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
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Journal ArticleDOI
Autonomous Control of Interlinking Converter With Energy Storage in Hybrid AC–DC Microgrid
TL;DR: In this paper, an appropriate control scheme is developed for controlling the interlinking converter to keep the hybrid microgrid in autonomous operation with active power proportionally shared among its distributed sources.
Journal ArticleDOI
Autonomous Voltage Unbalance Compensation in an Islanded Droop-Controlled Microgrid
TL;DR: A stationary-frame control method for voltage unbalance compensation in an islanded microgrid is proposed, based on the proper control of DGs interface converters, which demonstrates the effectiveness of the proposed method in the compensation of voltage un balance.
Journal ArticleDOI
Impact of Communication Delays on Secondary Frequency Control in an Islanded Microgrid
TL;DR: Results from the Canadian urban distribution system have verified that communication delays can adversely affect the micro grid secondary frequency control, and the proposed gain scheduling approach can improve the robustness of the microgrid secondary frequency controller to communication delays.
Journal ArticleDOI
Distributed Power System Virtual Inertia Implemented by Grid-Connected Power Converters
TL;DR: The concept of distributed power system virtual inertia, which can be implemented by grid-connected power converters, is proposed and validated through simulation and experimental results, which indicate that 12.5% and 50% improvements of the frequency nadir and rate of change of frequency can be achieved.
Journal ArticleDOI
Robust Frequency Control in an Islanded Microgrid: ${H} _{\infty }$ and $\mu $ -Synthesis Approaches
TL;DR: It is shown that the $ {\mu) -synthesis approach due to considering structured/parametric uncertainties provides better performance than the ${H} _{ {\infty }}$ control method.
References
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