The meta-heuristic methods are very efficient for the search of global solution for complex problems better than deterministic methods. In this work, WC applied a novel meta-heuristic with Harmony search algorithm, this technique is used on a power network, in which renewable energy was injected. To validate the robustness of the proposed approach, the proposed algorithm is tested on the norm IEEE 30-bus, with three cases, minimization of fuel cost, emission of gaz and integration of renewable energy into the electrical network. Comparison of the results with recent global optimization methods show the superiority of the proposed approach and confirm its potential for solving practical optimal power flow in terms of solution quality and convergence characteristics. (C) 2014 Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/). Selection and peer-review under responsibility of the Euro-Mediterranean Institute for Sustainable Development (EUMISD)