Based on the layout design of 550 kV GIS in Tingzikou Water Control Project,the installation technologies of closing installation chamber and placing it at a standstill for dust removing are proposed.The application of DILO vacuum pumps and the optimization of installation processes reduce the installation duration.Combining with the structural characteristics of GIS,the step-by-step withstand voltage test and the partial discharge detection after installing voltage transformers and surge arresters are carried out respectively.At present,the commissioning and on-site withstand voltage tests of 550 kV GIS in Tingzikou Project are qualified at the first time,and shows that the installation technologies meet engineering requirements.%结合亭子口水利枢纽550 kV GIS布置设计,提出了采用封闭静置防尘的安装措施;采用DILO真空泵组,优化安装工艺程序,缩短了安装时间;结合GIS的结构特点,进行了分步耐压试验,内装电压互感器、避雷器后电压试验带局部放电检测.目前亭子口水利枢纽550 kV GIS安装调试和现场耐压试验皆一次顺利通过,说明GIS安装技术满足工程要求.
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