配电系统接地故障的信号注入检测法的分析与研究
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摘要
中性点非有效接地系统单相接地故障选线问题一直以来是电力系统继电保护工作的重要课题。但现场运行的结果表明,装置的选线效果并不是十分理想。以往选线装置大多采用的是单一的被动式故障选线方法,且其采集信号不是利用零序电流的暂态量就是利用其稳态量。本论文提出了一种可控的周期性主动式检测方法——脉冲信号注入法。应用Matlab/Simulink建立了模型,通过对不同条件下的各种接地故障情况的仿真研究,提出对NUS采用基于差值运算法提取脉冲响应信号,再通过波形识别来进行故障选线的方法;对NES采用基于小波变换提取脉冲响应信号,进而通过群体比幅法来达到故障选线目的的选线方案。经过理论分析和仿真验证,上述方法是切实可行的。
Fault detection for the non-effective single-phase earth system is an important task for ensuring the continuity of power supply. But the spot records show that the effect is not perfect. Most of the fault detection device in the past is used in a single passive fault line detection method, and it collects signals by the means of transient volume of the zero-sequence current or steady volume. Pulse injection method is proposed in this paper. It is a controllable cycle pulse responds method and can detect the fault positively. A simulation model is built by using Matlab/Simulink. And simulations of various ground faults under different conditions are performed. It is presented in the paper that in the fault detection of NUS system impulse response signal is extracted based on the method of margin calculation, and the fault line selection method is carried out by the waveform recognition. In the fault detection of NES system the impulse response signal is extracted based on wavelet transform, then the fault is detected by colony amplitude comparison. After theoretical analysis and simulation, the results show that this approach is practicable.
Fault detection for the non-effective single-phase earth system is an important task for ensuring the continuity of power supply. But the spot records show that the effect is not perfect. Most of the fault detection device in the past is used in a single passive fault line detection method, and it collects signals by the means of transient volume of the zero-sequence current or steady volume. Pulse injection method is proposed in this paper. It is a controllable cycle pulse responds method and can detect the fault positively. A simulation model is built by using Matlab/Simulink. And simulations of various ground faults under different conditions are performed. It is presented in the paper that in the fault detection of NUS system impulse response signal is extracted based on the method of margin calculation, and the fault line selection method is carried out by the waveform recognition. In the fault detection of NES system the impulse response signal is extracted based on wavelet transform, then the fault is detected by colony amplitude comparison. After theoretical analysis and simulation, the results show that this approach is practicable.
引文
[1]李润先.中压电网系统接地实用技术.北京:中国电力出版社,2001,1～10
[2]要焕年,曹梅月.电力系统谐振接地.北京:中国电力出版社,2000, 53～59
[3]粟薇.基于小波原理的小电流接地系统故障选线新方法研究:[硕士论文].保定:华北电力大学,2006
[4]张慧芬.配电网单相接地故障检测技术研究:[博士论文].山东:山东大学,2006
[5]沈洪涛.基于故障暂态信息的小电流接地系统接地选线新方法的研究:[硕士论文].山东:山东大学,2005
[6]战祥新.基于 Matlab 的小电流接地系统自动选线仿真研究:[硕士论文].青岛:青岛大学,2003
[7]齐郑,杨以涵.中性点非有效接地系统单相接地选线技术分析.电力系统自动化,2004,28(14):1～5.
[8]束洪春,司大军.一种利用衰减直流分量的谐振接地系统故障选线方法.中国电力,2006,39(2):1～4.
[9]胡佐, 李欣然, 李培强.小电流接地系统单相故障选线的方法与实现.高电压技术.2007,33(1):41～44.
[10] Dong Xinzhou, Chen Zheng, He Xuanzhou, Wang Kehong, Luo Chengmu, “Optimizing solution of fault location”, Power Engineering Society Summer Meeting 2002 IEEE, Vol.3, 21-25 July 2002, pp.1113～1117
[11]贺家李,宋从矩.电力系统继电保护原理,北京:中国电力出版社,1994,6～9
[12] Verho P.,Nikander A., Jarventaustap., “Aspects on Development of Distribution Network Fault Location and Management”, Eighth IEE International Conference on Development in Power System Protection 2004, Vol.2, 5-8 April 2004, pp.784～787
[13]张帆,潘贞存,张慧芬,等.基于零序电流暂态极大值的小电流接地选线新判据.电力系统自动化,2006,30(4):45～48.
