Improved tunicate swarm algorithm: Solving the dynamic economic emission dispatch problems.

This study proposes improved tunicate swarm algorithm (ITSA) for solving and optimizing the dynamic economic emission dispatch (DEED) problem. The DEED optimization target is to reduce the fuel cost and pollutant emission of the power system. In addition, DEED is a complex optimization problem and contains multiple optimization goals. To strengthen the ability of the ITSA algorithm for solving DEED, the tent mapping is employed to generate initial population for improving the directionality in the optimization process. Meanwhile, the gray wolf optimizer is used to generate the global search vector for improving global exploration ability, and the Levy flight is introduced to expand the search range. Three test systems containing 5, 10 and 15 generator units are employed to verify the solving performance of ITSA. The test results show that the ITSA algorithm can provide a competitive scheduling plan for test systems containing different units. ITSA proposed algorithm gives the optimal economic and environmental dynamic dispatch scheme for achieving more precise dispatch strategy. [Display omitted] • This study proposes ITSA to solve the dynamic economic emission dispatch problem in power system. • The Tent mapping is used to generate initial population for improving the ITSA directionality in the optimization process. • The gray wolf optimizer is used to generate the global search vector for improving global ITSA optimization ability. • The Levy flight is introduced to expand the ITSA search range. • The results show that the ITSA has better optimization ability and stability. [ABSTRACT FROM AUTHOR]