基于方向行波能量的小电流接地系统故障选线方法

doi:10.19595/j.cnki.1000-6753.tces.200880

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1655 KB) HTML
输出: BibTeX | EndNote (RIS)

摘要现有行波选线方法易受到高阻接地、行波全反射、噪声及其他恶劣接地条件的影响,存在灵敏度和准确度不高的问题。据此提出一种利用故障电流方向行波能量的配电线路接地选线方法。该方法选取各线路一定数据窗的暂态零序方向电流波形,对其经小波分解得到相应频带系数,利用所得系数和波阻抗的组合可求得各线路方向行波能量,根据方向行波能量的大小关系合理地构造判据表达式,充分利用故障信息,最大限度地放大故障支路与健全支路的区分度,使得故障线路可靠识别。理论分析、仿真和实测结果均表明,该选线方法对选线的灵敏度和准确度有较大提升。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	王建元
	朱永涛
	秦思远

关键词 ：选线灵敏度, 方向行波能量, 高阻接地, 配电系统, 单相接地故障, 中性点非有效接地

Abstract：Existing traveling wave line selection methods are easily affected by high-resistance grounding, traveling wave total reflection, noise, and other harsh grounding conditions, so it has defect of low sensitivity and accuracy. Accordingly, propose a new method of grounding line selection for distribution lines by using the energy of the fault current direction traveling wave. This method, by selecting the transient zero-sequence directional current waveform of a certain data window of each line, obtains the corresponding frequency band coefficient through wavelet decomposition, the combination of the obtained coefficient and the wave impedance can be used to obtain the directional traveling wave energy in each line, the size relationship is reasonable to construct the criterion expression, the fault information is fully utilized, and the distinction between the faulty branch and the healthy branch is maximized, the fault line can be identified reliably. According to theoretical analysis, simulation and actual measurement results, this method increases the application range of the traveling wave line selection method, the sensitivity and accuracy of line selection are greatly improved by this method.

Key words： Line selection sensitivity direction traveling wave energy high resistance grounding power distribution system single phase ground fault neutral point non-effective grounding

收稿日期: 2020-07-19

PACS:

TM773

通讯作者: 朱永涛男,1994年生,硕士研究生,研究方向为配电网单相接地故障选线与定位。E-mail：zytmyys@163.com

作者简介: 王建元男,1971年生,教授,硕士生导师,研究方向为计算机在电力系统中的应用、电力电子技术在电力系统中的应用和电能质量控制技术等。E-mail：wangjy@neepu.edu.cn

引用本文:

王建元, 朱永涛, 秦思远. 基于方向行波能量的小电流接地系统故障选线方法[J]. 电工技术学报, 2021, 36(19): 4085-4096. Wang Jianyuan, Zhu Yongtao, Qin Siyuan. Fault Line Selection Method for Small Current Grounding System Based on Directional Traveling Wave Energy. Transactions of China Electrotechnical Society, 2021, 36(19): 4085-4096.

链接本文:

https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.200880 https://dgjsxb.ces-transaction.com/CN/Y2021/V36/I19/4085

