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 th...
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| Format: | Article |
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MDPI AG
2013-02-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/6/2/934 |
| _version_ | 1817991498181902336 |
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| author | Tao Yuan Qing Yang Chilong Jiang Wenxia Sima Paul Lewin |
| author_facet | Tao Yuan Qing Yang Chilong Jiang Wenxia Sima Paul Lewin |
| author_sort | Tao Yuan |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-14T01:14:08Z |
| format | Article |
| id | doaj.art-536158970816463e8b960e90a89b6830 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-14T01:14:08Z |
| publishDate | 2013-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-536158970816463e8b960e90a89b68302022-12-22T02:20:57ZengMDPI AGEnergies1996-10732013-02-016293495210.3390/en6020934Modeling of the Partial Discharge Process in a Liquid Dielectric: Effect of Applied Voltage, Gap Distance, and Electrode TypeTao YuanQing YangChilong JiangWenxia SimaPaul LewinThe 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.http://www.mdpi.com/1996-1073/6/2/934partial dischargedischarge currentmicroscopic modelspace charge |
| spellingShingle | Tao Yuan Qing Yang Chilong Jiang Wenxia Sima Paul Lewin Modeling of the Partial Discharge Process in a Liquid Dielectric: Effect of Applied Voltage, Gap Distance, and Electrode Type Energies partial discharge discharge current microscopic model space charge |
| title | Modeling of the Partial Discharge Process in a Liquid Dielectric: Effect of Applied Voltage, Gap Distance, and Electrode Type |
| title_full | Modeling of the Partial Discharge Process in a Liquid Dielectric: Effect of Applied Voltage, Gap Distance, and Electrode Type |
| title_fullStr | Modeling of the Partial Discharge Process in a Liquid Dielectric: Effect of Applied Voltage, Gap Distance, and Electrode Type |
| title_full_unstemmed | Modeling of the Partial Discharge Process in a Liquid Dielectric: Effect of Applied Voltage, Gap Distance, and Electrode Type |
| title_short | Modeling of the Partial Discharge Process in a Liquid Dielectric: Effect of Applied Voltage, Gap Distance, and Electrode Type |
| title_sort | modeling of the partial discharge process in a liquid dielectric effect of applied voltage gap distance and electrode type |
| topic | partial discharge discharge current microscopic model space charge |
| url | http://www.mdpi.com/1996-1073/6/2/934 |
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