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Gas insulated switchgear (GIS) has been widely used in electric power system for its high reliability and the small size. And considering the transportation difficulty GIS is always assembled in field. The AC withstand voltage testing is used on the spot to check the insulation condition of GIS, but it is not enough to inspect all the defects inside GIS. So impulse voltage testing is required. But...
Partial discharge characteristics of corona discharge in transformer oil under the oscillating switching impulse voltage is investigated in this paper. A oscillating switching impulse voltage generator has been set up to produce the oscillating switching impulse voltages which satisfy the requirements of IEC60060-3 standard, furthermore the generator can produce positive or negative oscillating switching...
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