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Critical analysis of partial discharge dynamics in air filled spherical voids

Critical analysis of partial discharge dynamics in air filled spherical voids
Critical analysis of partial discharge dynamics in air filled spherical voids
In this paper partial discharge (PD) is investigated inside a spherical air filled void at atmospheric pressure using a drift diffusion model. Discharge dynamics consisted of an electron avalanche transitioning into positive streamer, in agreement with earlier work on dielectric barrier discharges. Different model configurations were utilised to test many of the concepts employed in semi-analytical PD activity models, which use simplistic descriptions of the discharge dynamics. The results showed that many of these concepts may be erroneous, with significant discrepancies between the canonical reasoning and the simulation results. For example, the residual electric field, the electric field after a discharge, is significantly lower than the estimates used by classical PD activity models in the literature.
1361-6463
Callender, George
4189d79e-34c3-422c-a601-95b156c27e76
Golosnoy, Igor O.
40603f91-7488-49ea-830f-24dd930573d1
Lewin, Paul
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Rapisarda, Paolo
79efc3b0-a7c6-4ca7-a7f8-de5770a4281b
Callender, George
4189d79e-34c3-422c-a601-95b156c27e76
Golosnoy, Igor O.
40603f91-7488-49ea-830f-24dd930573d1
Lewin, Paul
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Rapisarda, Paolo
79efc3b0-a7c6-4ca7-a7f8-de5770a4281b

Callender, George, Golosnoy, Igor O., Lewin, Paul and Rapisarda, Paolo (2018) Critical analysis of partial discharge dynamics in air filled spherical voids. Journal of Physics D: Applied Physics, 51. (doi:10.1088/1361-6463/aaae7c).

Record type: Article

Abstract

In this paper partial discharge (PD) is investigated inside a spherical air filled void at atmospheric pressure using a drift diffusion model. Discharge dynamics consisted of an electron avalanche transitioning into positive streamer, in agreement with earlier work on dielectric barrier discharges. Different model configurations were utilised to test many of the concepts employed in semi-analytical PD activity models, which use simplistic descriptions of the discharge dynamics. The results showed that many of these concepts may be erroneous, with significant discrepancies between the canonical reasoning and the simulation results. For example, the residual electric field, the electric field after a discharge, is significantly lower than the estimates used by classical PD activity models in the literature.

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Accepted/In Press date: 12 February 2018
e-pub ahead of print date: 12 February 2018
Published date: 28 February 2018

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Local EPrints ID: 417954
URI: https://eprints.soton.ac.uk/id/eprint/417954
ISSN: 1361-6463
PURE UUID: 23e9e241-2155-45b0-b486-a003a7b0f11e

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Date deposited: 19 Feb 2018 17:30
Last modified: 14 Mar 2019 05:15

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Contributors

Author: George Callender
Author: Igor O. Golosnoy
Author: Paul Lewin
Author: Paolo Rapisarda

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