Voltage-Time Characteristics of Partial Discharge Inception in Liquid Nitrogen/Solid Composite Insulation System under Thermal Bubble Condition

摘要

For the practical insulation design of high temperature superconducting power apparatus, it is necessary to elucidate partial discharge (PD) inception characteristics in liquid nitrogen (LN_2). However, most of investigations have been limited to breakdown characteristics in LN_2. Furthermore, the influence of thermal bubbles on PD inception characteristics should also be taken into account. In this paper, we investigated PD inception characteristics in LN_2/solid composite insulation system under practical operating Conditions with thermal bubbles.