Journal ArticleDOI
Hierarchical control of droop-controlled DC and AC microgrids — a general approach towards standardization
Josep M. Guerrero,Juan C. Vasquez,Jose Matas,L.G. de Vicuna,Miguel Castilla +4 more
- Vol. 58, Iss: 1, pp 158-172
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TLDR
The hierarchical control derived from ISA-95 and electrical dispatching standards to endow smartness and flexibility to MGs is presented and results are provided to show the feasibility of the proposed approach.Abstract:
DC and AC Microgrids are key elements to integrate renewable and distributed energy resources as well as distributed energy storage systems. In the last years, efforts toward the standardization of these Microgrids have been made. In this sense, this paper present the hierarchical control derived from ISA-95 and electrical dispatching standards to endow smartness and flexibility to microgrids. The hierarchical control proposed consist of three levels: i) the primary control is based on the droop method, including an output impedance virtual loop; ii) the secondary control allows restoring the deviations produced by the primary control; and iii) the tertiary control manage the power flow between the microgrid and the external electrical distribution system. Results from a hierarchical-controlled microgrid are provided to show the feasibility of the proposed approach.read more
Citations
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Journal ArticleDOI
Toward Future Green Maritime Transportation: An Overview of Seaport Microgrids and All-Electric Ships
TL;DR: This overview study emphasizes the characteristic of seaport microgrid and AESs, then several emerging technical challenges and the future research prospects are raised after a comprehensive literature survey.
Journal ArticleDOI
Mitigation of Harmonics in Grid-Connected and Islanded Microgrids Via Virtual Admittances and Impedances
TL;DR: A capacitive virtual impedance loop was implemented to improve the harmonic current sharing and attenuate the voltage harmonics at the PCC during islanded operation of the microgrid.
Journal ArticleDOI
Networked Microgrids for Grid Resilience, Robustness, and Efficiency: A Review
TL;DR: This paper review and summarize the state-of-the-art methodologies for operation and control of NMGs, and introduces the opportunities, challenges, and possible solutions regarding N MGs for improving grid resilience, robustness, and efficiency.
Journal ArticleDOI
Autonomous Operation of a Hybrid AC/DC Microgrid With Multiple Interlinking Converters
TL;DR: An autonomous power sharing approach for hybrid microgrids interconnected through multiple ICs by introducing a superimposed frequency in the dc subgrid is proposed and the outcomes are proportional power sharing, preventing circulating power and overstressing the ICs as well as acceptable dc voltage regulation.
Journal ArticleDOI
On the Convergence of Newton's Method in Power Flow Studies for DC Microgrids
TL;DR: This paper presents sufficient conditions for the quadratic convergence of the Newton's method in this type of grids with constant power terminals and computational results complement this theoretical analysis.
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