Dolphin Echolocation and Fractional Order PID-Based STATCOM for Transient Stability Enhancement

Abstract

This paper investigates the application of fractional order PID (FOPID) controller to study and analyze transient stability in a single machine infinite bus (SMIB) system. For enhancement of transient stability and damping of low-frequency oscillations in a SMIB system, a shunt FACTS controller called static synchronous compensator (STATCOM) has been incorporated. In this paper, emphasis was given to the function of FOPID-based STATCOM controller for stability analysis in a SMIB system. A new heuristic optimization technique called dolphin echolocation (DE) was proposed for selecting optimal stabilizer parameters. A comparison based on nonlinear simulations was done between conventional PID controller and FOPID controller with small change in load and system parameters. Simulation results clearly signify the superiority of the proposed DE-based optimization technique.