Distributed coordination control for suppressing circulating current in parallel inverters of islanded microgrid

Wu, Ying; Guerrero, Josep M.; Wu, Yanpeng

doi:10.1049/iet-gtd.2018.5454

Cited by 20 publications

(17 citation statements)

References 25 publications

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“…The key to solving such problems is to find a suitable coordination control protocol, so that a certain variable of the agents in the system tends to the same value, also known as the consensus problem [23,24]. Currently distributed consensus optimal control has been widely used in formation control [25], sensor network [26], congestion control [27] and coordinated control [28]. In the field of distributed ED, the consensus algorithm is more widely used than other distributed algorithms.…”

Section: Consensus Algorithmmentioning

confidence: 99%

Distributed economic dispatch method for power system based on consensus

Jian

Zhou

Zhao

et al. 2020

IET Renewable Power Generation

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This study performs an extensive review on distributed economic dispatch method for the power system based on consensus. It covers the comparison of centralised and distributed economic dispatch method in terms of system structure, performance requirement and solution process. The key links in the process of solving economic dispatch problem are summarised, and the advantages and disadvantages of the existing distributed economic dispatch algorithm are reviewed. Furthermore, the possible research directions, from the authors' point of view, are also provided in this study.

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Section: Consensus Algorithmmentioning

confidence: 99%

Distributed economic dispatch method for power system based on consensus

Jian

Zhou

Zhao

et al. 2020

IET Renewable Power Generation

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“…However, this assumption that is justified for a high-voltage system is impractical and difficult to ensure in low-voltage systems, such as islanded microgrids [1][2][3][4]. In the latter case, mismatched feeder line conditions often exist and the reactive power/voltage (Q i /V i ) relation exhibits poor reactive power sharing [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]27].…”

Section: Droop Controlmentioning

confidence: 99%

Consensus Control for Reactive Power Sharing Using an Adaptive Virtual Impedance Approach

Alsafran

Daniels

2020

Energies

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Reactive power sharing among distributed generators (DGs) in islanded microgrids (MGs) presents control challenges, particularly in the mismatched feeder line condition. Improved droop control methods independently struggle to resolve this issue and centralized secondary control methods exhibit a high risk of collapse for the entire MG system under any failure in the central control. Distributed secondary control methods have been recently proposed to mitigate the reactive power error evident in the presence of mismatched feeder lines. This paper details a mathematical model of an adaptive virtual impedance control that is based on both leaderless and leader-followers consensus controls with a novel triangle mesh communication topology to ensure accurate active and reactive power sharing. The approach balances an enhanced rate of convergence with the anticipated implementation cost. A MATLAB/Simulink model with six DG units validates the proposed control performance under three different communication structures: namely, ring, complete, and triangle mesh topologies. The results suggest that leaderless consensus control is a reliable option with large DG systems, while the leader-followers consensus control is suitable for the small systems. The triangle mesh communication topology provides a compromise approach balancing the rate of convergence and the expected cost. The extensibility and scalability are advantages of this topology over the alternate ring and complete topologies.

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“…In [22], feedback from the difference between the converters' currents is passed through a filter. In [23] the same input is passed through a PID filter. The problem in these methods is the introduction of latency and instability.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Droop Control Method for Suppressing Circulating Currents in DC Microgrids

Ghanbari

Bhattacharya

2020

IEEE Open J. Power Energy

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DC microgrids are introduced to reduce the conversion stages needed for connection of DC sources to the DC loads. They employ the droop control algorithm for managing the power flow from sources to the loads. However, the droop control functionality is affected by circuit parameters, especially line resistances. As a consequence, load sharing as the primary objective of the droop controller lacks accuracy. Parallel-connected converters have mismatched output voltages, resulting in circulating currents. This paper proposes an adaptive droop control algorithm for suppressing circulating currents in a low voltage DC microgrid. Line resistances are estimated through mathematical calculations and droop parameters are adjusted accordingly. Moreover, a distributed secondary controller is proposed to improve the load sharing accuracy and eliminate the effect of line resistances. The secondary controller shifts the droop controller voltage setpoint according to the converter current. Both of the proposed methods result in an accurate load sharing; Each of the participating converters has the rated current and consequently circulating current is suppressed. The effectiveness of the proposed method is verified through simulation and hardware-in-theloop (HIL) setup. INDEX TERMS Circulating current, dc microgrid, distributed control, droop control, hardware-in-the-loop (HIL).

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Distributed coordination control for suppressing circulating current in parallel inverters of islanded microgrid

Cited by 20 publications

References 25 publications

Distributed economic dispatch method for power system based on consensus

Distributed economic dispatch method for power system based on consensus

Consensus Control for Reactive Power Sharing Using an Adaptive Virtual Impedance Approach

Adaptive Droop Control Method for Suppressing Circulating Currents in DC Microgrids

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