Abstract:

Abstract:With the further development of intelligent substations construction,a large quantity of intelligent equipment is locally mounted in outdoor cabinets.Due to higher requirements on protection grade of outdoor cabinets,their inner space is relatively airtight,and their internal ambient temperature is liable to be affected by heat consumption of internal devices and external solar radiation.On the basis of the research on clear sky solar radiation model in a certain region of Nanjing,solar heat gain of outdoor cabinets is calculated.A rational way of ventilation and heat dissipation is designed based on the calculated result in conjunction with the simulation of ICEPAK software,providing guarantees for the reliable operation of intelligent equipment in the cabinets.