Numerical Prediction of Magnetizing Inrush Current in Power Transformers on the basis of Design Parameters

This paper presents an analytical method to predict the maximum inrush current for three phase power transformer. The calculation of transformer design parameters and the method for calculation of peak inrush current is proposed. The magnitude of maximum inrush current by analytical method and the results obtained from simulation in PSCAD/EMTDC are in agreement with one another. This method is very useful to estimate the maximum inrush current before manufacturing of the power transformer.