Eddy Current and Magneto-Structural Analysis on Transformer Winding with Continuously Transposed Conductors

Abstract

Due to the upgradation of power systems, the power rating of power transformers increases which requires more efficiency and good winding mechanical strength. This has been made possible with the use of Continuously Transposed Conductor (CTC) windings in power transformer design. CTC winding reduces eddy losses and provides uniform temperature distribution throughout the winding and high mechanical withstand capability in short circuit conditions. In this work, CTC and the equivalent DISC windings of equally rated power transformers of the same manufacturer are considered for the analysis. The eddy current loss and winding deformation under short circuit force of both the windings are computed using finite element based field solvers and compared.