DC pollution flashover and rain performance for composite post insulators at high altitudes

DC pollution flashover and rain flashover performance for composite post insulators at high altitudes

The DC flashover performance of 4 types of composite post insulator and 2 types of ceramic post insulator under different ESDD, NSDD, insulator material and shapes were studied.

The development of post composite insulators is one of the ways to solve the problems of high altitude and heavy pollution involved in ±800 kV UHVDC transmission projects.

In this paper,the mechanism and factors of electrolytic corrosion is studied when support insulators are used in HVDC.

Verifying the bending resistance of support insulator is one of the key points in the design of switch gear for support type busbar, and it is also an importance factor on which the selection of equipment should be based This article made an analysis of the horizontal loading of support insulator and gave an actual example of verifying the bending resistance of support insulato

This paper introduces the application of ultrasonic flaw detecting technology for support insulator.

Research on external electric field distribution of post insulator;

The failures analysis of post insulator and porcelain bushing and study of ultrasonic testing technique;

Profiles of HVDC post insulator and bushing used in converter station was researched from three aspects including pollution accumulation,artificial pollution test and artificial rain flashover test.

In spring haze day,the supporting insulator of 500 kV step-up substation in CLP Guangxi Fangchenggang Power Co.