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Estimation of the degree of aging and the remaining lifetime of composite insulators is an important issue. In this paper, one shed of a 500 kV AC composite insulator that has operated for three years on a transmission line was studied. The insulator shed was cut longitudinally into four layers from the upper surface to the bottom surface and tested by the thermally stimulated current (TSC) method,...
As composite insulators have been widely used in power system, the aging of composite insulator has become a threat to safe operation of transmission line. In order to investigate the influence of several aging factors on the sheds of high temperature vulcanized silicone rubber composite insulator, nine pieces of energized sheds on the high voltage end serviced on 500kV transmission lines have been...
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