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零序暂态电流接地选线原理与方法研究

发表时间:2010-07-31  浏览量:1082  下载量:554
全部作者: 齐敦金,韩智强,王涛
作者单位: 中国矿业大学信电学院
摘 要: 通过小电流接地模拟电网在不同条件下发生单相接地故障时的实录波形分析与处理,深入分析了小电流接地系统发生单相接地故障稳态过程和暂态过程,得到了小电流接地系统发生单相接地故障时暂态特征。鉴于模拟电网的局限性,采用Matlab 7�1/Simulink 6�3软件搭建具有10 kV五出线的仿真电网进行大量单相接地故障仿真实验。最后,提出基于零序暂态电流首半波比值的选线判据,并对该方法进行大量不同条件下的仿真实验,进一步验证该判据的正确性。
关 键 词: 电力系统及其自动化;小电流接地选线;单相接地故障;零序电流;暂态分量;Simulink
Title: Study on earth faulty line selection using transient zero sequence current in non�solidly earthed network
Author: QI Dunjin, HAN Zhiqiang, WANG Tao
Organization: School of Information and Electrical Engineering, China University of Mining and Technology
Abstract: After analyzing a lot of experimental data from the simulation of power network, the features of zero�sequence transient currents in faulty feeder arcing fault and healthy feeders while arcing fault occurs was obtained. The steady�state and transient process was introduced. Due to the limitation of the simulation of power network, a round of five 10 kV feeder for the simulation of a large number of single�phase to ground fault was modeled with Matlab 7�1/Simulink 6�3. A new method of single�phase grounded feeder detection in indirectly earthed power system based on the ratio of the first half�wave of zero�sequence transient current was introduced and a large number of simulation experiments under different conditions to further verify the validity of the method.
Key words: electric power system and its automation; indirectly earthed power system; single�phase earth fault; zero�sequence current; transient state component Simulink
发表期数: 2010年7月第14期
引用格式: 齐敦金,韩智强,王涛. 零序暂态电流接地选线原理与方法研究[J]. 中国科技论文在线精品论文,2010,3(14):1479-1485.
 
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