Genetic evolving ant direction HDE for OPF with non-smooth cost functions and statistical analysis

Authors:
K. Vaisakh;L. R. Srinivas
Affiliations:
Department of Electrical Engineering, AU College of Engineering, Andhra University, Visakhapatnam 530 003, AP, India;Department of Electrical and Electronics Engineering, S.R.K.R. Engineering College, Bhimavaram 534 204, AP, India
Venue:
Expert Systems with Applications: An International Journal
Year:
2011

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Abstract

This paper proposes an evolving ant direction hybrid differential evolution (EADHDE) algorithm for solving the optimal power flow problem with non-smooth and non-convex generator fuel cost characteristics. The EADHDE employs ant colony search to find a suitable mutation operator for hybrid differential evolution (HDE) where as the ant colony parameters are evolved using genetic algorithm approach. The Newton-Raphson method solves the power flow problem. The feasibility of the proposed approach was tested on IEEE 30-bus system with three different cost characteristics. Several cases were investigated to test and validate the robustness of the proposed method in finding optimal solution. Simulation results demonstrate that the EADHDE provides very remarkable results compared to classical HDE and other methods reported in the literature recently. An innovative statistical analysis based on central tendency measures and dispersion measures was carried out on the bus voltage profiles and voltage stability indices.