基于空间磁场的电网故障行波检测新方法
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摘要
为避免变电站强电磁干扰对行波检测精度的影响,提出了一种空间磁场检测故障的新方法。根据输电线路附近的磁场能实时反映线路上电流变化的特征,利用自然边界元法分析三相输电线路的磁场情况,选择合适的位置设置检测点,并在检测点安装空间电磁传感器提取线路电流在空间产生的磁场信号,再采用固有时间尺度分解方法分析磁场信号提取故障行波。空间电磁传感器安装在变电站外,检测时能有效避免变电站内的强电磁干扰,可有效提高故障行波信号检测的可靠性与准确性,为故障行波定位与保护提供更有效的基础数据。
To avoid the influence of strong electromagnetic disturbance on the accuracy of traveling wave detection,anew method for space magnetic field detection is proposed.Based on the feature that the magnetic field signals near-transmission lines reflect current variations,natural boundary element method is firstly used to analyze the magneticfield profiles of three-phase transmission lines to choose a suitable position of check point,on which magnetic sensorswill be installed.Then,the magnetic signals produced by the line current in the space are extracted.Finally,the magnet-ic signals are analyzed to extract the fault travelling waves using intrinsic time scale decomposition method.By installingthe magnetic sensors outside the transformer substation,the strong electromagnetic disturbance can be avoided efficient-ly,and the accuracy and reliability of fault traveling wave signal detection can be improved.In addition,more effectivebasic data can be provided for the location and protection of fault traveling waves.
To avoid the influence of strong electromagnetic disturbance on the accuracy of traveling wave detection,anew method for space magnetic field detection is proposed.Based on the feature that the magnetic field signals near-transmission lines reflect current variations,natural boundary element method is firstly used to analyze the magneticfield profiles of three-phase transmission lines to choose a suitable position of check point,on which magnetic sensorswill be installed.Then,the magnetic signals produced by the line current in the space are extracted.Finally,the magnet-ic signals are analyzed to extract the fault travelling waves using intrinsic time scale decomposition method.By installingthe magnetic sensors outside the transformer substation,the strong electromagnetic disturbance can be avoided efficient-ly,and the accuracy and reliability of fault traveling wave signal detection can be improved.In addition,more effectivebasic data can be provided for the location and protection of fault traveling waves.
引文
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[13]黄红英(Huang Hongying).椭球外区域问题的自然边界元法(A natural boundary element method for Laplaceequation outside an ellipsoid)[J].浙江海洋学院学报:自然科学版(Journal of Zhejiang Ocean University:NaturalScience),2009,28(1):75-80.
[14]臧彤,赵慧明,杨敏(Zang Tong,Zhao Huiming,YangMin).基于自然边界元与有限元耦合的重叠型迭代算法(Overlapping itterative algorithm based on couplingmethod of natural boundary element and finite element)[J].世界科技研究与发展(World Sci-Tech R&D),2011,33(2):179-181.
[15]Kumar P,Juneja J K,Prakash C,et al.Enhancement ingrain and grain boundary resistivity of BPZT ceramics bytwo stage sintering[J].Journal of Alloys and Compounds,2014,608:318-322,325.
[16]黄建才,朱永利(Huang Jiancai,Zhu Yongli).基于改进固有时间尺度分解法的绝缘子泄漏电流去噪研究(Re-search on de-noising of insulator leakage current based onimproved intrinsic time-scale deposition)[J].电工技术学报(Transactions of China Electrotechnical Society),2013,28(1):57-64.
[17]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 linefault location method based on double-ended data and al-gorithm-fusion)[J].电力系统及其自动化学报(Proceed-ings of the CSU-EPSA),2016,28(12):1-6.
[2]冷崇富,江亚群,黄纯,等(Leng Chongfu,Jiang Yaqun,Huang Chun,et al).高压输电线路单相故障性质诊断方法(Method to diagnose property of single-phase fault on high-voltage transmission lines)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2015,27(11):46-50.
