Research and Development of 800kV High-voltage AC Disconnector

The disconnector is a circuit switching equipment used in no load condition.In 2005,China took the lead in the Northwest power grid construction,the first 750 kV line and substation installation height of about 2 000 m above sea level.Therefore,the development for high altitude areas of the 800 kV high-voltage AC disconnector is an important topic in high-voltage power field,have a significant role in engineering applications.This article based on reviews of the foreign 800 kV UHV disconnector development,and through the discussion and research of 800 kV high-voltage disconnector insulation distance calculation,grading ring design and some technical parameters,some preliminary conclusion are drawn.According to the environmental characteristics of the northwest area in China,study line statistical withstand voltage calculations to determine the high altitude of 800 kV high-voltage AC disconnector insulation parameters and to develop 800 kV high-voltage AC disconnector of structural parameters for the development of 800 kV high-voltage AC disconnect switch provides the technical support.