SF₆/N₂ 혼합가스의 불평등 전계 절연파괴전압을 이용한 345㎸급 GIL설계 최대전계 산출

Since more than three decades, SF? has been widely used for Gas Insulated power apparatus due to its plausible insulation characteristics, however, its high greenhouse gas emission becomes one of the hot environmental issues. In this respect, a mixture of SF? with N₂ was proposed to be 8 to 2. but its related insulation characteristics have not yet been systematically investigated for the application to Gas Insulated transmission-Line(GIL) which is effective for underground power transmission. In this paper, an experimental investigation on the breakdown characteristics of gas mixture using 800㎸ Gas chamber. Their results could be the fundamental base data to calculate the maximum electric filed produced by the structure of GIL. In this way, the relevant values of the design parameters related to the real scale conductor or enclosure of GIL can be deduced.