A ROBUST ABC BASED PSS DESIGN FOR A SMIB POWER SYSTEM

An Artificial Bee Colony (ABC) algorithm to optimal tune of the Power System Stabilizer (PSS) in a Single-Machine Infinite-Bus (SMIB) power system is proposed in this paper. In the ABC method the food foraging behavior, memorizing and information sharing characteristics of honey bee swarm is simulated to find the best possible solution within a reasonable computation time. The problem of robustly PSS design is formulated as an optimization problem according to the time domain-based objective function for a wide range of operating conditions and is solved by the ABC technique which is simple, robust and capable to solve difficult combinatorial optimization problems. The proposed ABC based PSS is tested on a SMIB power system through the nonlinear time domain simulation and some performance indices in comparison with the particle swarm optimization based tuned stabilizer and conventional PSS to illustrate its robust performance. Results evaluation show that the proposed stabilizer achieves good robust performance for wide range of system operation conditions and is superior to the other PSSs.