1000kV GIS中燃弧电阻模型对快速瞬态过电压的影响  

Influence of arc resistance model on very fast transient overvoltage in 1 000kV gas insulated switchgears

作　　者：张铭洋 高有华[1] 李茜 杨帆[1] 闫茂伟 ZHANG Mingyang;GAO Youhua;LI Qian;YANG Fan;YAN Maowei(School of Electrical Engineering,Shenyang University of Technology,Shenyang 110870)

机构地区：[1]沈阳工业大学电气工程学院,沈阳110870

出　　处：《电气技术》2023年第12期7-13,共7页Electrical Engineering

基　　金：辽宁省科技重大专项(2020JH1/10100012)。

摘　　要：气体绝缘金属封闭开关设备(GIS)中隔离开关因开断性能差在动作时会产生上升时间极短的快速瞬态过电压(VFTO),VFTO上升时间短、幅值高的特性会对电气设备绝缘造成严重危害。本文利用仿真研究定值燃弧电阻模型、指数燃弧电阻模型、双曲线燃弧电阻模型、Mayr燃弧电阻模型和重燃弧电阻模型,得到各燃弧模型下VFTO的幅值和频谱图,并分析各燃弧模型下VFTO波形的衰减、振荡与上升时间。通过对比各模型仿真结果得出,重燃弧电阻模型更符合实际电弧模型,利用该模型得到的VFTO幅值、振荡与上升时间能更好地描述其波形。The isolating switch in the gas insulated switchgear(GIS)generates a very fast transient overvoltage(VFTO)within a very short rise time when operating due to poor breaking performance.VFTO has the characteristics of short rise time and high amplitude,which cause serious harm to the insulation of electrical equipment.This paper studies the fixed arc resistance model,exponential arc resistance model,hyperbolic arc resistance model,Mayr arc electron model and reigniting arc resistance model by simulation,and obtains the amplitude and spectrum diagram of VFTO under each arc model.Meanwhile,the attenuation,oscillation and rise time of VFTO under each arc model are analyzed.It is concluded that the reigniting arc resistance model is more suitable for VFTO simulation.

关 键 词：快速瞬态过电压(VFTO) 电弧模型 电磁暂态程序(EMTP) Mayr模型 指数电阻 双曲电阻 

分 类 号：TM595[电气工程—电器]