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Oil-paper insulation, as a major insulation mode used in power transformers, is continuously and unavoidably subjected to repeated lightning impulses, which may bring potential risk to the insulation system. Therefore, in this work, accumulative effect of repeated lightning impulses and its damage mechanism in oil-impregnated paper (OIP) are investigated. Firstly a repetitive impulse accumulating...
Insulation system of power transformers endures power frequency alternating voltage as well as switching impulse voltage and lightning impulse voltage, which may bring potential risk to the insulation system. Therefore, it is of great necessity and importance to study the influence of lightning impulse on the oil-paper insulation system. In this paper, the accumulative effect of multiple negative...
Detection efficiency mid Detection precision for 2 LLS in Guangdong province, China is analyzed comprehensively based on Ihe he close Optical-Electrical observation of Rocket-triggered lightning. The results show that the normalized space location error of ground-triggered strokes was 760 meters, 2790 meters for LLS2, lightning current amplitude are normalized to be 14% for LLS1 and 31% for LLS2.This...
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