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SF6 gas mixtures are expected to replace SF6 gas and applied in gas insulated equipment. This paper presented the characteristics of epoxy resin insulators flashover in pure SF6, SF6-N2 and SF6-CO2 binary gas mixtures which the ratio was 2∶8 and 3∶7, SF6-CF3I-N2 and SF6-CF3I-CO2 ternary gas mixtures which the ratio was 1∶2∶7 between 0.1MPa and 0.25MPa gas pressure under uniform electric field, and...
With this expected future advance of HVDC, the use of gas insulated transmission lines (GIL) for dc application are getting increasingly interesting. For now, the problem of surface charge accumulation on gas-insulator interface is one of the critical factors for the development of DC-GIL. In many previous works, the characteristics of surface charges accumulation on insulator was investigated. However,...
With the development of the electric power and railway industry, more and more SF6 gas-insulated equipments have been applied. However the greenhouse effect and environmental pollution that caused by SF6 gas has been paid attention in recent years. Therefore looking for the SF6 alternative gas without reducing its insulation performance becomes one of the research hotspots. Epoxy resin has been widely...
SF6 gas is used as the insulating medium in cubicle gas insulated switchgear (C-GIS) in low pressure (below 0.25 MPa). SF6 gas has several shortcomings, such as expensive price, significant greenhouse effect, therefore, exploring alternative media of SF6 gas is of important theoretical value and practical application significance. This paper focuses on the C-GIS switchgear which uses SF6 gas as insulating...
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