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The Conduction Characteristics of Electrical Trees in XLPE Cable Insulation

The Conduction Characteristics of Electrical Trees in XLPE Cable Insulation
The Conduction Characteristics of Electrical Trees in XLPE Cable Insulation
Depending on the morphology of the material and applied voltage frequency, three kinds of electrical trees can exist in cross-linked polyethylene (XLPE) cable insulation, which are conducting, non-conducting, and mixed trees with different growth mechanisms. It is suggested that when the needle is inserted into large spherulites, conducting trees will form in those spherulites; when it is inserted among spherulites, non-conducting trees will appear along the boundaries of spherulites. Frequency will accelerate the growth of non-conducting trees but have little influence on the initiation and growth processes of conducting trees. If the initiation process of non-conducting trees is too difficult, they will grow into mixed trees. Finally, it is concluded that the space charge limited tiny breakdown around the tips of electrical trees is responsible for the propagation process of conducting trees; on the other hand, fast expansion occurs due to local high temperature and pressure along the boundaries, partial discharge in electrical tree paths and charge recombination, etc., which are the main reason for the growth of nonconducting trees.
cross-linked polyethylene cable insulation, electrical trees, conducting characteristic, morphology, frequency
0021-8995
3325-3330
Xie, Ansheng
3b0df7b4-f157-424f-9f06-6e43be1a7a1f
Zheng, Xiaoquan
88349f57-8c82-439e-bdf6-6b59a14309af
Li, Shengtao
e2d199c9-1c0c-40c8-aefb-ff3b3d8e4799
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Xie, Ansheng
3b0df7b4-f157-424f-9f06-6e43be1a7a1f
Zheng, Xiaoquan
88349f57-8c82-439e-bdf6-6b59a14309af
Li, Shengtao
e2d199c9-1c0c-40c8-aefb-ff3b3d8e4799
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819

Xie, Ansheng, Zheng, Xiaoquan, Li, Shengtao and Chen, George (2009) The Conduction Characteristics of Electrical Trees in XLPE Cable Insulation. Journal of Applied Polymer Science, 114, 3325-3330.

Record type: Article

Abstract

Depending on the morphology of the material and applied voltage frequency, three kinds of electrical trees can exist in cross-linked polyethylene (XLPE) cable insulation, which are conducting, non-conducting, and mixed trees with different growth mechanisms. It is suggested that when the needle is inserted into large spherulites, conducting trees will form in those spherulites; when it is inserted among spherulites, non-conducting trees will appear along the boundaries of spherulites. Frequency will accelerate the growth of non-conducting trees but have little influence on the initiation and growth processes of conducting trees. If the initiation process of non-conducting trees is too difficult, they will grow into mixed trees. Finally, it is concluded that the space charge limited tiny breakdown around the tips of electrical trees is responsible for the propagation process of conducting trees; on the other hand, fast expansion occurs due to local high temperature and pressure along the boundaries, partial discharge in electrical tree paths and charge recombination, etc., which are the main reason for the growth of nonconducting trees.

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More information

Published date: 20 August 2009
Keywords: cross-linked polyethylene cable insulation, electrical trees, conducting characteristic, morphology, frequency
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 267791
URI: https://eprints.soton.ac.uk/id/eprint/267791
ISSN: 0021-8995
PURE UUID: 260cb0e5-e828-4a0b-91df-d0900efe7ca0

Catalogue record

Date deposited: 21 Aug 2009 12:16
Last modified: 18 Jul 2017 07:00

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