摘要
SF6气体绝缘封闭组合开关(GIS)中隔离开关进行分合母线时,产生快速暂态过电压(VFTO),幅值高且上升速率极快,威胁GIS及相邻设备的绝缘。选取某800 kV GIS隔离开关分合母线的试验电路为研究对象,采用电磁暂态程序(EMTP/ATP)进行建模仿真,隔离开关燃弧时采用Mayr电弧模型,分析其对VFTO的影响,得出考虑Mayr电弧模型时操作隔离开关、断路器侧隔离开关及变压器侧隔离开关的电压波形,并与考虑时变电阻模型的VFTO进行对比。对VFTO波形进行离散傅里叶分析,得到过电压频率、幅值的变化特征,研究结果为GIS绝缘设计提供参考。
When the disconnector in SF 6 gas insulated switchgear(GIS)is used to open and close the busbar,a very fast transient overvoltage(VFTO)with high amplitude and extremely fast rise rate is generated,which threats the insulation of GIS and adjacent equipment.The testing circuit of an 800 kV GIS disconnector switching on and off busbar is selected as the research object.The electromagnetic transient program(EMTP/ATP)is used for modeling and simulating,the Mayr arc model is used when the disconnector is ignited,and its influence on VFTO is analyzed.The voltage waveforms of the disconnector,circuit breaker side disconnector and transformer side disconnector considering the Mayr arc model are obtained,compared with the VFTO considering the time-varying resistance model.Discrete Fourier analysis of VFTO waveform is carried out to obtain the variation characteristics of overvoltage frequency and amplitude,and the research results provide a reference for GIS insulation design.
作者
杨帆
高有华
YANG Fan;GAO Youhua(Shenyang University of Technology,Shenyang 110870,China)
出处
《电器与能效管理技术》
2024年第2期28-32,38,共6页
Electrical & Energy Management Technology
