Table of Contents
Advances in Electrical Engineering
Volume 2014, Article ID 765053, 14 pages
Research Article

Performance of Various Metaheuristic Techniques for Economic Dispatch Problem with Valve Point Loading Effects and Multiple Fueling Options

1Faculty of Electrical Engineering, Hamdard University, Islamabad Campus, Islamabad 44000, Pakistan
2Department of Electrical Engineering, Bahria University, Islamabad Campus, Islamabad 44000, Pakistan

Received 16 July 2014; Revised 5 November 2014; Accepted 6 November 2014; Published 27 November 2014

Academic Editor: Mamun B. Ibne Reaz

Copyright © 2014 Ijaz Ahmed et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The paper presents the metaheuristic approaches based on pattern search and simulated annealing hybridized with sequential quadratic programming, a powerful nonlinear adaptive technique for estimation of the finest combination of generated power in a given system at lowest operating cost while sustaining the operating condition of system efficiently. The fuel cost is minimized by satisfying the nonlinear operating conditions of thermal units mainly based on generation capacity constraints, generator ramp limit, power balance constraints, and valve point loading effect and by keeping in view the prohibited operating zones, respectively. About the optimization, a comparative study is made for pattern search (PS) and simulated annealing (SA), as a viable global search technique and sequential quadratic programming, an efficient local optimizer and their hybrid versions. The applicability, stability, and reliability of the designed approaches are validated through comprehensive statistical analysis based on Monte Carlo simulations.