EXACT LOSS DETERMINING OF POWER STATION BUS DUCT SHELL WITH ISOLATED SHELLS AND PHASES BY CALCULATING OF INDUCED CURRENT IN COMSOL SOFTWARE ENVIRONMENT

Loss in the power station bus duct is one of the technical features of these equipment’s, and one of their designing parameters. The high rate of loss in the bus duct shell causes the heat in the shell and reduction of the bus duct current capacity. Various analytic methods have been suggested to calculate this parameter. Whereas, the exact calculation of the shell loss is crucial with methods that are more effective and considering the triple-phases mutual effects, proximity effect, cortical effect, and bus duct exact modeling. In this paper, the impact rate of bus duct was identified and the induced current of every phase shell was calculated separately with different bus duct designing state by the actual modeling of every three-bus duct phase in the COMSOL software environment considering the time change and phasesʹ current and also cortical effect. In the following, the overall electric loss rate was determined by simulation results. Eventually, the shell loss change curve was extracted based on the shell thickness, and the results were analyzed.