小电流接地系统暂态特征仿真分析  

Simulation Analysis of Transient Characteristics of Small Current Grounding System

作　　者：吴君[1,2] 谢逸飞 张长森[2] WU Jun;XIE Yi-fei;ZHANG Chang-sen(Faculty of Computer Science&Technology,Henan Polytechnic University;Faculty of Physics and Electronic Information,Henan Polytechnic University;Faculty of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]河南理工大学计算机科学与技术学院 [2]河南理工大学物电学院 [3]河南理工大学电气工程与自动化学院,河南焦作454000

出　　处：《软件导刊》2021年第10期124-129,共6页Software Guide

基　　金：河南省基础与前沿技术研究计划项目(142300410148);河南省高等学校重点科研项目(18A470013)。

摘　　要：我国中低压配电网中广泛使用供电可靠性较高的小电流接地系统,但该运行方式下发生单相接地故障的概率较高,可占总故障的80%,且故障暂态特征量周期较短、不易提取,造成选线困难。在分析小电流接地故障暂态过程的基础上,利用MATLAB软件对系统进行建模仿真,采用Simulink中的FFT变换分析不同故障情况下的暂态零序电流及其幅频特征。实验结果为暂态选线方法的研究与发展提供了参考依据。Small current grounding system is widely used in medium and low voltage distribution network in China because of high power supply reliability.However,single-phase grounding fault can account for 80%of all fault types under this operation mode,and the period of transient fault characteristics is short and difficult to extract,resulting in the problem of line selection.Based on the analysis of the transient process of small current grounding fault,MATLAB software is used to model and simulate the system,and FFT transform in Simulink is used to analyze the transient zero sequence current and its amplitude frequency characteristics under different fault conditions,which provides references for the research and development of transient line selection methods.

关 键 词：小电流接地系统 单相接地故障 MATLAB仿真 暂态零序电流 FFT 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]