A real-time nonlinear method for a single hydropower plant unit commitment based on analytical results of dual decomposition optimization

Douglas A.G. Vieira, Emerson E. Costa, Pedro H.F. Campos, Matheus O. Mendonça and Gustavo R.L. Silva

Renewable Energy, 2022, vol. 192, issue C, 513-525

Abstract: This paper provides a novel computationally efficient nonlinear method for solving the unit commitment of turbines for a single hydropower plant. A closed-form solution was derived for the number of generating units and the power allocated to each one based on a dual decomposition optimization approach. The objective is to maximize the generated energy for a given water discharge, water net head, and discharge limits, considering the generating units' nonlinear efficiency curves and the prohibited and discontinuous operating zones. Numerical experiments in real-world plants are presented, and they show the effectiveness of the proposed approach, generating considerably higher energy for the same amount of water discharge. It is also compared with a Mixed Integer Linear Programming (MILP) approach, providing a speed-up of 1000 times. The formulation presented in this paper is part of a commercial software module that is currently applied to the operational planning of 18 hydropower plants, including Belo Monte's power plant, which has 24 generating units.

Keywords: Unit commitment problem; Dual decomposition; Optimization methods; Hydropower plant (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:192:y:2022:i:c:p:513-525

DOI: 10.1016/j.renene.2022.04.080

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