NDLI: Analysis of electrical tree propagation in XLPE power cable insulation

Content Provider	IEEE Xplore Digital Library
Author	Bao, Minghui Yin, Xiaogen He, Junjia
Copyright Year	2010
Description	Author affiliation: College of Electrical & Electronics Engineering, Huazhong University of Science & Technology, Wuhan, China (Bao, Minghui; Yin, Xiaogen; He, Junjia)
Abstract	Electrical treeing is one of the major breakdown mechanisms for solid dielectrics subjected to high electrical stress. In this paper, the characteristics of electrical tree growth in XLPE samples have been investigated. XLPE samples are obtained from a commercial XLPE power cable, in which electrical trees have been grown from pin to plane in the frequency range of 4000–10000Hz, voltage range of 4–10kV, and the distances between electrodes of 1mm and 2mm. Images of trees and their growing processes were taken by a CCD camera. The fractal dimensions of electric trees were obtained by using a simple box-counting technique. The results show that the tree growth rate and fractal dimension was bigger when the frequency or voltage was higher, or the distance between electrodes was smaller. Contrary to our expectation, it has been found that when the distance between electrodes changed from 1mm to 2mm, the required voltage of the similar electrical trees decreased only 1 or 2kV. In order to evaluate the difficulties of electrical tree propagation in different conditions, a simple energy threshold analysis method has been proposed. The threshold energy, which presents the minimum energy that a charge carrier in the well at the top of the tree should have to make the tree grown, has been computed considering the length of electrical tree, the fractal dimension, and the growth time. The computed results indicate that when one of the three parameters of voltage, frequency and local electric field increase, the trends of energy threshold can be split into 3 regions.
Starting Page	1
Ending Page	4
File Size	689017
Page Count	4
File Format	PDF
ISBN	9781424479450
e-ISBN	9781424479443
e-ISBN	9781424479436
DOI	10.1109/ICSD.2010.5568196
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-07-04
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrodes Electric fields Fractals Physics Mathematical model Dielectrics Computational modeling power cable insulation electrical treeing cross linked polyethylene(XLPE)
Content Type	Text
Resource Type	Article

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