摘要
通过对西北750 kV输变电示范工程及其后续工程中高海拔问题的介绍,分别从海拔修正的选取、设备外绝缘水平的确定、套管和瓷套的参数选择、在高海拔地区设备的试验和运行考验等方面对目前750 kV运行和在建项目中关于高海拔问题所采取的技术措施进行了探讨和分析。可为国内外同行在高海拔地区超高压输变电工程建设中选择外绝缘参数等方面提供借鉴。
Based on the 750 kV transmission and substation demonstration project and the follow-ups in Northwest grid, the problems of substation equipment in high altitude areas are explored. It introduces the technical measures in high altitude areas, by which the 750 kV projects in China is being built and operated, concerning the selection of altitude correction factors, the calculation of external insulation parameter of electrical equipment, the selection of the parameters of the bush, site test in high altitude areas and the electrical equipment operation. It can provide reference for selecting the external insulation parameters in constructing extra-high voltage transmission and substation projects in high altitude areas in China and other countries.
关键词
750
kV
高海拔
外绝缘
变电设备
750 kV
high altitude
external insulation
electrical equipment in substation
