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Space charge modelling in HVDC extruded cable insulation

Space charge modelling in HVDC extruded cable insulation
Space charge modelling in HVDC extruded cable insulation
With the growing interest in the development of HVDC cable technologies, the impact of space charge accumulation inside the polymeric insulation has attracted more attentions and the field distribution across the insulation has become the focus point of research. In this paper, several modifications have been applied on the bipolar charge transport model developed for the cable geometry. Based on many experimental observations, a threshold electric field at which the charge injection takes place was introduced. Considering the practical operation of HVDC cables, the thermal transient effects on space charge behaviors were particularly taken into account. A changing current flow has been applied in the core of a MV size cable, in order to further study the charge dynamics and to anticipate the field distribution within the insulation. The simulation results suggest that the thermal transient can affect the amount of injected charge and the charge movement significantly. The field inversion can only take place with higher temperature and larger temperature gradient, and this can be maintained even with temperature decreasing.
43 - 50
Zhan, Yunpeng
5d162333-4c63-4b95-9a11-87d6b438aea0
Chen, Guanghui
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Hao, Miao
fb7006e0-07c0-46f5-9279-e30a7d3bd614
Zhan, Yunpeng
5d162333-4c63-4b95-9a11-87d6b438aea0
Chen, Guanghui
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Hao, Miao
fb7006e0-07c0-46f5-9279-e30a7d3bd614

Zhan, Yunpeng, Chen, Guanghui and Hao, Miao (2019) Space charge modelling in HVDC extruded cable insulation. IEEE Transactions on Dielectrics & Electrical Insulation, 26 (1), 43 - 50. (doi:10.1109/TDEI.2018.007413).

Record type: Article

Abstract

With the growing interest in the development of HVDC cable technologies, the impact of space charge accumulation inside the polymeric insulation has attracted more attentions and the field distribution across the insulation has become the focus point of research. In this paper, several modifications have been applied on the bipolar charge transport model developed for the cable geometry. Based on many experimental observations, a threshold electric field at which the charge injection takes place was introduced. Considering the practical operation of HVDC cables, the thermal transient effects on space charge behaviors were particularly taken into account. A changing current flow has been applied in the core of a MV size cable, in order to further study the charge dynamics and to anticipate the field distribution within the insulation. The simulation results suggest that the thermal transient can affect the amount of injected charge and the charge movement significantly. The 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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Accepted/In Press date: 3 June 2018
Published date: February 2019

Identifiers

Local EPrints ID: 421713
URI: https://eprints.soton.ac.uk/id/eprint/421713
PURE UUID: 4a7bff25-9bbb-4cba-b829-e5363114103c
ORCID for Yunpeng Zhan: ORCID iD orcid.org/0000-0002-8171-8107

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Date deposited: 22 Jun 2018 16:30
Last modified: 20 Jul 2019 01:30

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Contributors

Author: Yunpeng Zhan ORCID iD
Author: Guanghui Chen
Author: Miao Hao

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