Abstract
This paper presents the Proportional Derivative based fuzzy PI type Static Series Synchronous Compensator (SSSC) and PSS for improving transient stability in power systems in a wide range of operating points. The three phase disturbance at various locations and various constraints are considered for system performance analysis. The positive damping torques produced by this proposed controller improves the steady state error of electromagnetic oscillations very effectively as compared with lead-lag (LL) type SSSC and PSS compensator. A three by three fuzzy logic control rule has been employed in the proposed controller adjusting the controller parameters during unpredictable disturbances in power systems. The input to the controller is generator speed deviation. Modified Sine Cosine Algorithm (mSCA) is used for optimizing problem for controller parameters. The whole work is carried out under MATLAB environment platform.
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