Study of the Fault Location and Fault Phase Position Selection Based on Traveling Waves Using Electromagnetic Voltage Transformer in Neutral Non-Effective Grounding System
Abstract:A new method using electromagnetic voltage transformers to transfer transient travelling waves is proposed to locating the line faults and identifies the faults type in neutral non-effective grounding system. Analysis model of electromagnetic voltage transformers for analyzing transform characteristics of traveling waves is built, and the transform characteristics is studied using parameters of practical voltage transformers. The results show that electromagnetic voltage transformers can transfer traveling waves surge effectively and meeting the needs of fault location. The transform characteristics and rules of travelling waves for three-phase electromagnetic voltage transformers are analyzed. The results show that there are certain rules for the transient traveling waves of single-phase earth fault and various short-circuit faults transferring to the secondary side of electromagnetic voltage transformers. On this basis, the principle and method that using the signals measured in the secondary side of electromagnetic voltage transformers to locate line faults point and judge the type of fault is proposed. Experimental tests verify the feasibility and correctness of the proposed method.
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. Transactions of China Electrotechnical Society, 2012, 27(8): 172-178.
[1] 徐丙垠, 李京, 陈平, 等. 现代行波测距技术及其应用[J]. 电力系统自动化, 2001, 25(23): 62-65. Xu Bingyin, Li Jing, Chen Ping, et al. Modern fault location techniques based on fault generated travelling waves and their applications[J]. Automation of Electric Power Systems, 2001, 25(23): 62-65. [2] 董新洲, 刘建政, 余学文. 输电线路暂态电压行波的故障特征及其小波分析[J]. 电工技术学报, 2001, 16(3): 57-61. Dong Xinzhou, Liu Jianzheng, Yu Xuewen. Fault characteristics and wavelets analysis of the transient voltage traveling waves[J]. Transactions of China Electrotechnical Society, 2001, 16(3): 57-61. [3] 和敬涵, 范瑜, 薄志谦, 等. 基于对称分量变换的暂态电流极性方向比较保护算法[J]. 电工技术学报, 2007, 22(2): 116-120. He Jinghan, Fan Yu, Bo Zhiqian, et al. Current traveling wave polarity comparisonal protection algorithm based on the transformation of symmetrical component[J]. Transactions of China Electrotechnical Society, 2007, 22(2): 116-120. [4] 张峰, 梁军, 杜涛, 等. T型线路的行波精确故障测距新方法[J]. 高电压技术, 2009, 35(3): 527-532. Zhang Feng, Liang Jun, Du Tao, et al. Accurate fault location algorithm based on traveling waves for teed- circuits[J]. High Voltage Engineering, 2009, 35(3): 527-532. [5] 季涛, 薛永端, 孙同景, 等. 配电线路行波故障测距初探[J]. 电力系统自动化, 2005, 29(19): 65-69. Ji Tao, Xue Yongduan, Sun Tongjing, et al. Fault location for distribution feeders based on traveling waves[J]. Automation of Electric Power Systems, 2005, 29(19): 65-69. [6] 季英业, 和敬涵. 基于小波变换的小电流接地系统的行波测距[J]. 高电压技术, 2004, 30(1): 13-18. Ji Yingye, He Jinghan. Fault distance measurement with traveling wave for the single-phase-to-ground fault in the neutral earthed system based on wavelet transform[J]. High Voltage Engineering, 2004, 30(1): 13-18. [7] 束洪春, 彭仕欣. 配电网络单相故障馈线的S变换检测新方法[J]. 高电压技术, 2009, 35(12): 2963- 2969. Shu Hongchun, Peng Shixin. S-transform approach for detecting the single-phase fault feeder in distribution network[J]. High Voltage Engineering, 2009, 35(12): 2963-2969. [8] 徐丙垠. 利用暂态行波的输电线路故障测距技术[D]. 西安: 西安交通大学, 1991. [9] 王瑞华. 脉冲变压器设计[M]. 北京: 科学出版社, 1987. [10] 姚伯威, 孙悦. 控制工程基础[M]. 北京: 国防工业出版社, 2004. [11] 王赞基, 郭静波. 电力线扩频载波通信技术及其应用[J]. 电力系统自动化, 2000, 24(21): 64-68. Wang Zanji, Guo Jingbo. Spread spectrum carrier power line communication and its applications[J]. Automation of Electric Power Systems, 2000, 24(21): 64-68. [12] 刘传彝. 电力变压器设计计算方法与实践[M]. 沈阳: 辽宁科学技术出版社, 2002. [13] A C夫兰克林, D P夫兰克林. 变压器全书[M]. 北京: 机械工业出版社, 1990.