Forced Oscillation Source Location In Power Systems Using Synchrosqueezing Transform Based Time-Frequency Representation

Abstract

With the increasing adoption of phasor measurement units in power systems, they offer dependable data support for the rapid and precise location of forced oscillation sources. A location approach for forced oscillation sources in the time-frequency domain is proposed in this paper, utilizing the short-time fourier transform based synchrosqueezing transform. Firstly, this method applies synchrosqueezing transform to the phasor measurement information, establishes a synchrosqueezing transform coefficient matrix, and determines the frequency band corresponding to the forced oscillation based on relative energy weighting. Then, based on the derived time-frequency domain dissipation energy flow calculation method, the dissipation energy of the frequency band where the forced oscillation occurs is calculated, furthermore, the characteristics of time-frequency domain dissipation energy flow are used to determine the location of the forced oscillation source. The proposed approach’s effectiveness and precision are then validated using simulated data of forced oscillations in the WECC 179 bus power system.