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
A New Droop Coefficient Design Method for Accurate Power-Sharing in VSC-MTDC Systems
TL;DR: The proposeddroop coefficient design method works by adjusting the droop coefficient and can realize an arbitrary power-sharing ratio among all the converters in an MTDC system, which has the potential for higher reliability than the alternative methods.
Journal ArticleDOI
A Decentralized SOC Balancing Method for Cascaded-Type Energy Storage Systems
TL;DR: A decentralized SOC balancing method is proposed to balance the SOC of cascaded-type energy storage systems since the method does not rely on any communication, it possesses higher reliability.
Journal ArticleDOI
Improved Current Sharing Techniques for DC Microgrids
TL;DR: Two improved techniques for current sharing in DC microgrids are presented and the harmony search technique is utilized to attain the optimal droop resistances which results in minimizing the error in the current sharing.
Journal ArticleDOI
A Distributed Control Method Based on a Voltage Sensitivity Matrix in DC Microgrids With Low-Speed Communication
TL;DR: A distributed control method using a voltage sensitivity matrix is proposed to improve the power sharing performance of bidirectional distributed generators (BDGs) and the voltage regulation performance of a dc bus in a dc microgrid (MG).
Journal ArticleDOI
Advances and opportunities in the model predictive control of microgrids: Part I–primary layer
Zhenbin Zhang,Zhenbin Zhang,Oluleke Babayomi,Tomislav Dragicevic,Rasool Heydari,Cristian Garcia,Jose Rodriguez,Ralph Kennel +7 more
TL;DR: A survey of the recent advances in MPC-based converters in Microgrids, presenting opportunities for the MPC converter control of autonomous MGs, and transportation electrification.
References
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Control of parallel connected inverters in stand-alone AC supply systems
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
TL;DR: This paper deals with the design of the output impedance of uninterruptible power system (UPS) inverters with parallel-connection capability, and proposes novel control loops to achieve both stable output impedance and proper power balance.