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
Arctan Power–Frequency Droop for Improved Microgrid Stability
TL;DR: In this paper, the arctan function was used to improve the small signal stability of a two-inverter microgrid. But, the use of this arcta function is not suitable for power-frequency droop.
Journal ArticleDOI
Automatic Power-Sharing Modification of $P$ / $V$ Droop Controllers in Low-Voltage Resistive Microgrids
TL;DR: In this paper, the authors investigated whether the grid voltage is actually a disadvantage of the active power/voltage (P/V) droop controllers and showed that with P/V droop control, the DG units that are located electrically far from the load centers automatically deliver a lower share of the power.
Journal ArticleDOI
Power Calculation Using RBF Neural Networks to Improve Power Sharing of Hierarchical Control Scheme in Multi-DER Microgrids
TL;DR: In this article, a decentralized droop-based control scheme for distributed energy resources (DERs) in the microgrid is presented. But unlike the previous research that is limited to the primary and secondary control levels, this method includes detailed modeling for three hierarchical control levels for either grid-connected or autonomous modes.
Journal ArticleDOI
An Improved Voltage Compensation Approach in a Droop-Controlled DC Power System for the More Electric Aircraft
TL;DR: In this article, an improved voltage regulation method in a multisource-based dc electrical power system in the more electric aircraft is proposed, which can be used in terrestrial dc microgrids as well, effectively improves the load sharing accuracy under high droop gain circumstance with consideration of cable impedance.
Journal ArticleDOI
Review of hierarchical control in DC microgrids
TL;DR: In this article, the load sharing mechanisms employed in primary control are distinguished in passive methods and active methods, and different methods for secondary control are also categorized, their key points and their limitations together with solutions that have been proposed by the research community are presented and critically assessed.
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TL;DR: In this article, a control scheme for parallel-connected inverters in a standalone AC supply system is presented, which uses feedback of only those variables that can be measured locally at the inverter and does not need communication of control signals between the inverters.
Journal ArticleDOI
Output impedance design of parallel-connected UPS inverters with wireless load-sharing control
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