Simulation Study on Electromagnetic Loss and Temperature Rise of Dry Type Air Reactor on Steel Buildings: High Voltage and Insulation Technology

The changing magnetic field of air reactor will cause additional electromagnetic loss and eddy current effect on the surrounding conductor, which will cause temperature rise. Based on the actual structure of reactor, the three-dimensional numerical modeling is carried out, and the magnetic field distribution within 50m around three groups of three-phase reactors arranged in zigzag configuration is simulated. The eddy current distribution and Joule heat distribution of the steel house 11.25m away from the reactor center are obtained under the varying magnetic field at the frequency of 50 Hz. Finally, the calculated Joule heat is used as the volume heat source to analyze the temperature rise of the steel house. When the ambient temperature is 20 °C, the maximum temperature rise of the whole house appears in the front wall of the house close to the reactor, and the maximum temperature rise can reach 6.988 °C.