Simple and Robust Equivalent Circuit of Real Transformer for Harmonic Excitation

Abstract

In the case of harmonic excitation the ferromagnetic material can be described by a set of experimental waveforms from the small system of exciting voltages. If important harmonics of waveforms are used, the response for any excitation can be calculated with a high accuracy. The equivalent circuit can be derived from important harmonics of current spectrum. In the case of transformer arbitrary excitation more sophisticated equivalent circuit is necessary.