31SOLUTION TO COMBINED HEAT AND POWER ECONOMIC DISPATCH PROBLEM BY BIOGEOGRAPHY-BASED OPTIMIZATIONIn this paper a new approach for the solution of the Combined Heat and Power Economic Dispatch problem (CHPED) is being presented using Biogeography-Based Optimization (BBO). Biogeography-Based Optimization (BBO) is a type of evolutionary algorithm which is based on the theory of biogeography and is inspired from the two concepts-migration of species between “islands” via flotsam, wind, flying, swimming, etc. and mutation. The proposed test system takes into account seven units and also a comparison with Artificial Bee Colony Algorithm (ABC) is being made. From the results it is seen that BBO provides best solution than ABC.idsoubache@gmail.comReview322013Artificial Bee Colony Algorithm (ABC),Biogeography-Based Optimization (BBO),Combined Heat and Power Economic Dispatch Problem (CHPED),CogenerationI.D.Soubache,P. Sudhakara Reddy Research scholar, Department of Electrical & Electronics Engineering, PRIST University, Vallam, Thanjavur, Tamilnadu, India.,Associate Professor, Department of Electronics and Communication Engineering, Sri Kalahasteeswara Institute of Technology, Srikalahasti, Chittoor District, Andhra Pradesh, India