Authors: Archana Gupta, Shashwati Ray
Addresses: Department of Electrical Engineering, Bhilai Institute of Technology, Durg, Chhattisgarh, India. ' Department of Electrical Engineering, Bhilai Institute of Technology, Durg, Chhattisgarh, India
Abstract: In this paper we propose an Interval based Differential Evolution (IDE) algorithm, an improved version of Differential Evolution (DE) algorithm using interval arithmetic. After estimating the global minimum roughly, the IDE algorithm constructs a mechanism which updates the upper bound of global minimum at each generation and defines an efficient termination criterion. Also at each generation it modifies the new population using the subset of current population and thus reduces the computational effort. We apply the proposed algorithm to the Combined Economic Emission Load Dispatch (CEELD) problem which obtains the optimal amount of generated power for the thermal generating units in the system by simultaneously minimising the fuel and emission costs. We find the proposed algorithm to be more efficient than the conventional DE when applied to IEEE 6 generators system. We also find that these results using the IDE algorithm are better than some recently reported evolutionary algorithms.
Keywords: differential evolution; interval arithmetic; shrinking box; fuel costs; emission costs; price penalty factor; thermal generating units; power generation; economic emission load dispatch.
International Journal of Reliability and Safety, 2011 Vol.5 No.3/4, pp.270 - 284
Received: 13 Jul 2010
Accepted: 24 Jan 2011
Published online: 11 Jul 2011 *