Abstract:Distribution equipment in substation distribution room has stringent requirements on environment temperature and humidity, so it is necessary to study the distribution law of temperature and humidity in distribution room, which is helpful to improve the reliability of distribution equipment. According to the energy transfer equation related to temperature calculation and the gas diffusion equation related to humidity calculation, it can be seen from the theoretical calculation formula that the direct calculation involves multivariable coupling, so it is difficult to solve.In this paper, the finite element analysis software ANSYS is used to simulate the temperature field and humidity field in the distribution room. Firstly, the simulation calculation model is established according to the actual typical distribution room, and the finite element mesh is divided accurately. Secondly, the simulation parameters are set according to the field operation, then the horizontal distribution of indoor temperature field and humidity field is obtained by the simulation calculation model.Then, by changing the flow rate of the fan, the effect of the change of the flow rate of the fan on the internal temperature of the distribution cabinet is analyzed, and the distribution law of the temperature field and the humidity field in the distribution room is summarized.