A Novel Power Scheduling Mechanism for Islanded DC Microgrid Cluster

Abdul Wahid, Javed Iqbal, Affaq Qamar, Salman Ahmed, Abdul Basit, Haider Ali and Omar M. Aldossary
Additional contact information
Abdul Wahid: Department of Electrical Engineering, Sarhad University of Science & IT, Peshawar 25000, Pakistan
Javed Iqbal: Department of Electrical Engineering, Sarhad University of Science & IT, Peshawar 25000, Pakistan
Affaq Qamar: US-Pakistan Center in Advanced Studies for Energy, University of Engineering and Technology, Peshawar 25000, Pakistan
Salman Ahmed: Department of Computer Systems Engineering, University of Engineering and Technology, Peshawar 25000, Pakistan
Abdul Basit: US-Pakistan Center in Advanced Studies for Energy, University of Engineering and Technology, Peshawar 25000, Pakistan
Haider Ali: Department of Electrical & Electronics Engineering Technology, University of Technology, Nowshera 24100, Pakistan
Omar M. Aldossary: Department of Physics and Astronomy, College of Science, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia

Sustainability, 2020, vol. 12, issue 17, 1-14

Abstract: Extension of the main grid to remote areas is economically not feasible. To electrify remote areas, one of the best choices is to install Renewable Energy Sources (RES) as a distributed generation (DG) and thus form a microgrid (MG) in islanded (Stand-alone) mode. In islanded mode, the MG has no support from the national grid. Thus, the overloading of islanded DC MG can collapse DC bus voltage and cause fluctuation in the load. Therefore, the power sharing and the interconnection among the microgrid (MG) cluster are necessary for reliable operation. Many methods for power sharing also aim at minimizing circulating currents which cannot be avoided when every MG feeds their load locally. Therefore, the proper power balancing among generation, loads, and in between MG cluster is challenging in islanded topology. This paper presents an intelligent controller for power sharing among PV-based MG clusters with load management of connected load during power deficiency. The priority is given to the local critical load of each MG. The second priority is given to the remaining load of the respective MG. The least priority is given to the loads connected to the neighboring MGs. The results show that the power continuation to the power-deficient load has been maintained when another MG has surplus power. The circulating current losses between the MG cluster has been fully avoided during no power sharing.

Keywords: power-sharing algorithm; DC microgrid; power sharing; power management (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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