Hierarchical Control for Multiple DC-Microgrids Clusters
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This paper presents a distributed hierarchical control framework to ensure reliable operation of dc microgrid (MG) clusters and an adaptive droop method is proposed for this level, which determines droop coefficients according to the state-of-charge of batteries automatically.Abstract:
This paper presents a distributed hierarchical control framework to ensure reliable operation of dc microgrid (MG) clusters. In this hierarchy, primary control is used to regulate the common bus voltage inside each MG locally. An adaptive droop method is proposed for this level, which determines droop coefficients according to the state-of-charge (SOC) of batteries automatically. A small-signal model is developed to investigate effects of the system parameters, constant power loads, as well as line impedance between the MGs on stability of these systems. In the secondary level, a distributed consensus-based voltage regulator is introduced to eliminate the average voltage deviation over the MGs. This distributed averaging method allows the power flow control between the MGs to be achieved at the same time, as it can be accomplished only at the cost of having voltage deviation inside the system. Another distributed policy is employed then to regulate the power flow among the MGs according to their local SOCs. The proposed distributed controllers on each MG communicate with only the neighbor MGs through a communication infrastructure. Finally, the developed small-signal model is expanded for MG clusters with all the proposed control loops. The effectiveness of the proposed hierarchical scheme is verified through detailed hardware-in-the-loop simulations.read more
Citations
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Journal ArticleDOI
DC Microgrids—Part I: A Review of Control Strategies and Stabilization Techniques
TL;DR: In this paper, a review of control strategies, stability analysis, and stabilization techniques for dc microgrids is presented, where overall control is systematically classified into local and coordinated control levels according to respective functionalities in each level.
Journal ArticleDOI
DC Microgrids—Part II: A Review of Power Architectures, Applications, and Standardization Issues
TL;DR: In this article, an overview of the state of the art in dc microgrid protection and grounding is provided, which discusses both design of practical protective devices and their integration into overall protection systems.
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Review on Control of DC Microgrids and Multiple Microgrid Clusters
Lexuan Meng,Qobad Shafiee,Giancarlo Ferrari Trecate,Houshang Karimi,Deepak Fulwani,Xiaonan Lu,Josep M. Guerrero +6 more
TL;DR: In this paper, an extensive review on control schemes and architectures applied to dc microgrids (MGs) is presented, covering multilayer hierarchical control schemes, coordinated control strategies, plug-and-play operations, stability and active damping aspects, as well as nonlinear control algorithms.
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Distributed Control of Battery Energy Storage Systems for Voltage Regulation in Distribution Networks With High PV Penetration
TL;DR: A coordinated control strategy is proposed to regulate the charge/discharge of BESs using a combination of the local droop-based control method and a distributed control scheme which ensures the voltages of feeder remain within allowed limits.
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An Improved Distributed Secondary Control Method for DC Microgrids With Enhanced Dynamic Current Sharing Performance
TL;DR: In this paper, an improved distributed secondary control scheme for dc microgrids is proposed, which can remove the dc voltage deviation and improve the current sharing accuracy by using voltage-shifting and slope-adjusting approaches simultaneously.
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Advanced Control Architectures for Intelligent Microgrids—Part I: Decentralized and Hierarchical Control
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