AN IMPROVED HARMONY SEARCH APPROACH TO ECONOMIC DISPATCH

In this paper an improved Harmony Search (HS) is applied to solve the Economic Dispatch (ED) problem with nonconvex cost functions. The proposed approach modifies the improvement of Novel Global Harmony Search (NGHS) reported in the literature where the resulting approach is known as NGHS-II. The practical ED problem have nonconvex cost functions with equality and inequality constraints that makes the problem of finding the global optimum difficult using any optimization approaches. In this paper, the NGHS-II is deal with the equality and inequality constraints in the ED problem. To validate the results obtained by proposed NGHS-II, NGHS and other improved version of harmony search (IHS) are applied for comparison. Also, the results obtained by the NGHS-II are compared with the previous approaches reported in the literature. The results show that the proposed NGHS-II produces better solutions for all study systems.