| 摘要 |
<p>A method for preventing liquefaction of sulphur hexafluoride gas in a high-voltage electrical device. The high-voltage electrical device is provided thereon with a sulphur hexafluoride auxiliary gas storage tank (1), a heating apparatus (3) and a connecting pipe (2). A sulphur hexafluoride gas chamber of the high-voltage electrical device communicates with the sulphur hexafluoride auxiliary gas storage tank via the connecting pipe. By detecting environmental temperature, gas temperature and gas density, when the environmental temperature of a high-voltage electrical device main body falls to possibly cause sulphur hexafluoride gas to liquefy, the heating apparatus starts to heat the sulphur hexafluoride auxiliary gas storage tank, the gas in the auxiliary gas storage tank which could experience temperature rise and forms a temperature difference with the sulphur hexafluoride gas in the sulphur hexafluoride gas chamber to form heat convection, so as to rapidly and directly transfer heat to the sulphur hexafluoride gas chamber of the sulphur hexafluoride high-voltage electrical device, so that the temperature of the sulphur hexafluoride gas in the sulphur hexafluoride gas chamber rises, preventing gas liquefaction or over-liquefaction, and ensuring safe operation of the high-voltage electrical device.</p> |
