辐射状配电网接地故障诊断方法研究
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摘要
快速、准确的故障定位是迅速隔离故障和恢复供电的前提,对于维护配电网的安全运行具有重要意义。而配电网的单相接地故障定位长期以来是难以解决的课题。论文对国内外关于该课题的现有的各种研究情况做了全面深入的分析,在此基础上从接地故障测距算法和在线监测两方面进行了研究。
     基于对配电网发生单相接地故障后的故障主要特征的分析,论文应用加信诊断方法,提出了相应的接地故障定位算法。首先论文对三相均匀换位线路的故障定位进行了公式推导和数值计算分析,并在频域内对故障函数的频谱曲线幅值、相角和频率特性进行了分析,提出了相应的故障定位判据。经过数值仿真计算分析表明,该方法对直配线的接地故障定位是有效的,对树形多分支线路的故障定位理论上也是可行的,但实际应用中还有许多重要问题需要进一步深入研究。其次论文基于辐射状馈线的任一分支线路发生接地故障,通过分析与推导,建构了配电线路单相短路点定位的故障定位函数和相应的故障判据,利用树网单端信息完成故障分支识别、故障定位和过渡电阻定值。大量故障测距的数值仿真计算分析表明,该方法对配电网的接地故障定位是有效的。基于此论文还编制了单相接地故障定位的计算机通用程序。该测距算法不受负载参数变化的影响,不受接地过渡电阻值大小的影响。利用馈线首端测量信息实现故障测距,测距装置不需通信,不需实时监测,实际应用成本较低,因此具有较好的发展前景。
     可实现接地故障区段自动检测与隔离的馈线自动化技术是配电网自动化的发展方向。通过对配电网发生单相接地故障后馈线的电压、电流变化规律的分析,论文提出了基于馈线现场监控终端FTU的故障点智能定位方法。该方法以馈线电压变化量为故障点定位的主要判据进行故障点自动监测与定位,并迅速隔离故障区段,恢复正常区段的供电。该方法与单独采用电流的电流型方法相比,可靠性更高,且不受系统接地方式的影响,能适用于较复杂的网络结构。
Quick and accurate fault location is the premise to rapidly isolate the fault and redelivery power supply, and it is important to the normal working of power networks. Line-to-ground fault location maintains unresolved to power distribution networks for a long time. After a comprehensive analysis of existing methods, the author made a thorough study with the on-line monitoring method and a fault location algorithm.
    Based on the main fault-character analysis of single line-to-ground fault in non-grounded distribution networks, the location algorithms by injecting current are proposed for diagnosing and locating faults. Firstly, a relevant algorithm is presented for locating single-line-to-ground(SLG) fault in distribution networks, fault functions are reasoned out and analyzed for single-phase and three-phase distribution lines, and criterion measure, which are based on the frequency, phase and shape characteristics of the fault function spectrums , are also presented for locating SLG faults. Computer simulation shows that the criterion measure effectively locates faults in direct distribution line, and it is also feasible to tree-type distribution system in theory but there are still some problems in practice. In the next place, an improved algorithm of grounding fault location for tree-type distribution system which is based on new fault function and criterion measure, is proposed in order to complete fault branch ide
    ntification, fault location and fault value. A lot of the simulation of fault diagnosis and location by computer demonstrate that the algorithm is effective. Universal computer program of locating SLG faults in distribution networks is worked but based on the algorithm. Since it is immune to load change, immune to the value of grounded resistance change and its parameters can be easily measured, the fault location algorithm can be widely applied to the power distribution networks.
    Feeder automation, which can automatically detect and isolate the ground-faulty section, is the direction distribution automation made progress to. An automatic fault location method is proposed based on FTU after the circuit analysis of single line-to-ground fault in distribution networks. In the method zero sequence voltage is discussed and new principle for automatic fault location and isolation based on the zero sequence voltage is presented in this paper. Compare to the traditional current methods, this method is not only immune from neutral grounding modes, but also more bearable to interference.
引文
[1] 要焕年,曹梅月.城市中压电网运行特性的优化[J].中国电力,1998,Vol.31(10):23~24,55.
    [2] 曾祥君,尹项根,张哲,等.配电网接地故障负序电流分布及接地保护原理研究[J].中国电机工程学报,2001,Vol.21(6),84~89.
    [3] 卫志农,刘劲,唐勇.小电流接地系统单相接地故障定位研究[J].江苏电机工程,1999,Vol.18(4):19~31,41.
