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| A Method of Fault Line Selection in Resonant Earthed System Based on Zero Sequence Impedance Characteristic of Lines |
| Tang Tao, Huang Chun, Jiang Yaqun, Luo Xunhua, Liu Penghui |
| School of Electrical and Information Engineering Hunan University Changsha 410082 China |
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Abstract After the single phase ground fault occurred in the resonant ground distribution network, the zero sequence impedance of the sound line shows capacitance characteristic under the circumstance that the frequency is below the minimum series resonant frequency. However, the zero sequence impedance of the faulty line presents capacitance characteristic in the high frequency and inductance characteristic in the low frequency. In terms of the phenomena above, a faulty line selection method based on zero sequence impedance characteristics of lines is proposed. The high and low frequency components of the bus zero sequence voltage and each feeder zero sequence current are extracted through low-pass and band-pass digital filters. And then the high and low frequency components of the bus zero sequence voltage are derived separately. Since the ratio between the voltage derivative and the current in the capacitive circuit is constant, the ratios between the bus zero sequence voltage derivative and the zero current of the sound line are same both in the high and the low frequencies theoretically. The actual difference of these two ratios is almost zero. Whereas, the ratios between the bus zero sequence voltage derivative and the zero current of the faulty line are different both in the high and the low frequencies, and the difference is greater. Therefore, a faulty line selection criterion is proposed. The method is proved to be accurate, reliable and adaptable through the theory and simulations.
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Received: 30 November 2015
Published: 01 November 2016
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[1] 薛永端, 徐丙垠, 冯祖仁, 等. 小电流接地故障暂态方向保护原理研究[J]. 中国电机工程学报, 2003, 23(7): 51-56.
Xue Yongduan, Xu Bingyin, Feng Zuren, et al. The principle of directional earth fault protection using zero sequence transients non-solid earthed network[J]. Proceedings of the CSEE, 2003, 23(7): 51-56.
[2] 王朋, 田翠华, 陈柏超, 等. 基于新型磁控消弧线圈的电磁混合消弧及配合选线新方法[J]. 电工技术学报, 2015, 30(16): 173-183.
Wang Peng, Tian Cuihua, Chen Baichao, et al. Electromagnetic hybrid arc suppression and a novel method of feeder selection based on the novel magnetic controlled Petersen coil[J]. Transactions of China Electrotechnical Society, 2015, 30(16): 173- 183.
[3] 张钧, 刘洪星, 何正友, 等. 基于瞬时能量函数的故障选线新方法[J]. 电力系统保护与控制, 2012, 40(14): 1-9.
Zhang Jun, Liu Hongxing, He Zhengyou, et al. A novel fault line identification approach based on instantaneous energy function[J]. Power System Protection and Control, 2012, 40(14): 1-9.
[4] 张淑清, 马跃, 李盼, 等. 基于改进的广义谐波小波包分解和混沌振子的小电流接地系统故障选线[J]. 电工技术学报, 2015, 30(3): 13-20.
Zhang Shuqing, Ma Yue, Li Pan, et al. Application of improved generalized harmonic wavelet packet decomposition and chaos oscillator to fault line detection in small current grounding system[J]. Transactions of China Electrotechnical Society, 2015, 30(3): 13-20.
[5] 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.
[6] 司瑞琦, 黄翰, 罗建, 等. 基于消弧线圈补偿特征的故障选线新方法[J]. 电力系统保护与控制, 2014, 42(23): 16-22.
Si Ruiqi, Huang Han, Luo Jian, et al. Fault line selection approach based on compensation character- ristic of extinction coil[J]. Power System Protection and Control, 2014, 42(23): 16-22.
[7] 赖平, 周想凌, 邱丹. 小电流接地系统暂态电流频率特性分析及故障选线方法研究[J]. 电力系统保护与控制, 2015, 43(4): 51-57.
Lai Ping, Zhou Xiangling, Qiu Dan. Research on transient-current frequency analysis and faulty line detecting method in indirectly grounding power system[J]. Power System Protection and Control, 2015, 43(4): 51-57.
[8] 张伟刚, 张保会, 胡海松. 应用小波包分析实现配电网单相接地故障选线[J]. 电力系统自动化, 2009, 33(23): 60-64.
Zhang Weigang, Zhang Baohui, Hu Haisong. Application of wavelet packet analysis in phase- to-ground fault detection of distribution networks[J]. Automation of Electric Power System, 2009, 33(23): 60-64.
[9] 吴乐鹏, 黄纯, 林达斌, 等. 基于暂态小波能量的小电流接地故障选线新方法[J]. 电力自动化设备, 2013, 33(5): 70-75.
Wu Lepeng, Huang Chun, Lin Dabin, et al. Faulty line selection based on transient wavelet energy for non-solid-earthed network[J]. Electric Power Auto- mation Equipment, 2013, 33(5): 70-75.
