Parameter Estimation of Y-$\Delta$ Transformer Using the Least Square Method

최소자승법을 이용한 Y-$\Delta$ 변압기 파라미터 추정 방법

This paper proposes a parameter estimation technique of a power transformer. Based on the combined equation, it estimates separately the primary and secondary leakage inductances, winding resistances using the least square method from the instantaneous voltages and currents in the steady state. The performance of the proposed technique was investigated by varying the cut-off frequency of the filter and the number of samples per cycle. The technique estimates the parameters with higher sampling frequencies.