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Open AccessArticle

Comparative Study on Optimization Solvers for Implementation of a Two-Stage Economic Dispatch Strategy in a Microgrid Energy Management System

Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyungbuk 37673, Korea
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Energies 2020, 13(5), 1096; https://doi.org/10.3390/en13051096
Received: 23 January 2020 / Revised: 20 February 2020 / Accepted: 26 February 2020 / Published: 2 March 2020
(This article belongs to the Special Issue Planning and Operation of Distributed Energy Resources in Smart Grids)
A microgrid energy management system (MEMS) optimally schedules the operation of dispatchable distributed energy resources to minimize the operation costs of microgrids (MGs) via an economic dispatch (ED). Actual ED implementation in the MEMS relies on an optimization software package called an optimization solver. This paper presents a comparative study of optimization solvers to investigate their suitability for ED implementation in the MEMS. Four optimization solvers, including commercial as well as open-source-based ones, were compared in terms of their computational capability and optimization results for ED. Two-stage scheduling was applied for the ED strategy, whereby a mixed-integer programming problem was solved to yield the optimal operation schedule of battery-based energy storage systems. In the first stage, the optimal schedule is identified one day before the operating day; in the second stage, the optimal schedule is updated every 5 min during actual operation to compensate for operational uncertainties. A modularized programming strategy was also introduced to allow for a comparison between the optimization solvers and efficient writing of codes. Comparative simulation case studies were conducted on three test-bed MGs to evaluate the optimization results and computation times of the compared optimization solvers. View Full-Text
Keywords: microgrids (MGs); microgrid energy management system (MEMS); economic dispatch (ED); optimization solver; modeling package; energy storage systems (ESSs) microgrids (MGs); microgrid energy management system (MEMS); economic dispatch (ED); optimization solver; modeling package; energy storage systems (ESSs)
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Lee, G.-H.; Park, J.-Y.; Ham, S.-J.; Kim, Y.-J. Comparative Study on Optimization Solvers for Implementation of a Two-Stage Economic Dispatch Strategy in a Microgrid Energy Management System. Energies 2020, 13, 1096.

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