Research on Axial Stability of Power Transformer Windings

Abstract

In this paper, the distribution of magnetic flux leakage and force in transformer short circuit are calculated by using two-dimensional finite element model of transformer. Based on the calculation of magnetic field and force, the blocks and disks of Transformer Winding models of three-dimensional single-coil winding are further analyzed. The factors affecting the axial stability of transformer are studied. Through finite element simulation software, the influence of three working conditions on the axial stability of winding are calculated, including the accumulation of multiple short-circuit impact, assembly defects and different design of supporting structure. This paper lays a foundation for the subsequent study of the axial stability of transformer and the cumulative effect of short circuit.