Solution of Economic Load Dispatch Problem using Gravitational Search Algorithm with Valve Point Loading

This paper describes gravitational search algorithm for solving the non convex Economic load Dispatch (ELD) problem with valve point effect. The main objective of economic load dispatch problem is to generate the required amount of power so that the total operating cost of system is minimized, while satisfying load demand and system equality and inequality Constraints. Different heuristic optimization methods have been proposed to solve this problem in previous study. So in this paper, gravitational search algorithm (GSA) based on law of gravity and mass interaction is proposed. This proposed approach has been tested on 3, 13, 40 unit systems. Simulation results of proposed approach are compared with some well-known heuristic search methods. The obtained results verify the efficiency of the proposed method with minimum computational time in solving various nonlinear functions. Keyword : economic load dispatch, gravitational search algorithm, valve point effect.