摘要
随着组合式封闭电器(Gas Insulated Switchgear)的广泛应用,快速暂态过电压(Very Fast Transient Overvoltage)对设备造成的危害得到普遍关注。本文针对某550kV GIS系统,利用EMTP计算了不同的开关操作方式对VFTO的影响,计算结果表明分闸操作比合闸操作的过电压情况更严重,且各方式下VFTO幅值基本在操作开关附近最大。另外,主变上的过电压值较小,不超过1.3p.u,对主绝缘影响不大,但因累积效应,危害也很大。
With the widely application of Gas Insulated Switchgear(GIS),the Very Fast Transient Over-voltage(VFTO) from it may be harmful to the equipment which has been attracted people’s attention already.In this paper,the influence of the different way of switching operation to the VFTO is calculated by the electromagnetic transient program(EMTP),taking the 550kV GIS system for example.The results show that the over-voltage of the sub-switch operation is more serious than closing operation,and all VFTO amplitude is max when the switch is operating.The over-voltage of the main transformer is small,no more than 1.3pu.So it is a little effect on the main insulation,but the cumulative effect is harmful.
出处
《电气技术》
2010年第10期21-23,34,共4页
Electrical Engineering
关键词
组合式封闭电器
快速暂态过电压
仿真研究
gas Iinsulated switchgear(GIS)
very fast transient over-voltage(VFTO)
simulation research
