Mechanism and Characteristics of the Surface Flashover on the Laminated Solid Dielectric in N 2 /O 2 Mixture Gas

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 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.

[1]  K. Stark,et al.  Electric Strength of Irradiated Polythene , 1955, Nature.

[2]  Peter H. Fischer,et al.  The Short-Time Electric Breakdown Behavior of Polyethylene , 1974, IEEE Transactions on Electrical Insulation.

[3]  H. C. Miller.  Surface flashover of insulators , 1988 .

[4]  D. Watson.  Dielectric Breakdown of Perspex Electrets in Nonuniform Fields , 1973, IEEE Transactions on Electrical Insulation.

[5]  Eric Beyne,et al.  Effect of test structure on electromigration characteristics in three-dimensional through silicon via stacked devices , 2015 .

[6]  T. Oomori,et al.  Development of SF$_{6}$-Free 72.5 kV GIS , 2007, IEEE Transactions on Power Delivery.

[7]  H. Okubo,et al.  Application of functionally graded material for solid insulator in gaseous insulation system , 2006, IEEE Transactions on Dielectrics and Electrical Insulation.

[8]  M. Sakaki,et al.  Flashover mechanisms of bridged vacuum gaps based on cathode electric field measurement , 2015, IEEE Transactions on Dielectrics and Electrical Insulation.

[10]  J. Harris.  Multilayer High-Gradient Insulators , 2007, 2006 International Symposium on Discharges and Electrical Insulation in Vacuum.

[11]  H. Okubo,et al.  Application of functionally graded material for reducing electric field on electrode and spacer interface , 2010, IEEE Transactions on Dielectrics and Electrical Insulation.

[12]  H. C. Miller,et al.  Gases released by surface flashover of insulators , 1987 .

[13]  T. Sudarshan,et al.  dc surface flashover mechanism along solids in vacuum based on a collision‐ionization model , 1988 .

[14]  Chen Li,et al.  Dielectric surface preflashover processes in vacuum , 1994 .