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Modeling of the Partial Discharge Process in a Liquid Dielectric: Effect of Applied Voltage, Gap Distance, and Electrode Type

Modeling of the Partial Discharge Process in a Liquid Dielectric: Effect of Applied Voltage, Gap Distance, and Electrode Type
Modeling of the Partial Discharge Process in a Liquid Dielectric: Effect of Applied Voltage, Gap Distance, and Electrode Type
The partial discharge (PD) process in liquid dielectrics is influenced by several factors. Although the PD current contains the information representing the discharge process during the PD event, it is difficult to determine the detailed dynamics of what is happening in the bulk of the liquid. In this paper, a microscopic model describing the dynamics of the charge carriers is implemented. The model consists of drift-diffusion equations of electrons, positive and negative ions coupled with Poisson’s equation. The stochastic feature of PD events is included in the equation. First the model is validated through comparison between the calculated PD current and experimental data. Then experiments are conducted to study the effects of the amplitude of the applied voltage, gap distance and electrode type on the PD process. The PD currents under each condition are recorded. Simulations based on the model have been conducted to analyze the dynamics of the PD events under each condition, and thus explain the mechanism of how these factors influence the PD events. The space charge generated in the PD process is revealed as the main reason affecting the microscopic process of the PD events.
1996-1073
934-952
Sima, W
745ac9d8-c134-4bb5-808c-0379c6885b38
Jiang, C
2304a82c-10ad-4029-826e-86f71853020e
Lewin, P L
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Yang, Q
a9e4975a-c818-4096-b893-ca9840cb1380
Yuan, T
41a73651-718c-463a-9ff7-89d47577a217
Sima, W
745ac9d8-c134-4bb5-808c-0379c6885b38
Jiang, C
2304a82c-10ad-4029-826e-86f71853020e
Lewin, P L
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Yang, Q
a9e4975a-c818-4096-b893-ca9840cb1380
Yuan, T
41a73651-718c-463a-9ff7-89d47577a217

Sima, W, Jiang, C, Lewin, P L, Yang, Q and Yuan, T (2013) Modeling of the Partial Discharge Process in a Liquid Dielectric: Effect of Applied Voltage, Gap Distance, and Electrode Type. Energies, 6 (2), 934-952. (doi:10.3390/en6020934).

Record type: Article

Abstract

The partial discharge (PD) process in liquid dielectrics is influenced by several factors. Although the PD current contains the information representing the discharge process during the PD event, it is difficult to determine the detailed dynamics of what is happening in the bulk of the liquid. In this paper, a microscopic model describing the dynamics of the charge carriers is implemented. The model consists of drift-diffusion equations of electrons, positive and negative ions coupled with Poisson’s equation. The stochastic feature of PD events is included in the equation. First the model is validated through comparison between the calculated PD current and experimental data. Then experiments are conducted to study the effects of the amplitude of the applied voltage, gap distance and electrode type on the PD process. The PD currents under each condition are recorded. Simulations based on the model have been conducted to analyze the dynamics of the PD events under each condition, and thus explain the mechanism of how these factors influence the PD events. The space charge generated in the PD process is revealed as the main reason affecting the microscopic process of the PD events.

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Published date: 8 February 2013
Organisations: EEE

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Local EPrints ID: 348211
URI: http://eprints.soton.ac.uk/id/eprint/348211
ISSN: 1996-1073
PURE UUID: 9bbf8285-4bb2-4c69-9575-ea690909cc71

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Date deposited: 08 Feb 2013 13:07
Last modified: 20 Nov 2021 13:46

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Contributors

Author: W Sima
Author: C Jiang
Author: P L Lewin
Author: Q Yang
Author: T Yuan

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