Partial Discharges Under Impulse-Voltage Conditions

Abstract

Throughout this chapter, the following symbols will be used.

PD distribution in aged oil impregnated insulation using non sinusoidal voltage supply

“…With an appropriate filtering technique, a measuring sensitivity of up to 3pC could be achieved. It has been justified that the main discharges occur during the short period of application of the front impulse voltage, followed by small discharges with reversed polarity [1].…”

“…In addition, the earlier investigations mainly explored solid insulating materials [1,2,[5][6][7] and there were only a few studies that observed oil-impregnated insulation [3,8]. Consequently, many studies are still required to investigate the ageing characteristics in oil-impregnated insulation.…”