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In order to meet the requirement of mechanical properties, multiple parallel suspension insulators will be used in UHV lines. In this paper, pollution flashover performance of multiple parallel insulators has been investigated based on artificial contamination tests under both AC and DC voltage. Four types of multiple parallel suspension mode are used in the tests, which has 2 strings, 3 strings,...
On the background of the peculiar technology problems with the external insulation of UHV dc equipment in China, caused by high altitude and heavy pollution, this paper presents the pollution flashover performance of full-scale ??800 kV converter station post insulators at actual high altitude area. The tests were carried out according to the solid layer method, and the 50% withstand voltage (U50%...
The PRTV coating materials had perfect performance in antipollution flashover for porcelain and glass insulators because of the surface hydrophobicity. Usually, the whole strings of insulators were coated with PRTV coatings in engineering application. In order to reduce the consumption of materials, a way of incomplete spraying PRTV coatings was mentioned in this paper. And the pollution flashover...
In order to study how the factors (NSDD, distribution of nastiness, components of salt, etc) influenced the flashover characteristics of insulators, the artificial contamination tests were carried out for composite insulators in the conditions of different nonsoluble deposit density (NSDD) and different distribution of nastiness and different components of salt in the area of high-altitude Kunming...
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