Title :
PD patterns for LDPE with needle-plane electrode
Author :
Tani, Yuta ; Ichikawa, Kazuhisa ; Kim, Choong-Sik ; Mizutani, T.
Author_Institution :
Dept. of Electr. Eng., Nagoya Univ., Japan
Abstract :
Partial Discharges (PD) cause the degradation of insulating materials and govern the lifetime of high-voltage power apparatus and cables. Therefore, it is important to understand the PD behaviors in the ageing process. In this paper, partial discharges of low-density polyethylene (LDPE) specimens with needle-plane electrode system were investigated. One specimen had a small air gap between the needle electrode and LDPE, and the other had no air gap between them. The change in PD φ-q-n pattern with ageing time was quite different between LDPE specimens with and without a small air gap. These results were also compared with the result for LDPE specimens with a small void. Based on the above experimental results, the mechanisms of PD degradation and the applications to insulation diagnosis were discussed
Keywords :
ageing; air gaps; partial discharges; polyethylene insulation; voids (solid); ageing process; air gap; high-voltage power apparatus; insulating material; insulation diagnosis; low-density polyethylene; needle-plane electrode; partial discharge pattern; void; Aging; Degradation; Electrodes; Insulation; Needles; Optical filters; Partial discharges; Polyethylene; Resistors; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2001 Annual Report. Conference on
Conference_Location :
Kitchener, Ont.
Print_ISBN :
0-7803-7053-8
DOI :
10.1109/CEIDP.2001.963553
