Modified Particle Swarm Optimization Based Optimal Power Flow.

This paper describes a modified Particle Swarm Optimization (PSO) method called Fitness Distance Ratio (FDR) PSO to solve the Optimal Power Flow (OPF) problem with ramp rate limits of the generators. To avoid premature convergence of the conventional PSO, a velocity updation has been carried out to improve its convergence performance. The proposed method is tested on 5-unit, 10-bus test system and 39 bus New England system. To validate the effectiveness of the proposed method, the OPF results are compared with other optimization methods. Transient stability limit of the generators are also incorporated in the formulation of OPF problem. Wheeling transactions and contingency analysis are also carried out on the New England test system and the system stability is checked. A 24-hour load curve is considered for the same system and transient stability constrained OPF solution is obtained through FDR PSO method and the results are presented. [ABSTRACT FROM AUTHOR]