Optimization on room height of 220 kV GIS distribution equipment considering double-break bus disconnector

With the maturity of production technology and the improvement of manufacturing process, on the one hand, combined electrical appliances continue to develop towards integration and miniaturization; On the other hand, without considering the requirement of non-power outage expansion in the long-term expansion of substation, the combinator configured with double-break busbar isolation switch has been more widely used in the power grid. In order to further improve the space utilization rate of substation and reduce the investment and construction cost of substation, the control of the building height is an effective means. Based on the investigation of the dimensions, installation, expansion, testing, operation and maintenance of the combined electrical equipment, this paper puts forward the optimization scheme of the height of 220 kV GIS (Gas Insulation Switch) distribution unit room. Combined with the actual project of certain 500kV substation, the optimization scheme of 220 kV GIS distribution unit room is applied.