Repeated Strike Process Modeling of Very Fast Transient Overvoltage Induced by Disconnector Switch Operation in 252kV GIS

被引：0
|
作者：
Zhao, Lin [1 ]
Ye, Liya [2 ]
Wang, Shaoan [1 ]
Zhan, Huamao [3 ]
Yang, Yong [1 ]
Jiang, Peng [1 ]
机构：
[1] State Grid Zhejiang Elect Power Res Inst, Hangzhou, Zhejiang, Peoples R China
[2] State Grid Zhejiang Training Ctr, Hangzhou, Zhejiang, Peoples R China
[3] North China Elect Power Univ, Beijing, Peoples R China
来源：
2018 3RD IEEE INTERNATIONAL CONFERENCE ON INTEGRATED CIRCUITS AND MICROSYSTEMS (ICICM) | 2018年
关键词：
disconnector; very fast transient overvoltage; strike characteristics; arc resistance model; variable step;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
It is a problem that the existing very fast transient overvoltage (VFTO) repeated strike simulation model doesn't take strike characteristics of the contact gap into account and the arc resistance model can not fully reflect the dynamic changes of the arc. Firstly, a 252 kV GIS experiment platform is established to obtain strike characteristics by closing/opening disconnector. Secondly, considering peak value of current, length of contact gap and air pressure, combined with the arc extinction law of special fast transient overcurrent (VFTC), a double exponential high frequency arc resistance model is proposed. Finally, based on the discharge voltage curve and arc resistance model, the whole-process VFTO simulation model of 252kV GIS is established. Variable step method is used to alternate calculations of the power-frequency steady process and high-frequency transient process to obtain an efficient and accurate simulation.
引用
收藏
页码：109 / 113
页数：5
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