ボイド含有ポリエステルフィルムの交流部分放電特性に及ぼすインパルス前課電の影響

抄録

This paper presents the effect of impulse voltage prestress on AC partial discharge characteristics of laminated PET films including an artificial void. The results of AC partial discharge (PD) tests shows that PD inception voltage (PDIV) largely drops after the impulse prestress irrespective of the void diameter and gap length, and later recovers to the first PDIV measured before the prestress. An attempt is made to estimate quantitatively the charge density accumulated on the void surface after the impulse voltage application causing PD from a difference in PDIV before and after the prestress. The observed effect of the prestress on the decrease and recovery of PDIV is discussed in terms of the accumulated surface charge behavior.