Impact of Multilevel Inverter Supply on Transformer Losses

The impact of multilevel inverter supply on transformer losses is studied. We evolved a system in MATLAB simulink for 2KVA three phase transformer and three phase Five-level T-type inverter. We perform open circuit and short circuit test on inverter fed transformer with and without filter, the filter used in this system is active filter. We demonstrate as switching frequency increase the increase in the losses of the transformer is negligible. The amplitude modulation index has significant effect on losses of transformer as amplitude modulation index increase the transformer losses also increases.