Title :
Characteristics of PD pulse sequence and single-pulse light emission in artificially-simulated tree channel
Author :
Kaneiwa, H. ; Suzuoki, Y. ; Mizutani, Tomoko
Author_Institution :
Nagoya Univ., Japan
Abstract :
In order to clarify the mechanisms of partial discharge (PD) and tree degradation in an electrical tree, PD´s in an artificially-simulated tree channel connected to a pin-electrode in LDPE were investigated. This paper discusses the characteristics of PD´s which take place when a tree propagates from the tip of artificial channel by utilizing PD pulse sequence and single-pulse light emission. The PD pulse sequence showed that large and small PD´s took place in a half cycle. The magnitude of positive PD pulses changed regularly in a half cycle. Each positive PD pulse took place when the applied voltage increased by a constant value. There was no correlation between the voltage increment and the PD magnitude. The conventional simple PD model can not explain these results. The light emission from a single PD pulse was observed near the tip of pin-electrode in the artificial channel in spite of the tree propagation
Keywords :
polyethylene insulation; trees (electrical); LDPE; artificially-simulated tree channel; electrical tree; low density polyethylene; partial discharge; pin-electrode; pulse sequence; single-pulse light emission; tree degradation; Degradation; Electrodes; Optical propagation; Partial discharges; Pulse measurements; Shape; Trees - insulation; Tungsten; Voltage; Wire;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1999 Annual Report Conference on
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-5414-1
DOI :
10.1109/CEIDP.1999.807877
