| In recent years, due to the effect of global climate, severe weather appears frequently in our country. Transmission lines have encountered ice-fault many times. What's more, in January 2008, a wide range of severe ice and snow occurred, in the south of China, which caused a major disaster to the Power Grid, and affected the transport, electric power, communication and the people's life. As a result, the research about the ice-coating theory and anti-icing technology is imminent.With the rapid development of UHV Power grid, the safe and stable operation of UHV Power is the key of the coming main Power Grid. This article, from the starting point of the ice-fault of the first 1000kV HUV AC test project, analyses the causes of the fault, and study the ice-coating theory both in China and abroad, and summarizes the various measures of prevention-icing, and provides the reference for the further prevention-icing work. The main work included:(1) The basic theory research about the transmission lines ice-coating. The article introduces the type of transmission lines ice-coating, the mechanism and all the factors of icing, and provides theoretical basis for solving prevention-icing.(2) Through to the studies of the UHV transmission line ice-fault, analyzing the causes of ice coating flashover, finds out the icing regularity.(3) Analysis and study of the characteristics about the insulator ice-fault, find out the solution to prevent icing.(4) The research about transmission lines ice-prevention technology. Combined with ice prevention measures in the Henan Power Grid, according to the characteristics of UHV transmission line insulator, the targeted measures to solve the prevention of ice-coating are put forward. |
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