Dielectric Characteristics of Oil filled Transformer under Non-standard Lightning Surge Waveforms

Dielectric Characteristics of Oil filled Transformer Insulation Models under Fast Front Short Duration Impulse Voltages

Abstract

This paper deals with the breakdown voltage characteristics of oil filled transformer insulation models under fast front short duration impulse voltages(FFSDV). Types of tested insulation models are an oil gap, a turn-to-turn insulation model and a section-to-section insulation model. Breakdown voltages of three kind models have been measured with standard lightning impulse voltages and FFSDV. As the results, the breakdown voltages of three kind models under FFSDV are 1.3_??_1.5 times higher than those under standard lightning impulse voltages.