Design and Modeling of Multi-Winding Transformers Interfacing Inverters and Mains

Abstract

The paper concerns the study of multi-winding transformers (MWT), with inverter fed LV primary windings and one MV secondary winding connected to the mains. Typical application fields are medium power WECSs, consisting of modular components (multi-module generator and transformer). The transformer design and modeling aspects are considered, and its performances are estimated, considering inverter command parameters, current waveforms, copper and core losses, accounting for the effects due to harmonics. Index Terms-multi-winding transformers, transformer design, transformer model, inverter fed transformer losses.