[14]李国富,陈维江.配电系统零序功率选线法的可靠性分析.电力设备,2005,6(4):14～19.
[15]张慧芬,潘贞存,田质广,等.一种中低压配电网单相接地故障选线新方法.电网技术,2005,29(3):76～80.
[16]陈烔聪,齐郑,杨奇逊.基于模糊理论的小电流单相接地选线装置.电力系统自动化,2004,28(8)
[17] Myeon-Song Choi, Seung-Jae Lee, Duck-Su Lee, Bo-Gun Jin, “A New FaultLocation Algorithm Using Direct Circuit Analysis for Distribution Systems” , IEEE Transactions on Power Delivery, Vol.19, No.1,Jan 2004, pp.35～41
[18]瞿敏,张炳达,刘长胜.基于 S 注入法的小电流系统消谐与选线一体化方案研究.现代电力,2003,20(3、4):35～39.
[19]张朝平,周有庆,王娜.基波电流注入法实现的单相接地选线.继电器,2006,34(9):70～72.
[20]傅知兰.电力系统电气设备选择与实用计算.北京:中国电力出版社.2004.
[21]胡昌华,李国华,刘涛,等. 基于 MATLAB 6.X 的系统分析与设计-小波分析. 西安:西安电子科技大学出版社,2004,23～27
[22]吴天明,谢小竹,彭彬.MATLAB 电力系统设计与分析.北京:国防工业出版社. 2004,1～2
[23] Code Composer User’s Guide, Texas Instruments Incorporated,1999
[24] S . Matllat,S . Zhong, Characterization of Signals from mutiscale edges. IEEE Chs.Trans.Petenand Machine Intelligence, 1992,14(7)
[25] M.Kezunovic, B.Perunicic, Automated Transmission Line Fault Analysis using Synchronized Sampling at Two Ends.IEEE Trans.On Power Systems, 1996,11(1).
[26] 马坷,张保会,中性点非直接接地系统故障选线原理的发展与展望,继电器,2003,31 ( 5 ): 65～70
[27] Fulczyk M, Bertsch J.Ground-fault currents in unit-connected generators with different elements grounding neutral.IEEE Trans Energy Conversion, 2002, 17 (1): 61～66
[28]O.Rioul, M.Vetterli, Wavelet and Signal Processing.IEEE Signal Processing Magazine, 1991, 8(4).
[29]张慧芬,田质广,王慧等.“S 注入法”与 PT.电力系统及其自动化学报,2003,15(2):92～93,97.
[30]陈德树,张哲,尹项根.微机继电保护.北京:中国电力出版社,2000:3～36
[31] 赵静,何正友,钱清泉.中性点脉宽注入法在铁路自闭贯通输电线路故障定位中的应用.电网技术,2006,30(16):59～63.
[32] 彭玉华.小波变换与工程应用.北京:科学出版社,2003
[33] John P,Nelson.System grounding and ground-fault protection in the petrochemical industry: a need for a better understanding.IEEE Trans Industry Application.2002, 38 (6):1633～1640.
[34] Meyer Y Wavelets Algorithms & Applications Society for Industrial and applied mathmatics(SLAM) 1993
[2]要焕年,曹梅月.电力系统谐振接地.北京:中国电力出版社,2000, 53～59
[3]粟薇.基于小波原理的小电流接地系统故障选线新方法研究:[硕士论文].保定:华北电力大学,2006
[4]张慧芬.配电网单相接地故障检测技术研究:[博士论文].山东:山东大学,2006
[5]沈洪涛.基于故障暂态信息的小电流接地系统接地选线新方法的研究:[硕士论文].山东:山东大学,2005
[6]战祥新.基于 Matlab 的小电流接地系统自动选线仿真研究:[硕士论文].青岛:青岛大学,2003
[7]齐郑,杨以涵.中性点非有效接地系统单相接地选线技术分析.电力系统自动化,2004,28(14):1～5.
