Abstract：Taking Rogowski current transducers and capacitor-divider voltage transducers as examples, differential output principle of electronic transducers is derived. The new method that uses the differential signals of electronic transducers is proposed to implement accurate fault location and high speed distance protection on the basis of ensuring the reliability. The impact of fault resistance is analyzed and it is proved that the improved R-L model algorithm is less affected. The simulation experiment, physical experiment and the dynamic characteristics of the algorithm verify the feasibility and effectiveness of the new method.
[1] 王宝诚, 王德玉, 邬伟扬. 罗氏线圈的频率特性分析与传感器的设计方法[J]. 电工技术学报, 2009, 24(9): 21-27. Wang Baocheng, Wang Deyu, Wu Weiyang. Frequency response analysis of a Rogowski coil transducer and its design method[J]. Transactions of China Electrotech- nical Society, 2009, 24(9): 21-27. [2] 李维波, 毛承雄, 余岳辉, 等. 罗氏线圈在高速大功率电流检测系统中的特性研究[J]. 电工技术学报, 2006, 21(6): 49-53. Li Weibo, Mao Chengxiong, Yu Yuehui, et al. Study of property of Rogowski coil applied for measuring the switching current of RSD device[J]. Transactions of China Electrotechnical Society, 2006, 21(6): 49-53. [3] 王红星, 张国庆, 蔡兴国, 等. 电容分压型电子式电压互感器研究与设计[J]. 电力自动化设备, 2009, 29(10): 83-87. Wang Hongxing, Zhang Guoqing, Cai Xingguo, et al. Electronic capacitive voltage transformer[J]. Electric Power Automation Equipment, 2009, 29(10): 83-87. [4] 李延冰. 电子式互感器原理、技术及应用[M]. 北京: 科学出版社, 2009. [5] 索南加乐, 齐军, 陈福锋, 等. 基于R-L模型参数辨识的输电线路准确故障测距算法[J]. 中国电机工程学报, 2004, 24(12): 119-125. Suonan Jiale, Qi Jun, Chen Fufeng, et al. An accurate fault location algorithm for transmission lines based on R-L model parameter identification[J]. Proceedings of the CSEE, 2004, 24(12): 119-125. [6] 索南加乐, 刘文涛, 陈勇, 等. 基于R-L模型误差的自适应距离保护[J]. 电力系统自动化, 2006, 30(22): 66-72. Suonan Jiale, Liu Wentao, Chen Yong, et al. Adaptive distance protection based on R-L model error[J]. Automation of Electric Power Systems, 2006, 30(22): 66-72. [7] 李风光. 距离保护躲过渡电阻能力研究[J]. 电力系统保护与控制, 2011, 39(8): 124-127. Li Fengguang. The capacity of distance protection hiding from transition resistance[J]. Power System Protection and Control, 2011, 39(8): 124-127. [8] 柴济民, 郑玉平, 吴通华. 交流1000kV特高压输电线路距离保护特殊问题[J]. 电力系统自动化, 2007, 31(12): 55-60. Chai Jimin, Zheng Yuping, Wu Tonghua. Problems in the distance relay for 1000kV UHV AC transmission lines[J]. Automation of Electric Power Systems, 2007, 31(12): 55-60. [9] 陈明, 张涛. 基于R-L模型算法的距离保护研究与PSCAD仿真[J]. 电力学报, 2010, 25(2): 167-170. Chen Ming, Zhang Tao. Study of distance protection based on R-L model algorithm and its simulation in PSCAD[J]. Journal of Electric Power, 2010, 25(2): 167-170. [10] 哈恒旭, 张保会, 吕志来. 高压输电线路单端测距新原理探讨[J]. 中国电机工程学报, 2003, 23(2): 42-45. Ha Hengxu, Zhang Baohui, Lü Zhilai. A novel principle of single-ended line fault location technique for EHV transmission systems[J]. Proceedings of the CSEE, 2003, 23(2): 42-45. [11] 黄景光, 董兰兰, 吕艳萍. 基于Matlab的计算机距离保护微分方程算法仿真与研究[J]. 继电器, 2006, 34(5): 13-16. Huang Jingguang, Dong Lanlan, Lü Yanping. Simulating and studying differential equation algorithms of the digital computer distance relaying protection based on Matlab[J]. Relay, 2006, 34(5): 13-16. [12] 王宾, 董新洲, 周双喜, 等. 特高压交流输电线路接地阻抗继电器动作特性分析[J]. 电力系统自动化, 2007, 31(17): 45-49. Wang Bin, Dong Xinzhou, Zhou Shuangxi, et al. Analysis of ground impedance relay operation characteristics for UHV AC transmission lines[J]. Automation of Electric Power Systems, 2007, 31(17): 45-49.
2014, Vol. 29 
