Joint Optimal Sizing and Operation of Unbalanced Three-Phase AC Microgrids Using HOMER Pro and Mixed-Integer Linear Programming

This paper presents a methodology for jointly optimizing the sizing and operation of AC microgrids. The methodology is applied to the CAMPUSGRID microgrid, which is currently being developed at the State University of Campinas (UNICAMP) in Brazil. The distributed energy resources (DERs) considered i...

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Bibliographic Details
Published in:Journal of control, automation & electrical systems automation & electrical systems, 2024-04, Vol.35 (2), p.346-360
Main Authors: Santos, Luiza Higino S., Silva, Jéssica Alice A., López, Juan Camilo, Rider, Marcos J., da Silva, Luiz C. P.
Format: Article
Language:English
Subjects:
Contingency
Control
Control and Systems Theory
Distributed generation
Electric power grids
Electrical Engineering
Energy management
Energy sources
Energy storage
Engineering
Gas generators
Integer programming
Linear programming
Mechatronics
Mixed integer
Optimization
Photovoltaic cells
Robotics
Robotics and Automation
Sizing
Tariffs
Unbalance
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Summary:This paper presents a methodology for jointly optimizing the sizing and operation of AC microgrids. The methodology is applied to the CAMPUSGRID microgrid, which is currently being developed at the State University of Campinas (UNICAMP) in Brazil. The distributed energy resources (DERs) considered in the study include a battery energy storage system (BESS), a dispatchable gas generator, and photovoltaic (PV) generation. The proposed energy management system (EMS) minimizes the costs associated with day-ahead operation of the DERs in an unbalanced three-phase AC microgrid. To develop the EMS as a mixed-integer linear programming (MILP) model, the MATLAB Link module of HOMER Pro and the AMPL API are used. Heuristic rules are also developed for contingency and post-contingency operations in case of unintentional disconnection from the main grid. The sizing simulations combine tariff regimes, contingencies, and dispatch strategies. The results demonstrate the influence of the tariff on the net present cost (NPC) and the importance of resilience in sizing DERs. Additionally, the proposed model is capable of assessing the impact of DERs on the electrical grid. Finally, the joint strategy proposed in this paper leads to a reduction in microgrid investment cost, improvement in voltage magnitude profile, and reduction in active power losses when compared to the default dispatch strategies of HOMER Pro.
ISSN:2195-3880
2195-3899
DOI:10.1007/s40313-023-01059-5