Calculation and Analysis of The Radial Short-circuit Electromotive Force of The Converter Transformer Winding

Abstract

For a 530KV/406MVA single-phase dual-winding converter transformer, according to its actual operating circuit, set a three-phase short-circuit fault to obtain the maximum short-circuit current. The finite element software comsol is used to build a two-dimensional axisymmetric model of the transformer, the leakage magnetic density and radial short-circuit electromotive force of the high and low voltage windings are obtained, and the radial steady-state check of the converter transformer is performed. The calculation and analysis results show that the model and calculation method can realize the calculation of the radial short-circuit force of the windings of the converter transformer and the calculation of the radial mechanical strength.