252kV GIS中特快速瞬态过电压和特快速瞬态电流特性试验研究

发布时间：2018-04-22 17:08

本文选题：气体绝缘组合电器 + 特快速瞬态过电压　；参考：《电网技术》2015年07期

【摘要】：为深入研究特快速瞬态过电压(very fast transient overvoltage,VFTO)和特快速瞬态电流(very fast transient current,VFTC)的波形特性,以及隔离开关运动速度对二者幅值的影响,采用一套可调节开关运动速度的252 k V气体绝缘组合电器(gas insulated switchgear,GIS)试验回路,对隔离开关分合闸操作中产生的特快速瞬态波形进行了试验研究。获得了VFTO、VFTC的单次击穿波形特征、单次击穿统计特性、波形的频率成分、全过程波形特征、全过程统计特性和残余电压统计特性。分析了开关运动速度对VFTO、VFTC幅值的影响,结果表明,随着开关速度的提高,击穿次数会降低,从而降低出现大幅值VFTO、VFTC的几率。
[Abstract]:In order to study the waveform characteristics of very fast transient overvoltage fast transient over voltage VFTO and very fast transient current very fast transient current VFTC, and the effect of the speed of isolating switch on their amplitudes, In this paper, a 252kV gas insulated switchgear test loop with adjustable switching speed is used to study the very fast transient waveform generated during the switching operation of the disconnector. The characteristics of single breakdown waveform, single breakdown statistical characteristic, frequency component of waveform, whole process waveform, whole process statistical characteristic and residual voltage statistical characteristic of VFTO / VFTC are obtained. The effect of switching speed on the amplitude of VFTO / VFTC is analyzed. The results show that with the increase of switching speed, the breakdown times will decrease and the probability of large VFTO / VFTC will be reduced.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);菏泽供电公司;中国电力科学研究院;
【分类号】：TM86

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