期刊
APPLIED SCIENCES-BASEL
卷 10, 期 19, 页码 -出版社
MDPI
DOI: 10.3390/app10196673
关键词
surface discharge; epoxy resin; electronegative gas; high-voltage power equipment
类别
资金
- National Research Foundation of Korea (NRF) - Ministry of Education [2017R1D1A3B03035693]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korea government (MOTIE) [20192010107050]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20192010107050] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2017R1D1A3B03035693] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study presents the surface discharge characteristics of insulating gases, including sulfur hexafluoride (SF6), dry air, and N-2, under a non-uniform field. Surface discharge experiments were conducted, with the gas pressure ranging from 0.1 to 0.6 MPa, on samples of epoxy dielectrics under an AC voltage. The experimental results showed that the surface insulation performance significantly improved in insulating gases possessing electronegative gases, such as SF6 and dry air. Surface flashover voltages of SF6 were saturated with an increasing pressure, compared to dry air and N-2. The surface discharge mechanism is proposed to explain the improvement and saturation of dielectric characteristics of the electronegative gas in complex dielectric insulations, as well as its influence on the surface flashover voltage. As an application, an insulation design method is discussed with regards to replacing SF6 gas in high-voltage power equipment based on the knowledge of the physics behind gas discharge.
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