Title :
The physical model for PD in tree channel and its effects on tree growth
Author :
Wu, K. ; Suzuoki, Y. ; Mizutani, T. ; Xie, H.K.
Author_Institution :
Dept. of Electr. Eng., Nagoya Univ., Japan
Abstract :
A mathematical model for PD propagation in a single channel is put forward to illustrate the behavior of PD in tree growth. In a long channel, PD is induced by the high field near the needle tip, then propagates along the channel by field enhancement due to injected charge by PD, and stops propagating when the field becomes less than a certain value due to field divergence. By considering that tree growth is closely related to the probability distribution for PD propagation, various characteristic of tree growth can be explained in term of gas pressure and charge injection. This model also explains the fractal nature of treeing breakdown
Keywords :
fractals; partial discharges; trees (electrical); PD propagation; breakdown; charge injection; fractal; gas pressure; model; needle-plane electrode; tree channel; tree growth; Conductors; Degradation; Electric breakdown; Electrodes; Electrons; Erbium; Needles; Partial discharges; Probability distribution; Voltage;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1997., Proceedings of the 5th International Conference on
Conference_Location :
Seoul
Print_ISBN :
0-7803-2651-2
DOI :
10.1109/ICPADM.1997.617628
