10kV系统架空线及电缆接地故障建模分析  

Modeling and analysis of overhead line and cable grounding faults in 10kV system

作　　者：张菌洁 时亚琳 吴洪伟 李玮欢 Zhang Hanjie;Shi Yalin;Wu Hongwei;Li Weihuan

机构地区：[1]河北盈佳电气设备有限公司,河北石家庄051430 [2]河北工程技术学院,河北石家庄050091

出　　处：《智慧工厂》2024年第5期62-66,共5页Smart Factory

摘　　要：针对架空线路和电缆线路在接地故障中难以准确判故障相、故障位置和故障时刻的线路电压、电流变化情况,首先分析架空线路和电缆线路相关参数,结合实际线路结构,建立等值电路模型,最后通过Simulink对10kV系统配电网输出馈线进行建模,实现对中性点不接地系统的架空线和电缆发生单相接地故障仿真。通过仿真分析验证模型能够实现不同故障相、故障点、接地时刻的接地模拟试验,并能分析在不同接地点电压、电流的变化,帮助应用人员形象直观地理解系统的运行特性。In view of the difficulty in accurately judging the fault phase,fault location and the moment current and voltage of the overhead lines and cable lines in the grounding fault,Firstly,the relevant parameters of overhead lines and cable lines are analyzed,and the equivalent circuit model is established in combination with the actual line structure,finally the output feeder of the 10kV system distribution network is modeled and implemented through Simulink,the model realizes the simulation of single-phase ground faults on overhead lines and cables of neutral ungrounded systems.Through simulation analysis,the verification model can realize the grounding simulation test of different fault phases,fault points and grounding moments.The model could analyze the changes of voltage and current at different grounding points,and help application personnel intuitively understand the operating characteristics of the system.

关 键 词：SIMULINK 架空线 电缆 单相接地故障 建模 

分 类 号：TM73[电气工程—电力系统及自动化]