高电压技术2016，Vol.42Issue(3)：936-941,6.DOI:10.13336/j.1003-6520.hve.20160308028
冲击电压波形参数对SF6稍不均匀电场棒-板间隙放电电压的影响
Influence of Impulse Waveform Parameters on Breakdown Voltage in SF6 Quasi-uniform Electric Field of Rod-plate Gap
文韬 1张乔根 1马径坦 1秦逸帆 1殷禹 2时卫东2
作者信息
- 1. 西安交通大学电力设备电气绝缘国家重点实验室,西安710049
- 2. 中国电力科学研究院,北京100192
- 折叠
摘要
Abstract
Very fast transient overvoltages(VFTOs) generated during the routine operations of disconnector switch in gas-insulated metal-enclosed switchgear(GIS) greatly threaten the insulation of power equipment such as GIS.So far, the research results of the insulation characteristics of GIS under VFTO are dispersive and poorly comparable due to the non-standardized waveform parameters of VFTO.Using the steep fronted impulse generator, we studied the influences of impulse waveform parameters on the breakdown voltage in SF6 quasi-uniform electric field.The results show that, with the rise of gas pressure, the 50％ breakdown voltages increase with an approximate linear trend under impulses with different waveform parameters.The gas gap discharge has the reversal phenomenon of polarity effect, and the critical pressure of polarity reversion is connected with the impulses' waveform parameters.Meanwhile, the 50％ breakdown voltages do not change significantly with the increase of impulse wave fronts and the 50％ breakdown voltage-wave front time curves tend to be U-shaped.The 50％ breakdown voltages decrease slightly with the increase of impulse wave tails.Considering the fundamental characteristics of VFTO waveforrns and the special needs for the high capacity load in field test, the double-exponential impulses with wave front time of 0.2～0.8 μs and wave tail time of 1.2～15 μs are chosen as the simulated waveforms for VFTO to further study the field VFTO testing standard waveforms.关键词
冲击电压/波前时间/波尾时间/SF6棒-板间隙/50％放电电压/极性效应/空间电荷/放电时延Key words
impulse voltage/wave front time/wave tail time/SF6 rod-plate gap/50％ breakdown voltage/polarity effect/space charge/discharge time log引用本文复制引用
文韬,张乔根,马径坦,秦逸帆,殷禹,时卫东..冲击电压波形参数对SF6稍不均匀电场棒-板间隙放电电压的影响[J].高电压技术,2016,42(3):936-941,6.
