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Comparison of two models on simulating electric field in HVDC cable insulation

Comparison of two models on simulating electric field in HVDC cable insulation
Comparison of two models on simulating electric field in HVDC cable insulation
Space charge accumulation in cable insulation is one of the major technical problems in the further development of HVDC cables. A conductivity model and a bipolar charge transport model are developed to respectively calculate the space charge and electric field distribution in polymeric insulation. In this paper, both models are employed to simulate the field distribution in a medium voltage polymeric cable. Comparisons are made between theoretical and simulation results. The limitations of the conductivity model which is widely used in HVDC cable design are presented, and the results of the bipolar charge transport model are more consistent with the experimental observations. Moreover, transient current in the cable is simulated to anticipate the field distribution within the insulation when subjected to a thermal transient. The results suggest that the thermal transient can affect the space charge and electric field distribution significantly. A field inversion can only take place with higher temperature and larger temperature gradient, and this can be maintained even with temperature decreasing.
1070-9878
1107-1115
Zhan, Yunpeng
5d162333-4c63-4b95-9a11-87d6b438aea0
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Hao, Miao
fb7006e0-07c0-46f5-9279-e30a7d3bd614
Pu, Lu
10509dbc-38fd-4da9-9ea2-0572f3bce6fa
Zhao, Xuefeng
6baa94dc-0b54-4553-b9a8-39b64c4f5b9f
Sun, Haofei
d67245e2-4acd-4ffa-bcba-5ff9d0d4ae9e
Wang, Sen
003d3e09-ec33-4b78-852a-626e8532f5cb
Guo, Anxiang
d6d53111-0ed7-4af3-97a0-e33c9347e290
Liu, Jian
03c42a59-6f39-4069-a4b0-464958554e96
Zhan, Yunpeng
5d162333-4c63-4b95-9a11-87d6b438aea0
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Hao, Miao
fb7006e0-07c0-46f5-9279-e30a7d3bd614
Pu, Lu
10509dbc-38fd-4da9-9ea2-0572f3bce6fa
Zhao, Xuefeng
6baa94dc-0b54-4553-b9a8-39b64c4f5b9f
Sun, Haofei
d67245e2-4acd-4ffa-bcba-5ff9d0d4ae9e
Wang, Sen
003d3e09-ec33-4b78-852a-626e8532f5cb
Guo, Anxiang
d6d53111-0ed7-4af3-97a0-e33c9347e290
Liu, Jian
03c42a59-6f39-4069-a4b0-464958554e96

Zhan, Yunpeng, Chen, George, Hao, Miao, Pu, Lu, Zhao, Xuefeng, Sun, Haofei, Wang, Sen, Guo, Anxiang and Liu, Jian (2019) Comparison of two models on simulating electric field in HVDC cable insulation. IEEE Transactions on Dielectrics & Electrical Insulation, 26 (4), 1107-1115. (doi:10.1109/TDEI.2019.007878).

Record type: Article

Abstract

Space charge accumulation in cable insulation is one of the major technical problems in the further development of HVDC cables. A conductivity model and a bipolar charge transport model are developed to respectively calculate the space charge and electric field distribution in polymeric insulation. In this paper, both models are employed to simulate the field distribution in a medium voltage polymeric cable. Comparisons are made between theoretical and simulation results. The limitations of the conductivity model which is widely used in HVDC cable design are presented, and the results of the bipolar charge transport model are more consistent with the experimental observations. Moreover, transient current in the cable is simulated to anticipate the field distribution within the insulation when subjected to a thermal transient. The results suggest that the thermal transient can affect the space charge and electric field distribution significantly. A field inversion can only take place with higher temperature and larger temperature gradient, and this can be maintained even with temperature decreasing.

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More information

Accepted/In Press date: 31 January 2019
e-pub ahead of print date: 1 August 2019
Published date: August 2019

Identifiers

Local EPrints ID: 428102
URI: https://eprints.soton.ac.uk/id/eprint/428102
ISSN: 1070-9878
PURE UUID: d3d0eef2-dacb-471b-849d-a4b73d4a0cc4
ORCID for Yunpeng Zhan: ORCID iD orcid.org/0000-0002-8171-8107

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Date deposited: 11 Feb 2019 17:30
Last modified: 24 Sep 2019 01:01

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