基于MATLAB的10kV配电网单相接地故障建模研究

Modular Modeling of Single-Phase Grounding Fault in 10 kV Distribution Network Based on MATLAB

针对目前10 kV非有效接地配电网系统拓扑参数各异、故障特征多样,使得现阶段仿真研究缺乏通用建模方法的问题。以涵盖配电网系统和故障两部分的模块化建模理论分析为基础,总结了一套适用于10 kV配电网单相接地故障的建模方法。基于该建模方法,使用MATLAB平台,搭建了一套涵盖配电网系统一次设备、电流互感器、出线以及故障在内多部分模块的仿真模型系统。同时,利用该系统针对某真实变电站进行了仿真计算,对仿真与实测结果规律的验证和分析结果表明两者的基本规律具有一致性。

The author aims at the problem that the 10 kV non-effectively grounded distribution network system has different topology parameters and various fault characteristics,which makes the current simulation research lack of general modeling methods.Based on the theoretical analysis of modular modeling covering distribution network system and fault,a set of modeling methods suitable for single-phase-to-ground fault in 10 kV distribution network is summarized.And with the help of MATLAB platform,a simulation model system covering multiple parts of the distribution network system including primary equipment,current transformer,outgoing lines and faults is built.At the same time,the simulation calculation is carried out for a real substation by using the system,and the verification and analysis results of the simulation and the measured results show that the basic laws of the two are consistent.