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Abstract

In this paper design of integrated static synchronous series capacitor (SSSC) and variable structure system observer (VSSO) based optimal controller for damping of frequency oscillations in Multi Area Power System (MAPS) under deregulated environment is presented. A Thermal-Thermal power system is considered for simulation study. SSSC is a series connecting device which is connected with tie line of the system. The low frequency oscillations of system are minimized by designing the gain of SSSC. The high frequency oscillations are minimized by designing observer based optimal controller. The design of VSSO matrix is a function of transformed System matrix obtained from optimal sliding mode control law. The performance of deregulated system with integrated control strategy (SSSC+ VSSO based Controller) is tested and simulation results are presented and compared to Neuro Fuzzy Sliding Mode Controller (NFSMC) and PI controller.