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Open AccessFeature PaperArticle

Power Management Strategy for an Autonomous DC Microgrid

1
Global Energy Interconnection Development and Cooperation Organization, No. 8 Xuanwumennei Street, Xicheng District, Beijing 100000, China
2
AVENUES EA 7284, Sorbonne University, Université de Technologie de Compiègne, rue du Dr Schweitzer CS 60319, 60203 Compiègne, France
*
Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(11), 2202; https://doi.org/10.3390/app8112202
Received: 11 October 2018 / Revised: 31 October 2018 / Accepted: 6 November 2018 / Published: 9 November 2018
(This article belongs to the Special Issue Intelligent Energy Management of Electrical Power Systems)
Owing to the intermittent nature of renewable energy, microgrids in islanding operation mode require backup power sources. The diesel generator is the most popular backup source, but does not offer an instantaneous start-up and cannot immediately provide the necessary power. Therefore, supercapacitors are used to assist the power balance during diesel generator start-up thanks to their responsiveness and high-power density. This paper proposed a power management strategy for an autonomous DC microgrid based on a photovoltaic source, electrochemical storage, a supercapacitor, and a diesel generator. The proposed control system aimed at power balance while accounting for the slow start-up characteristic of the diesel generator, the self-discharge of the supercapacitor, the dynamic load management, and the economic operating mode of the diesel generator. The main contribution of this paper centered on a power management strategy solving the above issues integrally, and economic analysis for the diesel generator and microgrid. Experimental studies were carried out for different scenarios and the results obtained confirmed the effectiveness of the proposed strategy. Furthermore, the study provided a comparison between the economic operating and load-following modes of the diesel generator and demonstrated that the economic operating mode of the diesel generator can reduce the total energy cost of the DC microgrid. View Full-Text
Keywords: DC microgrid; power management strategy; diesel generator; supercapacitor; power balance; energy cost DC microgrid; power management strategy; diesel generator; supercapacitor; power balance; energy cost
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MDPI and ACS Style

Yin, C.; Wu, H.; Sechilariu, M.; Locment, F. Power Management Strategy for an Autonomous DC Microgrid. Appl. Sci. 2018, 8, 2202. https://doi.org/10.3390/app8112202

AMA Style

Yin C, Wu H, Sechilariu M, Locment F. Power Management Strategy for an Autonomous DC Microgrid. Applied Sciences. 2018; 8(11):2202. https://doi.org/10.3390/app8112202

Chicago/Turabian Style

Yin, Changjie; Wu, Hongwei; Sechilariu, Manuela; Locment, Fabrice. 2018. "Power Management Strategy for an Autonomous DC Microgrid" Appl. Sci. 8, no. 11: 2202. https://doi.org/10.3390/app8112202

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