摘要
随着超高压GIS的广泛使用,由开关操作产生的快速暂态过电压(VFTO)引起普遍关注。以拉西瓦750 kV GIS变电站为原型,利用EMTP计算了主变端部的VFTO,并分析了开关并联电阻、主变与GIS的连接方式、MOA及R-C过电压吸收器等保护措施对变压器的保护效果,为GIS以及变压器的安全运行提供了有用的参考。
With the widely used of gas insulated substation, especially for ultra-high voltage level, very fast transient over-voltage generated by switching operations has caused more and more attention. In this paper a 750 kV GIS system has been set up referring to the Laxiwa substation. VVFO at the transformer terminal of different switching operations have been computated. The protective effects of shunt resistor of CB or DS, MOA, R-C surge suppresser and the connections of transformer to GIS have been studied, which provides useful reference for the safe operation of GIS and transformer.
出处
《高压电器》
EI
CAS
CSCD
北大核心
2007年第2期122-124,共3页
High Voltage Apparatus
