An Extraction Method of Key Mode for Wide-band Oscillation in Power Electronic-based Power Systems

With the development and popularization of power electronic-based power systems, the wide-band oscillation becomes more and more serious around the world. In order to better represent and describe the wide-band oscillation, this paper presents a mode extraction method for the wide-band oscillation in the modern power electronic-based power systems. The effective value (RMS) representation is developed from the instantaneous value representation to observe the oscillation more intuitive. Based on the matrix pencil algorithm and active power data, the typical oscillation mode information can be extracted such as oscillation frequency, damping ratio, residue, and the eigenvalue. The effectiveness of the proposed method has been verified through the case study according actual oscillation measurement data.