Optimal Design of UPFC Output Feed Back Controller for Power System Stability Enhancement by Hybrid PSO and GSA

Abstract

In this paper, the optimal design of supplementary controller parameters of a unified power
flow controller(UPFC) for damping low-frequency oscillations in a weakly connected system
is investigated. The individual design of the UPFC controller, using hybrid particle swarm
optimization and gravitational search algorithm (PSOGSA)technique under 3 loading
operating conditions, is discussed. The effectiveness of proposed controller on enhancing
dynamic stability is tested through eigenvalue analysis and time domain simulation. Also
nonlinear and electrical simulation results show the validity and effectiveness of the
proposed control schemes over a wide range of loading conditions. It is also observed that the
proposed UPFC-based damping stabilizers greatly enhance the power system transient
stability. Also, simulation results of coordinated design of stabilizer based on δE and mB is
presented and discussed,the system performance analysis under different operating conditions
show that the δE-based controller is superior to the mB-based controller.

Keywords


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