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Simulating surface charge dynamics

Simulating surface charge dynamics
Simulating surface charge dynamics
Surface charge dynamics can play an important role in electric field distributions in both AC and DC insulation systems. In this paper the theory behind surface charge dynamics is introduced with a particular focus on the calculation of surface divergence; an operator which is used to determine movement of charge constrained to a surface. A detailed discussion of the model implementation is provided and validated against an analytical solution. Surface charge dynamics in AC and DC insulation systems are then investigated. Assuming the measurement data in the literature is representative it is demonstrated that surface currents have the capability to significantly alter electric field distributions in voids, even over the timescales of an AC cycle.
charge transport, finite element methods, surface charge density
1070-9878
19 - 27
Callender, George
4189d79e-34c3-422c-a601-95b156c27e76
Goddard, Kevin
fe2a2194-8b55-43c1-bdca-341691b71b2d
Lewin, Paul
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Callender, George
4189d79e-34c3-422c-a601-95b156c27e76
Goddard, Kevin
fe2a2194-8b55-43c1-bdca-341691b71b2d
Lewin, Paul
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e

Callender, George, Goddard, Kevin and Lewin, Paul (2021) Simulating surface charge dynamics. IEEE Transactions on Dielectrics & Electrical Insulation, 28 (1), 19 - 27, [9351880]. (doi:10.1109/TDEI.2020.008961).

Record type: Article

Abstract

Surface charge dynamics can play an important role in electric field distributions in both AC and DC insulation systems. In this paper the theory behind surface charge dynamics is introduced with a particular focus on the calculation of surface divergence; an operator which is used to determine movement of charge constrained to a surface. A detailed discussion of the model implementation is provided and validated against an analytical solution. Surface charge dynamics in AC and DC insulation systems are then investigated. Assuming the measurement data in the literature is representative it is demonstrated that surface currents have the capability to significantly alter electric field distributions in voids, even over the timescales of an AC cycle.

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Accepted/In Press date: 4 June 2020
e-pub ahead of print date: 9 February 2021
Keywords: charge transport, finite element methods, surface charge density

Identifiers

Local EPrints ID: 443437
URI: http://eprints.soton.ac.uk/id/eprint/443437
ISSN: 1070-9878
PURE UUID: 8cfcfc5f-f434-4a0e-898e-09d66c5f9062

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Date deposited: 25 Aug 2020 16:32
Last modified: 03 Sep 2021 04:01

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Contributors

Author: George Callender
Author: Kevin Goddard
Author: Paul Lewin

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