基于PSCAD的220 kV线路开关雷击故障的电磁暂态分析  

Electromagnetic Transient Analysis of Lightning Failure of the 220 kV Line Switch Based on PSCAD

作　　者：许彬 

机构地区：[1]国网福建电力有限公司检修分公司,福州350000

出　　处：《高压电器》2017年第5期116-120,126,共6页High Voltage Apparatus

摘　　要：随着电网调控的迅速发展,电网运行状态将不断发生变化,变电站内的进线开关出现暂时分闸的情况亦将愈加频繁,为了防止雷电在站内热备用开关上产生全反射导致开关设备损坏,甚至发生跳闸事故,文中以一起线路遭受雷电入侵波后造成220 kV变电站出现开关断口爆炸事故为实例进行分析,并通过采用PSCAD电磁暂态分析软件对雷电侵入波对站内开关产生影响进行暂态仿真分析,并进一步分析了采用出线侧避雷器后的防雷效果。分析表明,对于雷击多发的变电站,应在每回进线断路器出线端或出线第一基杆塔(建议接地电阻阻值7Ω)处装设MOA避雷器,可以显著提高变电站雷电入侵效果,对于已安装线路避雷器变电站,需加强对线路避雷器的巡视及维护工作,防止避雷器年久老化而失去保护作用,从而确保变电站内相关设备的正常安全运行。line switch equipment With the rapid development of the power grid control, power running state will continue to change, the substation appear temporary opening of the case will more frequently, in order to prevent the switch damage which caused by lightning total reflection in hot standby switch station, even the trip accident. In this paper,an explosion accident of 220 kV substation switching breaker which caused by lightning invasion wave is analyzed as an example, and through using the electromagnetic transient analysis software PSCAD, the im- pact of lightning invasion wave on the switch in stations is analyzed, and further analysis of the effect of the use of the outlet side of the lightning arresters is carried out. This paper analyzes show that,for substation lightning strike- prone, should the outlet end or outlet tower at first base every time the line breaker （recommended grounding resistor 7 Ω）installed at MOA arrester, can significantly improve the substation lightning invasion effect, for already installation line arrester substation, the line should be strengthened inspections and maintenance work arrester to prevent lightning in a long time and lose the protective effect of aging,so as to ensure the normal operation of the equipment in the substation.

关 键 词：雷电侵入波 全反射 PSCAD MOA避雷器 

分 类 号：TM63[电气工程—电力系统及自动化] TM863