Gravitational search algorithm for the static synchronous series compensator based damping controller design

This paper demonstrated an efficient approach for designing a static synchronous series compensator (SSSC)based supplementary controllers for damping low frequency oscillations. The SSSC is mainly GTO based which can control different parameters of power system. A supplementary damping controller for a SSSC is designed for power system dynamic performance enhancement. The lead-lag structure of damping controller is used for the damping of power system oscillation. The proposed controllers design problem is formulated as an optimization problem. The Gravitational Search Algorithm (GSA) is employed to optimize the damping controller parameters. To demonstrate the effectiveness of the proposed adaptive SSSC based supplementary damping controller, computer simulations are performed on a power system considering a single machine infinite bus installed with SSSC. The Simulation results are presented and these results are compared with a conventional method of tuning the damping controller parameters. This will analyze the effectiveness and robustness of the proposed design approach.