[1] 郭丽伟, 薛永端, 徐丙垠, 等. 中性点接地方式对供电可靠性的影响分析[J]. 电网技术, 2015, 39(8): 2340-2345.
Guo Liwei, Xue Yongduan, Xu Bingyin, et al.Research on effects of neutral grounding modes on power supply reliability in distribution networks[J]. Power System Technology, 2015, 39(8): 2340-2345.
[2] 徐丙垠, 薛永端, 冯光, 等. 配电网接地故障保护若干问题的探讨[J]. 电力系统自动化, 2019, 43(20): 1-7.
Xu Bingyin, Xue Yongduan, Feng Guang, et al.Discussion on several problems of earthing fault protection in distribution network[J]. Automation of Electric Power Systems, 2019, 43(20): 1-7.
[3] 刘健, 张志华, 李云阁, 等. 基于故障相接地的配电网单相接地故障自动处理[J]. 电力系统自动化, 2020, 44(12): 169-177.
Liu Jian, Zhang Zhihua, Li Yunge, et al.Automatic processing of single-phase grounding fault in distribution network based on fault phase grounding[J]. Automation of Electric Power Systems, 2020, 44(12): 169-177.
[4] 龙毅, 欧阳金鑫, 熊小伏, 等. 基于零序功率变化量的配电网单相高阻接地保护[J]. 电工技术学报, 2019, 34(17): 3687-3695.
Long Yi, Ouyang Jinxin, Xiong Xiaofu, et al.Protection principle of single-phase high resistance fault for distribution network based on zero-sequence power variation[J]. Transactions of China Electrotechnical Society, 2019, 34(17): 3687-3695.
[5] Ghaderi A, Mohammadpour H A, Ginn H L, et al.High-impedance fault detection in the distribution network using the time-frequency-based algorithm[J]. IEEE Transactions on Power Delivery, 2015, 30(3): 1260-1268.
[6] 董俊, 李一凡, 束洪春, 等. 配电网馈出线路单相永久性接地故障性质辨识方法[J]. 电工技术学报, 2020, 35(21): 4576-4585.
Dong Jun, Li Yifan, Shu Hongchun, et al.Study on identification method of single phase permanent ground fault in distribution network feedout line[J]. Transactions of China Electrotechnical Society, 2020, 35(21): 4576-4585.
[7] 林湘宁, 高艳, 刘沛, 等. 基于零序补偿导纳的小电流接地系统单相故障保护新方法[J]. 中国电机工程学报, 2006, 26(10): 45-49.
Lin Xiangning, Gao Yan, Liu Pei, et al.A novel method to identify the single phase-to-earth fault in the neutral un-effectual grounded system using the zero modulus compensated admittance[J]. Proceedings of the CSEE, 2006, 26(10): 45-49.
[8] 金涛, 褚福亮. 基于暂态非工频零序电流的含DG新型配电网的接地选线方法[J]. 电工技术学报, 2015, 30(17): 96-105.
Jin Tao, Chu Fuliang.A fault line-selection method in new distribution network with DG based on transient non-power frequency zero sequence current[J]. Transactions of China Electrotechnical Society, 2015, 30(17): 96-105.
[9] 刘渝根, 王建南, 米宏伟, 等. 10kV配电网中性点接地方式的优化研究[J]. 高电压技术, 2015, 41(10): 3355-3362.
Liu Yugen, Wang Jiannan, Mi Hongwei, et al.Optimization research on neutral grounding mode of 10kV distribution networks[J]. High Voltage Engineering, 2015, 41(10): 3355-3362.
[10] 周兴达, 陆帅. 一种基于消弧线圈和静止同步补偿器协同作用的配电网消弧结构与方法[J]. 电工技术学报, 2019, 34(6): 1251-1262.
Zhou Xingda, Lu Shuai.An arc-suppression method based on the coordinated operation of the petersen coil and the static synchronous compensator in distribution networks[J]. Transactions of China Electrotechnical Society, 2019, 34(16): 1251-1262.
[11] 董新洲, 毕见广. 配电线路暂态行波的分析和接地选线研究[J]. 中国电机工程学报, 2005, 25(4): 3-8.
Dong Xinzhou, Bi Jianguang.Analysis on transient traveling wave and study on fault line selection for distribution lines[J]. Proceedings of the CSEE, 2005, 25(4): 3-8.
[12] 郑玉平, 司鑫尧, 吴通华, 等. 特高压半波长交流输电线路的行波保护[J]. 电力系统自动化, 2020, 44(18): 124-131.
Zheng Yuping, Si Xinyao, Wu Tonghua, et al.Travelling wave protection of UHV half-wavelength AC transmission lines[J]. Automation of Electric Power Systems, 2020, 44(18): 124-131.
[13] 董新洲, 周双喜. 单相接地故障行波分析[J]. 电力系统自动化, 2005, 29(23): 29-32.
Dong Xinzhou, Zhou Shuangxi.Analysis of single-phase-to-ground fault generated traveling waves[J]. Automation of Electric Power Systems, 2005, 29(23): 29-32.
[14] 施慎行, 董新洲. 基于单相电流行波的故障选线原理研究[J]. 电力系统保护与控制, 2008, 36(14): 13-16.
Shi Shenxing, Dong Xinzhou.Study of fault line selection using single-phase current traveling waves[J]. Power System Protection and Control, 2008, 36(14): 13-16.
[15] 毕见广, 董新洲, 周双喜. 基于两相电流行波的接地选线方法[J]. 电力系统自动化, 2005, 29(3): 17-20.
Bi Jianguang, Dong Xinzhou, Zhou Shuangxi.Fault line selection based on two-phase current traveling wave[J]. Automation of Electric Power Systems, 2005, 29(3): 17-20.
