engleski

Appropriate Modelling of Transformer High Current Leads in 3D FEM

In generator step-up power transformer units (GSU), low voltage windings carry sufficiently high currents which generate high magnetic field levels. Therefore, when it comes to 3D finite element method (FEM) calculation of the stray losses of such transformer units, it is not enough to model low voltage windings just as two cylinders. Low voltage leads should also be modelled, and it is necessary to know how to accurately model and connect leads to the windings. Modelling windings and leads in 3D FEM is very demanding and calculation is time- consuming, so an appropriate model of leads can therefore reduce the mesh size and solver time. In this paper, multiple modelling approaches are tested and compared with the model without leads.

leads, high current windings, stray losses, 3D FEM

nije evidentirano