配网电缆中性点小电阻接地故障及选线研究  

Study on the Neutral Point Low Resistance Grounding Mode and Fault Line Selection for Distribution Network Cable

作　　者：雷健新 张浩[1] 彭道刚[1] 

机构地区：[1]上海电力学院自动化工程学院,上海200090

出　　处：《自动化仪表》2016年第9期48-51,共4页Process Automation Instrumentation

基　　金：上海市高新技术领域基金资助项目(编号:15111106800);上海市社会发展领域基金资助项目(编号:16DZ1202500)

摘　　要：为确保电网的安全运行,对配网电缆接地故障特征及选线方法进行研究。首先对中性点小电阻接地模式进行理论分析,利用Matlab/Simulink软件平台,建立电缆故障仿真模型。针对性地研究了单相接地和两相接地短路故障的特性以及不同故障因素对故障特征的影响。结合电缆故障选线系统存在的不足,提出了一种基于零序电流的群体比幅比相法。仿真结果验证了该方法的可行性与有效性。In order to ensure the safe operation of pouler grid,fault features and the method of fault line selection for distribution network cable are studied, firstly, the low resistance grounding mode of neutral point is selected for researching, then the MATLAB/Simulink software platform is adopted to build the fault simulation model, and the short cut fault features of single phase grounding and two phase grounding, and the influence of different fault factor are studied pertinently. In addition, considering the deficiency of fault line selection, the method of group amplitude comparison and phase comparison based on zero sequence current is proposed. The result of simulation verifies the feasibility and effectiveness of this method.

关 键 词：电缆故障 小电阻接地 MATLAB/SIMULINK 零序电流 群体比幅比相法 故障选线 

分 类 号：TH89[机械工程—仪器科学与技术] TP27[机械工程—精密仪器及机械]