Definition Research And Visualisation Low Frequency Oscillations

Abstract

From a practical point of view, when analyzing various operating parameters of a power system, it is important to determine low-frequency oscillations (hereinafter LFO). The emergence of the LFO with parameters exceeding a certain level, can lead to violation of parallel operation of power plants and power systems, violation of stability and a danger to equipment. Thus, interzone LFO can cause significant power fluctuations on extended power transmission lines, which in unfavorable circumstances lead to a loss of fluctuation stability and the separation of power systems into isolated working parts. Compelled LFO can lead to increased wear of power equipment, as well as cause damage to it.In the environment of MATLAB the algorithm of calculation of the LFO parameters of the different signals arriving from different PMU is received and further visualization of the received results for the purpose of increase in informational content of data view is carried out.This study provides an opportunity to process measurements and show the parameters of damped sinusoidal LFO, which are currently present in the signal. In the developed program, it is possible to manually set parameters for signal analysis: selecting a station with an installed PMU, processing window width of a given signal, respectively the minimum frequency observed in the LFO, cut coefficient, etc. with damping of LFO existing in regime parameters of the power system.