摘要随着我国电力工业的高速进展和电压等级的不断提高,气体绝缘变电站(GIS)在我国电力系统中的应用越来越广泛。气体绝缘变电站的特快速暂态过程对运行安全可靠性的影响也得到了越来越高的重视,尤其是GIS 在我国特高压电网中的应用前景使其受关注不断提高。近年来 GIS隔离开关操作引起的快速暂态问题更加突出,主要是以 GIS 中陡波前过电压(VFTO)对设备本身与相邻设备的影响,因此通过 VFTO 的计算以指导超、特高压 GIS 绝缘设计。 首先介绍了 GIS 产生的机理与其结构和特性,其次是关于电磁暂态程序(EMTP)的学习,最后是对 VFTO 的计算。以 550KV GIS 为例,首先,计算模型与其等效参数的确定,根据现有文献资料确定主线路和 GIS 部元件的计算模型和具体的等效参数。其次,确定 GIS 的操作方式,根据有关的论文资料以与电站的电气接线特点确定 GIS 的具体操作方式。最后,针对每一种操作方式,计算由隔离开关操作引起的 VFTO 值。 通过分析对不同运行工况下 GIS 部各节点的快速暂态过电压,从而确定 VFTO 是否会对设备本身以与相邻设备造成危害,以此来指导 GIS 的绝缘设计。关键词:GIS;VFTO;EMTP;计算模型AbstractWiththe high speed development of our country electric power industry and the increasing of voltage grade, gas insulated substation (GIS) applications in power system in our country is more and more widely. Fast transient process of gas insulated substation's influence on the running safety and reliability also got more and more attention, especially the application foreground of GIS in uhv power grid in our country so that it is increasing attention. In recent years GIS disconnector operation caused by the rapid transient problem become more prominent, mainly steep wave front overvoltage (VFTO) in GIS's influence on the equipment itself and the adjacent equipment, therefore the VFTO through the calculation to guide, uhv GIS insulation design.First introduces the formation mechanism of GIS and its structure and features, the second is about the study of electromagnet...