[16] 张帆, 潘贞存, 张慧芬, 等. 基于方向行波的小电流接地系统故障选线[J]. 中国电机工程学报, 2007, 27(34): 70-75.
Zhang Fan, Pan Zhencun, Zhang Huifen, et al.Fault line selection in non-solidly earthed network based on direction traveling wave[J]. Proceedings of the CSEE, 2007, 27(34): 70-75.
[17] Zou G B, Gao H L.Fast pilot protection method based on waveform integral of traveling wave[J]. International Journal of Electrical Power & Energy Systems, 2013, 50(1): 1-8.
[18] 姜博, 董新洲, 施慎行. 基于单相电流行波的配电线路单相接地故障选线方法[J]. 中国电机工程学报, 2014, 34(34): 6216-6227.
Jiang Bo, Dong Xinzhou, Shi Shenxing.A method of single phase to ground fault feeder selection based on single phase current traveling wave for distribution lines[J]. Proceedings of the CSEE, 2014, 34(34): 6216-6227.
[19] 方毅, 薛永端, 宋华茂, 等. 谐振接地系统高阻接地故障暂态能量分析与选线[J]. 中国电机工程学报, 2018, 38(19): 5636-5645.
Fang Yi, Xue Yongduan, Song Huamao, et al.Transient energy analysis and faulty feeder identification method of high impedance fault in the resonant grounding system[J]. Proceedings of the CSEE, 2018, 38(19): 5636-5645.
[20] 要焕年, 曹梅月. 电力系统谐振接地[M]. 北京: 中国电力出版社, 2000.
[21] 邬林勇, 何正友, 钱清泉. 一种提取行波自然频率的单端故障测距方法[J]. 中国电机工程学报, 2008, 28(10): 69-75.
Wu Linyong, He Zhengyou, Qian Qingquan.A single ended fault location method using traveling wave natural frequency[J]. Proceedings of the CSEE, 2008, 28(10): 69-75.
[22] 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.
[23] 汪梅, 朱亮, 张国强, 等. 基于小波能量谱的T型线路故障定位新算法[J]. 振动•测试与诊断, 2018, 38(3): 479-485.
Wang Mei, Zhu Liang, Zhang Guoqiang, et al.A new T-line fault location algorithm based on wavelet energy spectrum[J]. Journal of Vibration, Measurement & Diagnosis, 2018, 38(3): 479-485.
[24] Jia Huibin, Ruben S.An improved traveling-wave-based fault location method with compensating the dispersion effect of traveling wave in wavelet domain[J]. Mathematical Problems in Engineering, 2017, 2017( Article ID 1019591): 1-11.
[25] 陈乐, 彭咏泉, 林湘宁, 等. 面向接地故障辨识的半波长线路测距式超高速就地主保护新原理研究[J]. 电工技术学报, 2019, 34(24): 5234-5243.
Chen Le, Peng Yongquan, Lin Xiangning, et al.New ultra high speed local measurement-based protection principle for half-wave transmission line ground fault identification[J]. Transactions of China Electrotechnical Society, 2019, 34(24): 5234-5243.
[26] 李学生, 盛洪江. 基于波速影响的零模行波研究[J]. 电力自动化设备, 2011, 31(6): 93-97.
Li Xuesheng, Sheng Hongjiang.Study of zero-mode traveling wave based on influence of wave velocity[J]. Electric Power Automation Equipment, 2011, 31(6): 93-97.
[27] 熊列彬, 吴高华, 王志洋. 基于IHHT的多测点行波法故障测距在全并联AT牵引网中的研究[J]. 电工技术学报, 2019, 34(15): 3244-3252.
Xiong Liebin, Wu Gaohua, Wang Zhiyang.Study on fault location of multi measuring points traveling wave method based on IHHT in all parallel AT traction network[J]. Transactions of China Electrotechnical Society, 2019, 34(15): 3244-3252.
[28] 季涛. 利用电磁式电压互感器实现小电流接地系统行波故障定位和选相[J]. 电工技术学报, 2012, 27(8): 172-178.
Ji Tao.Study of the fault location and fault phase position selection based on traveling waves using electromagnetic voltage transformer in neutral non-effective grounding system[J]. Transactions of China Electrotechnical Society, 2012, 27(8): 172-178.
[29] 王楠, 律方成. 基于小波奇异性检测的在线监测数据处理[J]. 电工技术学报, 2003, 18(4): 61-64.
Wang Nan, Lü Fangcheng.On-line monitoring data processing based on wavelet singularity detection[J]. Transactions of China Electrotechnical Society, 2003, 18(4): 61-64.
[30] 董新洲, 王世勇, 施慎行. 极化电流行波方向继电器[J]. 电力系统自动化, 2011, 35(21): 78-83.
Dong Xinzhou, Wang Shiyong, Shi Shenxing.Polarized current travelling-wave based directional relay[J]. Automation of Electric Power Systems, 2011, 35(21): 78-83.
[31] 王世勇, 董新洲, 施慎行. 极化电流行波方向继电器的实现方案[J]. 电力系统自动化, 2011, 35(23): 76-81.
Wang Shiyong, Dong Xinzhou, Shi Shenxing.Realization scheme of polarized current traveling-wave based directional relay[J]. Automation of Electric Power Systems, 2011, 35(23): 76-81.
[32] 王珺, 董新洲, 施慎行. 配电线路单相接地行波保护的实现与试验[J]. 中国电机工程学报, 2013, 33(13): 172-178.
Wang jun, Dong Xinzhou, Shi Shenxing. Scheme and test of traveling-waves based single-phase-to-ground protection for distribution lines[J]. Proceedings of the CSEE, 2013, 33(13): 172-178.