Change in partial discharge characteristics by tree propagation from an artificial-simulated tree channel

Author

Nishizaka, M. ; Kawabata, H. ; Kim, C.-S. ; Mizutani, T.

Author_Institution

Dept. of Electr. Eng., Nagoya Univ., Japan

Volume

3

fYear

2003

fDate

1-5 June 2003

Firstpage

887

Abstract

In order to clarify the mechanisms of partial discharge (PD) and tree degradation, PD characteristics of an artificially-simulated tree channel in a low-density polyethylene (LDPE) were investigated. PD characteristics of an artificial channel remarkably changed after the inception of very small trees from its tip. This indicates the change in PD mechanism by the tree inception. The PD characteristics of an artificial channel with diameter of 30 μm were similar to those of a tree. On the other hand, an artificial channel with diameter of 100 μm showed PD characteristics similar to a void. PD characteristics strongly depended on channel diameter. From these results, the mechanisms of PD in a tree channel and tree propagation were discussed.

Keywords

partial discharges; polyethylene insulation; trees (electrical); 100 micron; 30 micron; LDPE; PD characteristics; artificial-simulated tree channel; low-density polyethylene; partial discharge; tree propagation; Degradation; Electrodes; Optical microscopy; Optical propagation; Partial discharges; Pulse measurements; Trees - insulation; Tungsten; Voltage; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials, 2003. Proceedings of the 7th International Conference on

ISSN

1081-7735

Print_ISBN

0-7803-7725-7

Type

conf

DOI

10.1109/ICPADM.2003.1218564

Filename

1218564