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A STUDY ON MAGNETIZING INRUSH CURRENT OF DIFFERENT CORE MATERIALS

Transformer inrush currents were traditionally evaluated by means of Fourier analysis. Such approach affects the design of transformer differential relays concerning their immunity to inrush currents. This paper presents a statistical tool named maximum entropy method (MEM), which seems to provide a reliable and computationally efficient tool for identification inrush currents on two different “C” core materials, SiFe and amorphous. Proposed technique is tested and implemented by using real time values in MATLAB environment.