    [4] 张兆宁,毛鹏,郁惟镛,等.时间序列小波神经网络在故障测距中的应用[J].中国电机工程学报,2001,Vol.21(6):66~71.
    [5] 郝玉山,杨以涵,任天恒,等.小电流接地微机选线的群体比幅比相原理[J].电力情报.1994,(2):15~19.
    [6] 贺家李,宋从柜.电力系统继电保护原理(第二版)[M].北京:中国电力出版社,2001,56~64.
    [7] 张树文.小电流接地系统单相保护原理和技术综述[J].电力情报,1994,(7):1~5.
    [8] 张慧芬,王慧,王恩起,等.谐振接地与“S注入法”选线定位[J].电力设备,2001,Vol.2(2),26~28.
    [9] 王慧 范正林 桑在中.“S注入法”与选线定位[J].电力自动化设备,1999,Vol.19(3):18~20.
    [10] 王新超,桑在中.基于“S注入法”的一种故障定位新方法[J].继电器,2001,Vol.29(7):9~12.
    [11] 马佳,余文辉,车伟扬,等.基于改进的S注入法的新型树状配电网故障检测装置[J].继电器,2002,Vol.30(10):51~54.
    [12] S. Navaneethan, J. J. Soraghan, W. H. Siew, et al. Automatic fault location for underground low voltage distribution networks[J]. IEEE Trans. on Power Delivery, Vol. 16,No. 2,April 2001, pp. 346~351.
    [13] S. Navaneethan, J. J. Soraghan, W. H. Siew, et al. An automatic fault detection and location technique in low voltage distribution networks [J]. Proc. of energy management and Power Delivery'98, Mar. 1998, pp. 732~736.
    [14] F. H. Magnago, A. Abur. Fault location using wavelets[J]. IEEE Trans. on Power Delivery, Vol. 13, no. 4, pp. 1475~1480, Oct. 1998.
    
    
    [15] 林功平.配电网馈线自动化解决方案的技术策略[J].电力系统自动化,2001,Vol.25(7):52~55.
    [16] 王章启,潘思谦.当前配电网自动化建设中的几个问题[J].电网技术,1999,Vol.23(10):65~67.
    [17] 陈勇,海涛,稻叶正明.构筑配电网自动化系统的三种基本模式[J].电网技术,2002,Vol.26(2):67~68.
    [18] 孙福杰.王刚军,李江林.配电网馈线自动化故障处理模式的比较及优化[J].继电器2001,Vol.29(8),17~20.
    [19] 林功平.配电网馈线自动化技术及其应用[J].电力系统自动化,1998,Vol.22(4)64~68.
    [20] 牛培峰,刘振亚,伊昌新,等,配电管理及配电自动化系统实施中的关键问题[J].电网技术,2000,Vol.24(11):37~40.
    [21] 吴敏,朱锡贵,徐为纲,等.无信道馈线故障处理技术[J].电力系统自动化,2000,Vol.24(12):39~41.
    [22] 孙福杰,何俊佳,邹积岩,等.基于重台器和分段器的10kv环网供电技术的研究与应用[J].电网技术,2000,Vol.24(7):33~36.
    [23] 轰钦成.配电系统故障隔离和恢复供电新方案研究与实施[M].中国供电国际会议论文集,2000,10.
    [24] 薛永断,吴敏,王俊江,等.一种电压型配电网单相接地故障处理方法[J].电力系统自动化,2002,Vol.26(12):68~71.
    [25] V. E. Kachesov, A.G. Ovsajnnikov, V. U. Lavrov. Outcomes of overvoltage monitoring and fault location in underground distribution networks[J]. Proceedings of the 6th Russian-Korean International Symposium on Science and Technology, KORUS'2002, pp. 447~451.
    [26] 施慎行,董新洲,刘建政,等.配电线路无通道保护研究[J].电力系统自动化,2001,Vol.25(6):31~34.
    [27] 潘贞存,桑在中,张尔桦,等.配电线路全线速切保护的可行性研究[J].继电器,1997,Vol.25(4):9~11.
    [28] 李孟秋,王耀南,王辉,等.小电流接地系统单相接地故障点探测方法的研究[J].中国电机工程学报,2001,Vol.21(10):6~9,23.
    [29] 郝玉山.基于面保护原理的配电网故障处理[M].中国供电国际会议论文集,2000,10.
