Hysteresis characteristic analysis of transformer under different excitations using real time measurement

A simplified method for the analysis of hysteresis characteristics in a transformer under nonsinusoidal excitation is discussed. The nonsinusoidal sin m (wt) waveforms are used in the experiments. The hysteresis analysis is treated as a shape identification problem and is solved using the piecewise curve fitting technique. The proposed method uses a real-time data acquisition system, for measurement data and calculates hysteresis loop and loss directly from those data. Expressions for the hysteresis loop and energy loss using the proposed method are shown to agree well with analog measurements. The discrepancy between these two methods is less than 0.65%