Analysis and Calculation of the Operation Characteristics for Powerformer

A mathematical model of operation characteristics for generator is built through electric machines and electromagnetic field theory, and the method of solving the two-dimension electromagnetic field with FEM is given. To satisfy the demand of calculation of operation characteristics, the electromagnetic field with finite element method and external circuit of generator are coupled to calculate the operation curves for Powerformer under different conditions, including short-circuit characteristic, open-circuit characteristic, regulation characteristic, and external characteristic. Comparing with the experimental results, it is proved that the simulation results is right, which provides some references for the practical application of Powerformer.