[10] 戴剑锋, 张艳霞, 侯喆. 小波重构算法在配电网接地选线中的应用[J]. 电网技术, 2004, 28(3): 43-47.
Dai Jianfeng, Zhang Yanxia, Hou Zhe. Application of wavelet reconstruction algorithm in phase-to-ground fault detection of distribution networks[J]. Power System Technology, 2004, 28(3): 43-47.
[11] 束洪春, 刘娟, 司大军, 等. 自适应消弧线圈接地系统故障选线实用新方法[J]. 电力系统自动化, 2005, 29(13): 64-68.
Shu Hongchun, Liu Juan, Si Dajun, et al. New adaptive method for fault line selection in non-solidly grounded system[J]. Automation of Electric Power System, 2005, 29(13): 64-68.
[12] 李森, 宋国兵, 康小宁, 等. 基于时域下相关分析法的小电流接地故障选线[J]. 电力系统保护与控制, 2008, 36(13): 15-20.
Li Sen, Song Guobing, Kang Xiaoning, et al. Time-domain fault line selection based on correlation analysis in neutral indirect ground system[J]. Power System Protection and Control, 2008, 36(13): 15-20.
[13] 束洪春, 彭仕欣, 李斌, 等. 基于零序电流激励的谐振接地系统故障选线测后模拟方法[J]. 电工技术学报, 2008, 23(10): 106-113.
Shu Hongchun, Peng Shixin, Li Bin, et al. Simulation after detecting fault line in resonant earthed system through zero sequence current motivation[J]. Transa- ctions of China Electrotechnical Society, 2008, 23(10): 106-113.
[14] 刘谋海, 方涛, 姜运, 等. 基于暂态主频分量相关分析的故障选线方法[J]. 电力系统保护与控制, 2016, 44(2): 74-79.
Liu Mouhai, Fang Tao, Jiang Yun, et al. A new correlation analysis approach to fault line selection based on transient main-frequency components[J]. Power System Protection and Control, 2016, 44(2): 74-79.
[15] 庞清乐, 孙同景, 钟麦英, 等. 基于粗集理论的小电流接地系统故障选线[J]. 中国电机工程学报, 2007, 27(4): 60-64.
Pang Qingle, Sun Tongjing, Zhong Maiying, et al. Fault line detection based on rough set theory in indirectly grounding power system[J]. Proceedings of the CSEE, 2007, 27(4): 60-64.
[16] 高艳, 林湘宁, 刘沛, 等. 基于广义形态开闭变换的小电流接地选线算法[J]. 中国电机工程学报, 2006, 26(14): 1-6.
Gao Yan, Lin Xiangning, Liu Pei, et al. Generalized morphological opening-closing transform based feeder selection algorithm for neutral un-effectual grounded system[J]. Proceedings of the CSEE, 2006, 26(14): 1-6.
[17] 李雅洁, 孟晓丽, 宋晓辉, 等. 基于最优FIR滤波器与层次聚类的配电网单相接地故障选线方法[J]. 电网技术, 2015, 39(1): 143-149.
Li Yajie, Meng Xiaoli, Song Xiaohui, et al. Single- phase-to-ground fault line detection for distribution network based on optimal finite impulse response filter and hierarchical clustering[J]. Power System Technology, 2015, 39(1): 143-149.
[18] 王兴国, 张举. 基于相关分析和模糊推理的故障选相元件[J]. 电网技术, 2006, 30(14): 93-97.
Wang Xingguo, Zhang Ju. A novel faulty phase selector based on correlation analysis and fuzzy reasoning[J]. Power System Technology, 2006, 30(14): 93-97.
[19] 牛云涛, 李华, 宋志宏, 等. 谐振接地系统多判据多周期信息融合故障选线方法[J]. 电工技术学报, 2015, 30(增1): 512-517.
Niu Yuntao, Li Hua, Song Zhihong, et al. Fault line selection for grounding power network in arc suppression coil based on information fusion[J]. Transactions of China Electrotechnical Society, 2015, 30(S1): 512-517.
[20] 薛永端, 冯祖仁, 徐丙垠. 中性点非直接接地电网单相接地故障暂态特性分析[J]. 西安交通大学学报, 2004, 38(2): 195-199.
Xue Yongduan, Feng Zhuren, Xu Bingyin. Analysis of transient characteristics of signals phase earth fault in non-solidly earthed network[J]. Journal of Xi’an Jiaotong University, 2004, 38(2): 195-199.
[21] 薛永端, 李娟, 徐丙垠. 中性点经消弧线圈接地系统小电流接地故障暂态等值电路及暂态分析[J]. 中国电机工程学报, 2015, 35(22): 5703-5714.
Xue Yongduan, Li Juan, Xu Bingyin. Transient equivalent circuit and transient analysis of single- phase earth fault in arc suppression coil grounded system[J]. Proceedings of the CSEE, 2015, 35(22): 5703-5714. |
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2016, Vol. 31 
