An Improved Droop Control Strategy Based on Changeable Reference in Low-Voltage Microgrids

Dou, Chunxia; Zhang, Zhanqiang; Yue, Dong; Gao, Hanxiao

doi:10.3390/en10081080

Cited by 10 publications

(4 citation statements)

References 31 publications

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“…T and X[k + 1] are the vectors of the discovered variables of interest at k and k + 1 iterations, respectively, and D is an information weighted matrix. As discussed in [37], if the values of D's elements are non-negative and the sums of D's rows and columns are all ones, the convergence of all PV inverters to a consensus will be reached at the average value of the variables of interest which can be expressed as…”

Section: Coordination Control Layer: Consensus-based Distributed Controlmentioning

confidence: 99%

Adaptive coordination of sequential droop control for PV inverters to mitigate voltage rise in PV-Rich LV distribution networks

Mai

Haque

Vergara

et al. 2021

Electric Power Systems Research

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DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal.If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:

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Section: Coordination Control Layer: Consensus-based Distributed Controlmentioning

confidence: 99%

Adaptive coordination of sequential droop control for PV inverters to mitigate voltage rise in PV-Rich LV distribution networks

Mai

Haque

Vergara

et al. 2021

Electric Power Systems Research

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“…Leader-following consistency theory [27]: In a directed graph (or communication network), it is assumed that there are n agents, and the state of the i-th agent is marked as…”

Section: Conflicts Of Interestmentioning

confidence: 99%

A Novel Hierarchical Control Strategy for Low-Voltage Islanded Microgrids Based on the Concept of Cyber Physical System

et al. 2018

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Based on the concept of cyber physical system (CPS), a novel hierarchical control strategy for islanded microgrids is proposed in this paper. The control structure consists of physical and cyber layers. It’s used to improve the control effect on the output voltages and frequency by droop control of distributed energy resources (DERs), share the reactive power among DERs more reasonably and solve the problem of circumfluence in microgrids. The specific designs are as follows: to improve the control effect on voltages and frequency of DERs, an event-trigger mechanism is designed in the physical layer. When the trigger conditions in the mechanism aren’t met, only the droop control (i.e., primary control) is used in the controlled system. Otherwise, a virtual leader-following consensus control method is used in the cyber layer to accomplish the secondary control on DERs; to share the reactive power reasonably, a method of double virtual impedance is designed in the physical layer to adjust the output reactive power of DERs; to suppress circumfluence, a method combined with consensus control without leader and sliding mode control (SMC) is used in the cyber layer. Finally, the effectiveness of the proposed hierarchical control strategy is confirmed by simulation results.

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“…In the normal operation where the microgrid is connected to the massive grid, DGs into the power network can track the grid energy flow and operate without control requirment. In the event of short circuit or planned interruption, the microgrid can be disconnected from the large grid to operate in autonomous mode where proper control methods are applied in order to ensure stability of power [4], [5]. The autonomous functionality can provide more elacticity to the DGs involvement and bring a more efficient power supply.…”

Section: Introductionmentioning

confidence: 99%

Detailed analysis of grid connected and islanded operation modes based on P/U and Q/f droop characteristics

Salem¹,

Alzaaree

2021

IJPEDS

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This paper presents a thorough control structure of the distributed generators inside the microgrid during both grid-connected and islanded operation modes. These control structures of the DGs voltage source inverters are implemented in synchronous reference frame (SRF) and controlled using linear PI controllers. By implementing the control structures, the desired real and reactive power can be efficiently transferred to the local loads and the utility load by the microgrid generating units. A modified droop control technique is introduced to facilitate the microgrid performance during both modes of operation. The active and reactive power sharing of the load demand between the utility grid and the microgrid can be performed by this drop control technique during the islanded mode. The system performance during intentional islanding event and utility load increase is investigated. The effectiveness of the offered control structures is confirmed through simulation results during both modes of operation.

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An Improved Droop Control Strategy Based on Changeable Reference in Low-Voltage Microgrids

Cited by 10 publications

References 31 publications

Adaptive coordination of sequential droop control for PV inverters to mitigate voltage rise in PV-Rich LV distribution networks

Adaptive coordination of sequential droop control for PV inverters to mitigate voltage rise in PV-Rich LV distribution networks

A Novel Hierarchical Control Strategy for Low-Voltage Islanded Microgrids Based on the Concept of Cyber Physical System

Detailed analysis of grid connected and islanded operation modes based on P/U and Q/f droop characteristics

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