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Energies 2018, 11(3), 540; https://doi.org/10.3390/en11030540

Modified Differential Evolution Algorithm: A Novel Approach to Optimize the Operation of Hydrothermal Power Systems while Considering the Different Constraints and Valve Point Loading Effects

1
Power System Optimization Research Group, Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam
2
Department of Electrical Engineering, Lac Hong University, Bien Hoa 810000, Vietnam
3
Department of Electrical Engineering, The University of Da Nang—University of Science and Technology, Danang 550000, Vietnam
4
Institute of Research and Development, Duy Tan University, Danang 550000, Vietnam
5
Office of Science Research and Development, Lac Hong University, Bien Hoa 810000, Vietnam
*
Author to whom correspondence should be addressed.
Received: 1 January 2018 / Revised: 23 February 2018 / Accepted: 24 February 2018 / Published: 2 March 2018
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Abstract

This paper proposes an efficient and new modified differential evolution algorithm (ENMDE) for solving two short-term hydrothermal scheduling (STHTS) problems. The first is to take the available water constraint into account, and the second is to consider the reservoir volume constraints. The proposed method in this paper is a new, improved version of the conventional differential evolution (CDE) method to enhance solution quality and shorten the maximum number of iterations based on two new modifications. The first focuses on a self-tuned mutation operation to open the local search zone based on the evaluation of the quality of the solution, while the second focuses on a leading group selection technique to keep a set of dominant solutions. The contribution of each modification to the superiority of the proposed method over CDE is also investigated by implementing CDE with the self-tuned mutation (STMDE), CDE with the leading group selection technique (LGSDE), and CDE with the two modifications. In addition, particle swarm optimization (PSO), the bat algorithm (BA), and the flower pollination algorithm (FPA) methods are also implemented through four study cases for the first problem, and two study cases for the second problem. Through extensive numerical study cases, the effectiveness of the proposed approach is confirmed. View Full-Text
Keywords: self-tuned mutation; leading group selection; available water constraints; non-convex objective; reservoir volume constraints self-tuned mutation; leading group selection; available water constraints; non-convex objective; reservoir volume constraints
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Nguyen, T.T.; Vu Quynh, N.; Duong, M.Q.; Van Dai, L. Modified Differential Evolution Algorithm: A Novel Approach to Optimize the Operation of Hydrothermal Power Systems while Considering the Different Constraints and Valve Point Loading Effects. Energies 2018, 11, 540.

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