Three-phase core-type transformer model investigation taking into account hysteresis phenomena in asymmetric load mode

Abstract

Transformer modeling as electrical and power equipment is important engineering research and design activities. Most of the known concepts focus on modeling a 3-phase or multi-phase transformer using methods such as total impedance matrix calculations, search for leakage induction, the use of specialized programs such as Ansys Maxwel, FEM, TE3D, which do not have the flexible ability to control the saturation characteristic of the core of the magnetic circuit, tied to the nonlinearity of the characteristics of steel as a property of the magnetic circuit of the transformer. The system of the structural scheme of the dynamic model of a three-phase core-type transformer taking into account the hysteresis and saturation phenomenon is given. The interdependence of transformer core magnetic fluxes is taken into account. The electrical and magnetic parameters of the transformer mode in the visual programming environment are investigated. Linear symmetric and asymmetric loads are emulatedThe influence of the nature of the load on the voltages of the secondary windings and the currents of the primary windings is noted according to the level of general harmonic distortions. The presented results provide an opportunity for a more accurate assessment of magnetic flux disturbances in a three-phase transformer.