Temperature Distribution and Pressure Response of GIS on Partially Overheated State

A feasible way to detect the partially overheated disfigurement of GIS is provided by Beattie-Bridgman equation which depicts the relationship between the temperature and pressure of SF6. According to the actual structure of GIS, we build a model for simulating the temperature and pressure distribution of GIS on its overheated state, and the simulated results are investigated by experiments. The studied results show that on the partially overheated state of GIS, the temperature distribution of SF6 and heat-section is uneven, which is responded by the pressure of SF6, namely the temperature-pressure response. The temperature-pressure response is influenced by the varieties of ambient temperature and the heat-section power. If the ambient temperature rises, the gas pressure increases obviously too even if the heat-section temperature is constant. The influence of heat-section power to the temperature-pressure response is negligible in the engineering calculation.