Investigating the Effect of Axial Displacement of Transformer Winding on the Electromagnetic Forces

摘要

The working of the electrical network mainly depends on the working of the power transformer. Several important factors of the electrical power system such as efficiency, safety, and total losses are also affected by the power transformer. One of the most important factors for the designing of the power transformer is electromagnetic forces. In this paper, electromagnetic forces of the power transformer are calculated by using the finite element method with the help of two-dimensional models. When the transformer's windings are in the original initial designing position, the current and electromagnetic forces of the routine and short-circuit circumstances are familiar to the transformer designers. However, the effect of the displacement of the transformer's windings on the electromagnetic forces is not well known to the transformer designers. In this work, electromagnetic forces during the non-displaced (normal conditions) and displaced windings of the transformer are examined by using finite element analysis. The main aim of this study is to investigate the radial and axial force of the displaced winding. Numerical results of the radial forces of the non-displaced windings are also compared with the analytical technique.