Source Localization of Low Frequency Oscillations in Power Systems and Methods of Damping
One of the urgent problems of modern power system are low frequency oscillations (hereinafter LFO) as they reduce the static and dynamic stability of power systems. Today the important task is to detection and localization of sources of LFO and means of effectively damping such vibrations. The basic characteristics of oscillation frequency and amplitude of voltage at station buses obtained using devices phazor measurement units (hereinafter, PMU). In the software-hardware complex Real-Time Digital Simulation (RTDS) the study method for the determination sources of perturbations that give rise to low-frequency oscillations and suppression of low-frequency oscillations. On the basis of measurements obtained using the established in different parts of the power system, PMU for different types of periodic perturbations defined characteristics of oscillations, indicating the location of source of low frequency oscillations. Reviewed and verified way of reducing the influence of LFO on operation of generator. This regularity allows to obtain information about the location of source periodic perturbation, leading to the emergence of LFO on the grid. Further work aimed at creation of algorithm fast detection source LFO based on vector measurements, and research methods reduce the influence of LFO on synchronous generator will help determine the optimal setting of the automatic regulator of excitation for maximum damping occurs in the LFO power system.
