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POWER SYSTEM STABILITY ENHANCEMENT USING A NSPSO DESIGNED UPFC DAMPING CONTROLLER

In this paper, a control technique based on simultaneous regulation of all control coefficients for Unified Power Flow Controller (UPFC) and Power System Stabilizer (PSS) is proposed. Non-Dominated Sorting Particle Swarm Optimization (NSPSO) has been used for parameter optimization. Studies in time and frequency domains for single machine infinite bus power system (SMIB) in different operational conditions are performed. In the control system, local state variables are choose as inputs to control blocks and simultaneous regulation of control parameters established out through NSPSO algorithm led to appealing results and some advantages over the control systems used formerly in similar settings. Different scenarios are simulated in this learn and compared to the proposed control system using the characteristics of the objective function in time domain and the position of system poles in frequency domain. The efficiency of the proposed system is established under different conditions for disturbance and variations of loads in the simulation.