Power System Protection and Control,2015,43(1):50-54.
[25]王爱军,李宏,张小桃.一种基于小波变换的超高压线路故障选相方法[J].电力系统保护与控制,2013,41(12):92-97.WANG Aijun,LI Hong,ZHANG Xiaotao.A scheme of faulted phase selection in EHV transmission line based on wavelet transforms[J].Power System Protection and Control,2013,41(12):92-97.
[2]王攀,王泳涛,王宝玉.基于特征约简理论的机组振动故障诊断模型[J].热力发电,2016,45(2):97-100.WANG Pan,WANG Yongtao,WANG Baoyu.Fault diagnosis model for steam turbine vibration based on feature reduction theory[J].Thermal Power Generation,2016,45(2):97-100.
[3]陈众励,许维胜.电压中断与电压暂降的成因其及防治[J].电工技术学报,2015,30(1):518-520.CHEN Zhongli,XU Weisheng.Reason and prevention of voltage interruption and voltage sags[J].Transactions of China Electrotechnical Society,2015,30(1):518-520.
[4]赵靓,柴庆龙.基于分层模糊符号有向图法的故障诊断方法[J].热力发电,2015,4(11):26-31.ZHAO Liang,CHAI Qinglong.A fault diagnosis approach based on hierarchical fuzzy signed directed graph model[J].Thermal Power Generation,2015,4(11):26-31.
[5]陈亚,李梦诗.基于瞬时能量比的输电线路故障选相方案[J].电力系统保护与控制,2016,44(1):56-64.CHEN Ya,LI Mengshi.A faulted phase selection scheme for transmission lines based on instantaneous energy ratio[J].Power System Protection and Control,2016,44(1):56-64.
[6]蒋晨达.基于简化对称分量法电压选相原理分析[J].淮海工学院学报(自然科学版),2014,23(4):36-40.JIANG Chenda.Voltage phase selection principle based on a simplified symmetrical component method[J].Journal of Huaihai Institute of Technology(Natural Science Edition),2014,23(4):36-40.
[7]葛耀中.新型继电保护与故障测距原理与技术[M].西安:西安交通大学出版社,1996.
[8]王安定,葛耀中.模量变换技术在反应故障分量的微机保护中的应用研究[J].电力系统自动化,1988,12(3):15-25.WANG Anding,GE Yaozhong.Application study of modal transformation techniques to microprocessor protection based on fault components[J].Automation of Electric Power Systems,1988,12(3):15-25.
[9]肖隆恩,熊榆,李鹏飞,等.新型相模变换矩阵在行波故障选相中的应用[J].电气开关,2016,1(1):86-88.XIAO Longen,XIONG Yu,LI Pengfei,et al.Application of a new model transformation matrix in the traveling wave fault phase selection[J].Electric Switchgear,2016,1(1):86-88.
[10]施围.电力系统过电压计算[M].西安:西安交通大学出版社,1988.
[11]宋国兵,李森,康小宁,等.一种新的相模变换矩阵[J].电力系统自动化,2007,31(14):57-60.SONG Guobing,LI Sen,KANG Xiaoning,et al.A novel phase mode transformation matrix[J].Automation of Electric Power Systems,2007,31(14):57-60.
[12]陈明,尹慧阳.新型相模变换矩阵在行波保护中的应用[J].供用电,2013,30(3):87-91.CHEN Ming,YIN Huiyang.Application of a new model transformation matrix in the traveling wave protection[J].Distribution&Utilization,2013,30(3):87-91.
[13]束洪春.电力工程信号处理应用[M].北京:科学出版社,2009.
[14]刘剑,邰能灵,范春菊,等.基于暂态电流Pearson相关性的两电平VSC-HVDC直流电路判断故障[J].电工技术学报,2017,32(3):74-85.LIU Jian,TAI Nengling,FAN Chunju,et al.A fault identification method for two-level VSC-HVDC DC linebased on pearson correlation of transient current[J].Transactions of China Electrotechnical Society,2017,32(3):74-85.
