A New Particle Swarm Optimization Solution to Nonconvex Economic Dispatch Problems

• Published in: IEEE transactions on power systems Vol. 22; no. 1; pp. 42 - 51
• Main Authors: Selvakumar, A.I., Thanushkodi, K.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.02.2007; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Artificial intelligence; Dynamic programming; Economic dispatch (ED); Economics; Fuel economy; Genetic algorithms; Inertial; local search; nonconvex solution space; Optimization; Particle swarm optimization; particle swarm optimization (PSO); Power generation; Power generation economics; Power systems; Resultants; Searching; Solution space; Space exploration; System testing
• ISSN: 0885-8950; 1558-0679
• DOI: 10.1109/TPWRS.2006.889132

This paper proposes a new version of the classical particle swarm optimization (PSO), namely, new PSO (NPSO), to solve nonconvex economic dispatch problems. In the classical PSO, the movement of a particle is governed by three behaviors, namely, inertial, cognitive, and social. The cognitive behavior helps the particle to remember its previously visited best position. This paper proposes a split-up in the cognitive behavior. That is, the particle is made to remember its worst position also. This modification helps to explore the search space very effectively. In order to well exploit the promising solution region, a simple local random search (LRS) procedure is integrated with NPSO. The resultant NPSO-LRS algorithm is very effective in solving the nonconvex economic dispatch problems. To validate the proposed NPSO-LRS method, it is applied to three test systems having nonconvex solution spaces, and better results are obtained when compared with previous approaches