Mechanism and Characteristics of the Surface Flashover on the Laminated Solid Dielectric in N2/O2 Mixture Gas

N2/O2 혼합가스 중 적층된 고체유전체에 대한 연면방전의 메커니즘과 특성

Lim, Dong-Young;Choi, Eun-Hyeok;Choi, Sang-Tae;Bae, Sungwoo;Lee, Kwang-Sik;Choi, Byoung-Ju

  • Received : 2015.05.11
  • Accepted : 2015.06.15
  • Published : 2015.08.31


This paper presents the surface flashover mechanism of a laminated solid dielectric and describes the surface flashover characteristics with the inherent capacitance of the laminated solid dielectric in a $N_2/O_2$ mixture gas (8:2) under an quasi uniform field. It was found that the electron emission at a cathode and the high-local electric field region around an anode were important factors to reasonably describe the surface flashover mechanism. The surface flashover voltage by the mechanism decreased with the inherent capacitance increase of the laminated solid dielectric. In addition to the surface flashover mechanism and its characteristics, the surface flashover voltage equations as a function of the inherent capacitance were derived by considering a gas pressure used in future eco-friendly GIS and the factors influencing the surface flashover.


Insulation;Inherent Capacitance;Insulation Technique;Solid Dielectric;Surface Flashover


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