Simplified thermal model of traction transformer for commercial use

This article deals with the thermal analysis of traction transformer. The traction transformers are special kind of a transformers. The windings have lots of voltage terminals for various voltage levels and various supply systems. In the article is described the thermal mathematical model of traction transformer. The possibilities of simplification of calculation model and high accuracy of simulation results are compared with reality. The traction transformer is placed on the deck of rail vehicle. The transformer cooling is provided by two cooling systems. Inner cooling system is made by the mineral oil. The oil is forced cooled by switching an air-fan. The fan switching dependents on temperature of mineral oil. This reduced model is used for calculation of total energy of rail vehicle.

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