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Energies 2018, 11(1), 129; https://doi.org/10.3390/en11010129

Control and EMS of a Grid-Connected Microgrid with Economical Analysis

1
Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON L1H7K4, Canada
2
Electrical Engineering Department, Faculty of Engineering, Assiut University, Assiut 71515, Egypt
3
Faculty of Energy Systems and Nuclear Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON L1H7K4, Canada
*
Author to whom correspondence should be addressed.
Received: 24 November 2017 / Revised: 29 December 2017 / Accepted: 3 January 2018 / Published: 5 January 2018
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Abstract

Recently, significant development has occurred in the field of microgrid and renewable energy systems (RESs). Integrating microgrids and renewable energy sources facilitates a sustainable energy future. This paper proposes a control algorithm and an optimal energy management system (EMS) for a grid-connected microgrid to minimize its operating cost. The microgrid includes photovoltaic (PV), wind turbine (WT), and energy storage systems (ESS). The interior search algorithm (ISA) optimization technique determines the optimal hour-by-hour scheduling for the microgrid system, while it meets the required load demand based on 24-h ahead forecast data. The control system consists of three stages: EMS, supervisory control and local control. EMS is responsible for providing the control system with the optimum day-ahead scheduling power flow between the microgrid (MG) sources, batteries, loads and the main grid based on an economic analysis. The supervisory control stage is responsible for compensating the mismatch between the scheduled power and the real microgrid power. In addition, this paper presents the local control design to regulate the local power, current and DC voltage of the microgrid. For verification, the proposed model was applied on a real case study in Oshawa (Ontario, Canada) with various load conditions. View Full-Text
Keywords: microgrid (MG); energy management system (EMS); interior search algorithm (ISA); supervisory control; local control microgrid (MG); energy management system (EMS); interior search algorithm (ISA); supervisory control; local control
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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El-Hendawi, M.; Gabbar, H.A.; El-Saady, G.; Ibrahim, E.-N.A. Control and EMS of a Grid-Connected Microgrid with Economical Analysis. Energies 2018, 11, 129.

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