[8]束洪春,司大军.一种利用衰减直流分量的谐振接地系统故障选线方法.中国电力,2006,39(2):1～4.
[9]胡佐, 李欣然, 李培强.小电流接地系统单相故障选线的方法与实现.高电压技术.2007,33(1):41～44.
[10] Dong Xinzhou, Chen Zheng, He Xuanzhou, Wang Kehong, Luo Chengmu, “Optimizing solution of fault location”, Power Engineering Society Summer Meeting 2002 IEEE, Vol.3, 21-25 July 2002, pp.1113～1117
[11]贺家李,宋从矩.电力系统继电保护原理,北京:中国电力出版社,1994,6～9
[12] Verho P.,Nikander A., Jarventaustap., “Aspects on Development of Distribution Network Fault Location and Management”, Eighth IEE International Conference on Development in Power System Protection 2004, Vol.2, 5-8 April 2004, pp.784～787
[13]张帆,潘贞存,张慧芬,等.基于零序电流暂态极大值的小电流接地选线新判据.电力系统自动化,2006,30(4):45～48.
[14]李国富,陈维江.配电系统零序功率选线法的可靠性分析.电力设备,2005,6(4):14～19.
[15]张慧芬,潘贞存,田质广,等.一种中低压配电网单相接地故障选线新方法.电网技术,2005,29(3):76～80.
[16]陈烔聪,齐郑,杨奇逊.基于模糊理论的小电流单相接地选线装置.电力系统自动化,2004,28(8)
[17] Myeon-Song Choi, Seung-Jae Lee, Duck-Su Lee, Bo-Gun Jin, “A New FaultLocation Algorithm Using Direct Circuit Analysis for Distribution Systems” , IEEE Transactions on Power Delivery, Vol.19, No.1,Jan 2004, pp.35～41
[18]瞿敏,张炳达,刘长胜.基于 S 注入法的小电流系统消谐与选线一体化方案研究.现代电力,2003,20(3、4):35～39.
[19]张朝平,周有庆,王娜.基波电流注入法实现的单相接地选线.继电器,2006,34(9):70～72.
[20]傅知兰.电力系统电气设备选择与实用计算.北京:中国电力出版社.2004.
[21]胡昌华,李国华,刘涛,等. 基于 MATLAB 6.X 的系统分析与设计-小波分析. 西安:西安电子科技大学出版社,2004,23～27
[22]吴天明,谢小竹,彭彬.MATLAB 电力系统设计与分析.北京:国防工业出版社. 2004,1～2
[23] Code Composer User’s Guide, Texas Instruments Incorporated,1999
[24] S . Matllat,S . Zhong, Characterization of Signals from mutiscale edges. IEEE Chs.Trans.Petenand Machine Intelligence, 1992,14(7)
[25] M.Kezunovic, B.Perunicic, Automated Transmission Line Fault Analysis using Synchronized Sampling at Two Ends.IEEE Trans.On Power Systems, 1996,11(1).
[26] 马坷,张保会,中性点非直接接地系统故障选线原理的发展与展望,继电器,2003,31 ( 5 ): 65～70
[27] Fulczyk M, Bertsch J.Ground-fault currents in unit-connected generators with different elements grounding neutral.IEEE Trans Energy Conversion, 2002, 17 (1): 61～66
[28]O.Rioul, M.Vetterli, Wavelet and Signal Processing.IEEE Signal Processing Magazine, 1991, 8(4).
[29]张慧芬,田质广,王慧等.“S 注入法”与 PT.电力系统及其自动化学报,2003,15(2):92～93,97.
[30]陈德树,张哲,尹项根.微机继电保护.北京:中国电力出版社,2000:3～36
[31] 赵静,何正友,钱清泉.中性点脉宽注入法在铁路自闭贯通输电线路故障定位中的应用.电网技术,2006,30(16):59～63.
[32] 彭玉华.小波变换与工程应用.北京:科学出版社,2003
[33] John P,Nelson.System grounding and ground-fault protection in the petrochemical industry: a need for a better understanding.IEEE Trans Industry Application.2002, 38 (6):1633～1640.
[34] Meyer Y Wavelets Algorithms & Applications Society for Industrial and applied mathmatics(SLAM) 1993