A phasor estimation algorithm for a decaying AC component

Conventional phasor estimation methods can causes error if the envelope of the signal is changed according to time. In this paper, a modified dynamic phasor estimation method was proposed to overcome the disadvantages of conventional phasor estimation methods. To evaluate the performance of the proposed method, a fault location algorithm which uses the proposed phasor estimation method was tested over varying fault distances and fault resistances. The fault location result using the proposed phasor estimation shows a very small error compared to fault location methods using conventional phasor estimation.