The Monitor of Inter-area Oscillation Based on Wide Area Measurement System

With the expansion of interconnected power grid, the phenomenon of low frequency oscillation appears unavoidably. In this paper, the existing oscillation mode identifying methods are analyzed from the viewpoint of calculation speed, criterion, calculation accuracy, etc. The applicability of two methods, Prony and ESPRIT are compared mainly. Based on the above research, we put forward a new idea of monitoring power system low frequency oscillation based on WAMS.