Hybrid Differential Evolution and Harmony Search for Optimal Power Flow
- Corresponding Author:
- Ngoc Dieu Vo
Department of Power Systems
Ho Chi Minh City University of Technology
Ho Chi Minh City, Vietnam
E-mail: [email protected]
Received date: January 20, 2015; Accepted date: January 31, 2015; Published date: February 07, 2015
Citation: Le DL, Ho DL, Vo ND (2015) Hybrid Differential Evolution and Harmony Search for Optimal Power Flow. Global J Technol Optim 6:175. doi: 10.4172/2229-8711.1000175
Copyright: © 2015 Le DL, et al. This is an open-access article distributed undermthe terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
In this paper, we presents a novel approach for solving optimal power flow (OPF) problems using a hybrid differential evolution and harmony search (DEHS). The DEHS method is an improved differential evolution method based on the harmony search scheme. Harmony Search has strong and easy to combine with other methods in optimization and the Differential Evolution algorithm has a very great ability to search solutions with a fast speed to converge, contrary to the most meta-heuristic algorithms. The DEHS method has the flexible adjustment of the parameters to get a better optimal solution. Moreover, an effective constraint handling framework in the method is employed for properly handling equality and inequality constraints of the problem. The proposed DEHS has been tested on three systems including IEEE-30 bus system with quadratic fuel cost function, IEEE-30 bus system with valve point effects fuel cost function and IEEE-57 bus system with quadratic fuel cost function. The obtained results from DEHS algorithm have been compared to those from other methods in the literature. The result comparison has indicated that the proposed DEHS method is more effective than many other methods for obtaining the optimal solution for the test systems. Therefore, the proposed DEHS is a very favorable method for solving the optimal power flow problems.