The safe and reliable operation of insulation material used in key high voltage compo-nents under extreme environmental conditions represents the major concerns for man-ufacturers and operators of More Electric Aircra...The safe and reliable operation of insulation material used in key high voltage compo-nents under extreme environmental conditions represents the major concerns for man-ufacturers and operators of More Electric Aircrafts(MEA).Surface discharge occurring in high current carrying components in DC power system diminishes the insulation material’s performance and life,especially at high-temperature conditions.Here,the surface discharge behaviour of two commonly used high-temperature insulation materials,ethylene-tetrafluoroethylene(ETFE)and polyetheretherketone(PEEK)is studied at different temperatures under ramp and DC voltages.Extracted partial discharge(PD)features are presented and the impact of voltage polarity on surface discharge propagation is discussed.Our studies reveal that,while both materials exhibit non-linear PD behaviour with respect to their electrical conductivity,ETFE generally shows PDs with higher in-tensity at high temperature above 100°C with a higher possibility of surface discharge due to its lower permittivity.Overall,the PD mechanism in high-temperature,DC voltage applications is explored,and a basis for the selection of high-temperature PD suppressing materials is developed.展开更多
基金NASA,Raytheon Technology Research Centre,and by the National Science Foundation(contract No.1650544).
文摘The safe and reliable operation of insulation material used in key high voltage compo-nents under extreme environmental conditions represents the major concerns for man-ufacturers and operators of More Electric Aircrafts(MEA).Surface discharge occurring in high current carrying components in DC power system diminishes the insulation material’s performance and life,especially at high-temperature conditions.Here,the surface discharge behaviour of two commonly used high-temperature insulation materials,ethylene-tetrafluoroethylene(ETFE)and polyetheretherketone(PEEK)is studied at different temperatures under ramp and DC voltages.Extracted partial discharge(PD)features are presented and the impact of voltage polarity on surface discharge propagation is discussed.Our studies reveal that,while both materials exhibit non-linear PD behaviour with respect to their electrical conductivity,ETFE generally shows PDs with higher in-tensity at high temperature above 100°C with a higher possibility of surface discharge due to its lower permittivity.Overall,the PD mechanism in high-temperature,DC voltage applications is explored,and a basis for the selection of high-temperature PD suppressing materials is developed.
