Present Situation and Prospects of Applying Composite Insulators to UHF Transmission Lines in China

The course of developing composite insulators and its large scale application in China are reviewed,and the statistics of domestic operating experience of composite insulators is given.The main failures which appear during the application of composite insulators,such as brittle fracture of rods,mechanical property,interface breakdown,creepage flashover,ageing performance and so on,are summarized and analyzed.The prospects of applying composite insulators in UHV transmission lines are forecasted.