Identification Of Low Frequency Oscillations Using Synchrophasor Measurements
DOI:
https://doi.org/10.20535/1810-0546.2014.5.34781Keywords:
Low frequency oscillations, Wide Area Measuring System, Spectral analysis, Modal analysis, DampingAbstract
The actual questions of the study of low-frequency oscillations of power in the interconnected power system (IPS) of Ukraine in terms of introduction of modern Wide Area Measuring System (WAMS) are considered. The algorithm for identifying modes of oscillations by means of using recordings from the Phasor Measurement Units of a WAMS using spectral analysis and calculation of the main characteristics of identified fluctuations is developed. Reliability and adequacy of the algorithm is tested by comparing the results of calculations with traditional calculations of modal analysis of power system in DigSilent Power Factory. Several WAMS recordings in case of significant disturbances in the mainline power grids IPS of Ukraine were analyzed using an offered algorithm and results of analysis of frequency oscillations basic properties are presented. The level of danger of identified fluctuations in terms of under-damping of identified oscillations and a possible violation of the vibrational stability of the power system for the case of a cascade failure of Uglegorskaya TPP is clearly reflected in the article.
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