Projects per year
Abstract
Interfaces between solid dielectric materials may exhibit lower breakdown strength compared to that associated with bulk breakdown of solid materials. A reason for such reduction is the presence of gas cavities which are formed at the interface. When the solid-solid interface is subjected to impulsive electrical stress, the enhanced electric field inside cavities may result in the development of initial (partial) discharges. This may ultimately lead to breakdown across the interface, resulting in the catastrophic failure of the entire insulation system. Therefore, it is paramount to understand the field distribution and ionisation processes within interfacial cavities, such that the behavior and strength of the insulation system can be fully predicted. The present paper considers a gas-filled cavity formed between poorly-conducting solids, subjected to a transient external electric field. The corresponding boundary value problem is defined and analytically solved, obtaining closed form solutions for the electric field distribution inside and around an isolated cavity. Results from model validation and intra-cavity field enhancement are presented, as well as brief discussion of other possible applications and future model extensions.
Original language | English |
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Number of pages | 4 |
Publication status | Published - 2 Sept 2021 |
Event | 8th Euro-Asian Pulsed Power Conference 2020 - Biarritz, France Duration: 29 Aug 2021 → 2 Sept 2021 http://eappc-beams2020.org/ |
Conference
Conference | 8th Euro-Asian Pulsed Power Conference 2020 |
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Abbreviated title | EAPPC-BEAMS-MG 2020 |
Country/Territory | France |
Period | 29/08/21 → 2/09/21 |
Internet address |
Keywords
- dielectric
- breakdown
- solid-solid interface
- pulsed power
- analytical model
Fingerprint
Dive into the research topics of 'Electric field inside a gas cavity formed at a solid-solid dielectric interface stressed with HV impulses'. Together they form a unique fingerprint.Projects
- 1 Finished
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Doctoral Training Partnership 2020-2021 University of Strathclyde | Wong, Timothy
Timoshkin, I. (Principal Investigator), MacGregor, S. (Co-investigator) & Wong, T. (Research Co-investigator)
EPSRC (Engineering and Physical Sciences Research Council)
1/10/20 → 10/09/24
Project: Research Studentship - Internally Allocated
Student theses
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On transient electric field and ionisation phenomena in gas and at dielectric interfaces under impulsive energisation
Wong, T. (Author), Timoshkin, I. (Supervisor) & MacGregor, S. (Supervisor), 10 Sept 2024Student thesis: Doctoral Thesis
Activities
- 1 Participation in conference
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8th Euro-Asian Pulsed Power Conference 2020
Wong, T. (Participant)
29 Aug 2021 → 2 Sept 2021Activity: Participating in or organising an event types › Participation in conference