配电网接地故障测距改进方法研究
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摘要
针对配电网发生故障时对国民经济造成巨大危害,介绍一种主要结合智能控制终端的故障定位测距模块和改进的故障测距方法。通过对常规测距方法的比较决定使用双端测距法对故障点进行定位;为提高测量结果的精度,引入差分环节和FIR滤波环节的全周傅氏算法对数据进行处理,并对所建立的原始模型进行扩展,最后通过Matlab进行仿真实验验证。结果表明该方法具有很高的可靠性和测距精度,且在各种短路情况下依然具有较高的精度,满足工程实际的要求。
Since the fault of the distribution network may bring great harm to the national economy,a fault location and ranging module combining intelligent control terminal is introduced,and its improved fault ranging method is studied. The doubleended ranging method is used to locate the fault point by means of comparing the conventional ranging methods. In order to improve the accuracy of the measuring results,the data is processed by the full-cycle Fourier algorithm with differential link and FIR filtering link. The established original model is extended. The simulation results of Matlab show that the method has high reliability and ranging accuracy,especially in a variety of short-circuit cases,and can meet the actual project requirements.
Since the fault of the distribution network may bring great harm to the national economy,a fault location and ranging module combining intelligent control terminal is introduced,and its improved fault ranging method is studied. The doubleended ranging method is used to locate the fault point by means of comparing the conventional ranging methods. In order to improve the accuracy of the measuring results,the data is processed by the full-cycle Fourier algorithm with differential link and FIR filtering link. The established original model is extended. The simulation results of Matlab show that the method has high reliability and ranging accuracy,especially in a variety of short-circuit cases,and can meet the actual project requirements.
引文
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[8]王旭东.含分布式电源的配电网故障录波器测距方法[D].济南:山东大学,2015.WANG Xudong. Ranging method of fault recorder in distributed network containing distributed power[J]. Jinan:Shandong University,2015.
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[2]唐成虹,杨志宏,宋斌,等.有源配电网的智能分布式馈线自动化实现方法[J].电力系统自动化,2015,39(9):101-106.TANG Chenghong,YANG Zhihong,SONG Bin,et al. Intelligent distributed feeder automation method for active distribution network[J]. Automation of electric power systems,2015,39(9):101-106.
[3]杜林,陈宏业,陈伟根,等.采用双端电压行波法的输电线路故障定位系统设计[J].高电压技术,2013,37(2):304-309.DU Lin,CHEN Hongye,CHEN Weigen,et al. Transmission line fault location system using two-terminal voltage traveling wave[J]. High voltage engineering,2013,37(2):304-309.
[4]梁志瑞,穆毓,牛胜锁,等.一种小电流接地系统单相接地故障测距新方法[J].电力系统自动化,2009,33(5):66-70.LIANG Zhirui,MU Yu,NIU Shengsuo,et al. A new fault location method for single phase to ground faults in the small current neutral grounding system[J]. Automation of electric power systems,2009,33(5):66-70.
[5]李振兴,王新,田斌,等.基于沿线电压分布规律的快速故障测距[J].电工技术学报,2018,33(1):112-120.LI Zhenxing,WANG Xin,TIAN Bin,et al. A fast fault location method based on distribution voltage regularities along transmission line[J]. Transactions of China electrotechnical society,2018,33(1):112-120.
[6]何哲,王瑞峰,郝溪.含分布式电源配电网单相接地故障测距研究[J].郑州大学学报(理学版),2016,48(1):85-90.HE Zhe,WANG Ruifeng,HAO Xi. Study on single phase ground fault location based on distributed generation power distribution network[J]. Journal of Zhengzhou University(Natural Science Edition),2016,48(1):85-90.
[7]康忠健,田爱娜,冯艳艳.含DG配电网故障测距技术综述[J].电网与清洁能源,2013,29(4):6-12.KANG Zhongjian,TIAN Aina,FENG Yanyan. A review of fault location technology in distribution network with DG[J].Power system and clean energy,2013,29(4):6-12.
[8]王旭东.含分布式电源的配电网故障录波器测距方法[D].济南:山东大学,2015.WANG Xudong. Ranging method of fault recorder in distributed network containing distributed power[J]. Jinan:Shandong University,2015.
[9] BAK C L,BORGHETTI A,GLASDAM J,et al. Vacuum circuit breaker modelling for the assessment of transient recovery voltages:application to various network configurations[J]. Electric power systems research,2018,156:35-43.
[10]陈冲.多分辨形态学梯度:相关函数理论在特高压直流输电线路故障测距上的应用[D].济南:山东大学,2017.CHEN Chong. Application of multiresolution morphological gradient correlation function theory to fault location of UHV direct current transmission line[D]. Jinan:Shandong University,2017.
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