[15]方斯顿,程浩忠,徐国栋,等.基于Nataf变换含相关性的扩展准蒙特卡洛随机潮流方法[J].电工技术学报,2017,32(2):254-263.FANG Sidun,CHENG Haozhong,XU Guodong,et al.A Nataf transformation based on extended quasi monte carlo simulation method for solving probabilistic loadflow problems with correlated random variables[J].Transactions of China Electrotechnical Society,2017,32(2):254-263.
[16]袁荣湘,陈德树,马天皓,等.基于相关分析的暂态电流差动保护的原理与性能研究[J].电网技术,2000,24(4):40-42.YUAN Rongxiang,CHEN Deshu,MA Tianhao,et al.Study on transient current differential protection based on correlation analysis[J].Power System Technology,2000,24(4):40-42.
[17]林湘宁,刘沛,杨春明,等.基于相关分析的故障序分量选相元件[J].中国电机工程学报,2002,22(5):17-22.LIN Xiangning,LIU Pei,YANG Chunming,et al.A superimposed phase selector based on symmetrical components and correlation analysis[J].Proceedings of the CSEE,2002,22(5):17-22.
[18]王兴国,张举.基于相关分析和模糊推理的故障选相元件[J].电网技术,2006,30(14):93-97.WANG Xingguo,ZHANG Ju.A novel faulty phase selector based on correlation analysis and fuzzy reasoning[J].Power System Technology,2006,30(14):93-97.
[19]毛鹏,段玉倩,姜娜.基于相关分析的故障选线方法[J].电网技术,2004,28(2):36-39.MAO Peng,DUNA Yuqian,JIANG Na.A correlation analysis based method to detect faulty line under single phase to ground fault occurred in distribution networker with small current neutral grounding[J].Power System Technology,2004,28(2):36-39.
[20]周湶,卢毅,廖瑞金,等.基于小波包提取算法和相关分析的电缆双端行波测距[J].电力系统保护与控制,2012,40(1):1-4.ZHOU Quan,LU Yi,LIAO Ruijin,et al.Double terminal traveling wave fault location for cable based on the wavelet packet extraction algorithm and correlation analysis[J].Power System Protection and Control,2012,40(1):1-4.
[21]刘慧海,张晓莉,姜博,等.行波故障测距装置的检测与评价[J].电力系统保护与控制,2015,43(1):145-149.LIU Huihai,ZHANG Xiaoli,JIANG Bo,et al.Testing and evaluation method of fault location equipment based on traveling wave[J].Power System Protection and Control,2015,43(1):145-149.
[22]邵文权,乔妮,王建波.基于波形互相关系数的变压器励磁涌流识别方法[J].电力系统保护与控制,2015,43(23):14-20.SHAO Wenquan,QIAO Ni,WANG Jianbo.A novel algorithm of identifying inrush current based on waveform cross-correlation coefficient[J].Power System Protection and Control,2015,43(23):14-20.
[23]王克星,宋政湘,陈德桂,等.基于小波变换的配电网电压暂降的干扰源辨识[J].中国电机工程学报,2003,23(6):29-34,54.WANG Kexing,SONG Zhengxiang,CHEN Degui,et al.Interference source identification of voltage sag in distribution system based on wavelet transform[J].Proceedings of the CSEE,2003,23(6):29-34,54.
[24]田书,刘芳芳,任晓明.基于暂态量的同塔双回线路故障选相研究[J].电力系统保护与控制,2015,43(1):50-54.TIAN Shu,LIU Fangfang,REN Xiaoming.Research on transient-based faulty phase selection for double-circuit lines on the same tower[J].Power System Protection and Control,2015,43(1):50-54.
[25]王爱军,李宏,张小桃.一种基于小波变换的超高压线路故障选相方法[J].电力系统保护与控制,2013,41(12):92-97.WANG Aijun,LI Hong,ZHANG Xiaotao.A scheme of faulted phase selection in EHV transmission line based on wavelet transforms[J].Power System Protection and Control,2013,41(12):92-97.