    [30] P. Bastard, L. Garcia-Santander, X. Le Pivert, et al. A Voltage-based fault location method for radial distribution networks [J]. Power System Management
    
    and Control, pp. 17-19 April 2002 Conference Publication No. 488, 2002, pp. 216-221.
    [31] 朱锡贵,国志宏,贾明泉.有信道馈线故障处理技术[J].电力系统自动化,2000,Vol.23(10):33~35.
    [32] Zhu J, Lubkeman D, Girgis A. Automated fault location and diagnosis on electric power distribution feeders[J]. IEEE Trans. on Power Delivery, 1997, Vol. 12(2): 801-809.
    [33] 刘健,倪建立,杜宇.配电网故障区段判断和隔离的统一算法[J].电力系统自动化,1999,Vol.23(1):31~33.
    [34] 朱发国,孙德胜,姚玉斌,等.基于现场监控终端的线路故障定位优化矩阵算法[J].电力系统自动化,2000,Vol.24(15):42~44.
    [35] 刘伟,郭志忠.配电网故障区间判断的新型矩阵算法[J].电力系统自动化,2002,Vol.26(18):21~24.
    [36] 刘健,王兆安.配电网故障区域判断和隔离[J].西安交通大学学报,2000,Vol.34(2):7~10.
    [37] Jun Zhu, David L Lubkeman, Adly A Girgis. Automated fault location and diagnosis on electric power distribution feeders[J]. IEEE trans.on PWRD. 1997,12(2): 801~809.
    [38] 刘健.变结构耗散网络[M].北京:中国水利水电出版社,2000,31~46.
    [39] 林景栋,曹长修,张帮礼,等.基于拓扑辨识的配电网故障定位算法[J].重庆大学学报,2001,Vol.24(5):51~54.
    [40] 刘健,程红丽,董海鹏,等.配电网故障判断与负荷均衡化[J].电力系统自动化,2002,Vol.26(22):34~38.
    [41] 杜红卫,孙雅明,刘宏靖,等.基于遗传算法的配电网故障定位和隔离[J].电网技术,2000.Vol.24(5):52~55.
    [42] 卫志农,何桦,郑玉平.配电网故障区间定位的高级遗传算法[J].中国电机工程学报,2002,Vol.22(4):127~130.
    [43] 费军,单渊达.配电网自动故障定位系统的研究[J].中国电机工程学报,2000.Vol.20(9):32~35.
    [44] 毕天姝,倪以信,吴复立,等.基于新型神经网络的电网故障诊断方法[J].中国电机工程学报,2002,Vol.22(2):73~78.
    [45] 范春菊,郁惟镛.专家系统方法在配电网输电线路故障测距中的应用[J].继电器,2001,Vol.29(10):5~8.
    [46] Yuan-Yih Hsu, F C Lu, Y Chien. An expert system for locating distribution
    
    system faults[J]. IEEE Transaction on Power Delivery, 1991,6(1):366~372.
    [47] 刘万顺.电力系统故障分析[M].北京:中国电力出版社,1998,11.
    [48] 吴维韩,张芳榴.电力系统过电压数值计算[M].北京:科学出版社,1989.
    [49] 侯自力,彭兰芳.数枝型配电网短路故障的端口比值分支定位法[J].电子科学学刊,1990,Vol.12(6):641~645.
    [50] 束洪春,许承斌,徐贤敏,等.10kV或6kV直配线路单相接地故障测距的新算法[J].中国电机工程学报,1995,Vol.15(5):423~428.
    [51] 束洪春.基于分布参数线路模型的架空电力线路故障测距方法研究[M].哈尔滨:哈尔滨工业大学博士论文,1997,6.
    [52] 刘健,倪建立,徐龙斌.配电网自动化系统的组织[J].电网技术,1998,Vol.22(8):27~30,33.
    [53] 焦邵华,焦燕莉,程利军,等.馈线自动化的最优控制模式[J].电力系统自动化,2002,Vol.26(21):49~52.
    [54] 林功平.配电自动化与10智能化开关[J].电力系统自动化,2002,Vol.26(11):70~72.
    [55] 林苹,吴翊.远程馈线智能终端单元的研制[J].高压电器,2002,Vol.38(2):22~25.
    [56] 刘健,倪建立,邓永辉.配电自动化系统[M].北京:中国水利水电出版社,1998.
    [57] 方富淇.配电网自动化[M].北京:中国电力出版社,2000,8.

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