Abstract
This paper investigates the consequences of integration of solar PV and wind power generation on the small signal stability of power system. Standard benchmark IEEE 14 bus system is selected for study. Impact has been analyzed by substituting the conventional synchronous generator with Solar Photo-Voltaic Generation (SPVG) and Doubly Fed Induction Generator (DFIG) wind turbines separately as well as jointly. The effect of varying penetration level of solar and wind power is also investigated. Eigenvalue analysis is used to compute the frequency and damping factor of oscillatory components that arise due to small disturbances. The oscillatory modes are also identified using discrete wavelet transform, a spectral analysis technique. Power spectral density and time frequency curves are used to extract hidden frequency information from the signal. The different cases have been simulated in MATLAB based PSAT, wavelet, and time frequency signal analysis toolboxes.
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