[3]宣文博,张艳霞(Xuan Wenbo,Zhang Yanxia).串联电容补偿线路接地故障的行波测距新方法(New traveling wave grounding fault location of series capacitor compensated transmission line)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2015,27(6):48-55.
[4]孙波,张承慧,孙同景,等(Sun Bo,Zhang Chenghui,Sun Tongjing,et al).配电架空线路非接触式故障电流测量方法(A new non-contact approach for fault current measurement of non-solidly earthed overhead lines)[J].电力系统自动化(Automation of Electric Power Systems),2012,36(10):107-112.
[5]曾祥君,陈楠,李泽文,等(Zeng Xiangjun,Chen Nan,Li Zewen,et al).基于网络的故障行波定位算法(Networkbased algorithm for fault location with traveling wave)[J].中国电机工程学报(Proceedings of the CSEE),2009,28(31):48-53.
[6]Lee H,Mousa A M.GPS traveling-wave fault locator systems:Investigation into the anomalous measurements related to lightning strikes[J].IEEE Trans on Power Delivery,1996,11(3):1214-1223.
[7]曾祥君,尹项根,林福昌(Zeng Xiangjun,Yin Xianggen,Lin Fuchang).基于行波传感器的输电线路故障定位方法研究(Study on fault location for transmission lines based on the sensor of traveling-wave)[J].中国电机工程学报(Proceedings of the CSEE),2002,22(6):42-46.
[8]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.
[9]Lee J B,Ha C W,Jung C H.Development of digital distance relaying algorithm in combined transmission lineswith underground power cables[C]//IEEE Power Engineer-ing Society Summer Meeting.Vancouver,Canada,2001:611-616.
[10]李泽文,姚建刚,曾祥君,等(Li Zewen,Yao Jiangang,Zeng Xiangjun,et al).基于整个电网行波时差的故障定位方法(Fault location based on traveling wave time dif-ference in power grid)[J].中国电机工程学报(Proceed-ings of the CSEE),2009,29(4):60-64.
[11]安学利,蒋东翔,刘超,等(An Xueli,Jiang Dongxiang,Liu Chao,et al).基于固有时间尺度分解的风电机组轴承故障特征提取(Bearing fault feature extraction of windturbine based on intrinsic time-scale decomposition)[J].电力系统自动化(Automation of Electric Power Sys-tems),2012,36(5):41-44,102.
[12]杜林,常阿飞,司马文霞,等(Du Lin,Chang Afei,SimaWenxia,et al).一种非接触式架空输电线路过电压传感器(A non-contact over-voltage sensor for overhead pow-er transmission lines)[J].电力系统自动化(Automationof Electric Power Systems),2010,34(11):93-97.
[13]黄红英(Huang Hongying).椭球外区域问题的自然边界元法(A natural boundary element method for Laplaceequation outside an ellipsoid)[J].浙江海洋学院学报:自然科学版(Journal of Zhejiang Ocean University:NaturalScience),2009,28(1):75-80.
[14]臧彤,赵慧明,杨敏(Zang Tong,Zhao Huiming,YangMin).基于自然边界元与有限元耦合的重叠型迭代算法(Overlapping itterative algorithm based on couplingmethod of natural boundary element and finite element)[J].世界科技研究与发展(World Sci-Tech R&D),2011,33(2):179-181.
[15]Kumar P,Juneja J K,Prakash C,et al.Enhancement ingrain and grain boundary resistivity of BPZT ceramics bytwo stage sintering[J].Journal of Alloys and Compounds,2014,608:318-322,325.
[16]黄建才,朱永利(Huang Jiancai,Zhu Yongli).基于改进固有时间尺度分解法的绝缘子泄漏电流去噪研究(Re-search on de-noising of insulator leakage current based onimproved intrinsic time-scale deposition)[J].电工技术学报(Transactions of China Electrotechnical Society),2013,28(1):57-64.
[17]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 linefault location method based on double-ended data and al-gorithm-fusion)[J].电力系统及其自动化学报(Proceed-ings of the CSU-EPSA),2016,28(12):1-6.