Abstract
In this study, a FLPSS is proposed for attenuate the low frequency oscillations of a power network connected SOFC. At first this work studies the theory and modeling manner of SOFC into power network and its effect on small signal stability. The paper demonstrates the fundamental module, mathematical analysis and small signal modeling of the SOFC connected to a SMIB network. The basic contribution of the study is to attenuate the low frequency oscillations by optimal stabilizers in the presence of SOFC. To optimize the performance of the system, the FLPSS is exploited and designed by the HSS algorithm. In order for assessment of the performance of the proposed stabilizer, two different types of controllers include optimal conventional stabilizer and the proposed dynamic stabilizer based fuzzy logic controller are compared. To guarantee the effectiveness of the proposed optimal stabilizer, the simulation process takes in three scenarios of loading conditions. Results indicated the superiority of the proposed FLPSS over optimal classic PSS in the same operating conditions. The simulations are carried out using MATLAB software.
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