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Sequence-Impedance-Based Stability Comparison between VSGs and Traditional Grid-Connected Inverters
2018
IEEE transactions on power electronics
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In this letter, the small-signal sequence impedance model of the virtual synchronous generator (VSG) is built, and the sequence impedance characteristics of the VSG and the TGCI are compared and analyzed ...
Finally, experimental results validate the sequence impedance model and the stability analysis. ...
Finally, the experimental results validate the sequence impedance model and stability analysis. II. ...
doi:10.1109/tpel.2018.2841371
fatcat:kh4qqk2dsrdphcbt7exf6t4ln4
Analysis and Mitigation of Sub-Synchronous Resonance for Doubly Fed Induction Generator under VSG Control
2020
Energies
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Based on impedance analysis, the influence of VSG control parameters and the configuration of damping factor of reactive power are discussed. ...
Impedance modeling of DFIG systems is used to analyze SSR stability. ...
Impedance Validation and SSR Analysis
In this section, the proposed sequence impedance model of VSG control for DFIG will be validated. ...
doi:10.3390/en13071582
fatcat:i2csa5k6yjfyvbp4p4liconomi
Impedance modelling and grid integration stability evaluation of three‐phase virtual synchronous generator
2021
IET Power Electronics
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Three different impedance models of the VSG (conventional, considering RPL, and considering both MFE and RPL) are derived and compared in detail. ...
Here, the comprehensive sequence-impedance model of the VSG is developed by using the harmonic linearization method. ...
ACKNOWLEDGEMENTS This work was supported by the National Natural Science Foundation of China under Grant 51777095. ...
doi:10.1049/pel2.12214
fatcat:uttsufblrnhmpimzpcp5njgmfe
Impedance Modeling and Stability Analysis of VSG Controlled Grid-Connected Converters with Cascaded Inner Control Loop
2020
Energies
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This paper develops the impedance models of grid-connected converters under the virtual synchronous generator (VSG) strategy with a cascaded inner control loop and analyzes the system stability of VSG ...
system stability with the inductive weak grid, which can be avoided by increasing the proportional coefficients of the cascaded voltage and current controllers or applying a larger virtual resistor to ...
Impedance-Based System Stability Analysis of VSG Controlled Converters with Weak Grid In this section, impedance-based stability analysis is carried out to analyze the possible system instability of VSG ...
doi:10.3390/en13195114
fatcat:yszybwylevbmtf4dd7ygetkx3i
State of the Art of the Techniques for Grid Forming Inverters to Solve the Challenges of Renewable Rich Power Grids
2022
Energies
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It also provides a comprehensive review on frequency deviations and power system stability issues in low-inertia systems and recent advancements in control methods for harmonic mitigation. ...
However, the massive penetration of power electronic inverter/converter-interfaced renewable resources in power systems introduces new issues, such as voltage and frequency instabilities, because of their ...
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/en15051879
fatcat:zmvqmsy6qbfjdplmftvejcsymq
Modeling and Analysis of the Harmonic Interaction between Grid-Connected Inverter Clusters and the Utility Grid
2022
Energies
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Firstly, the output impedance model of a single VSG is established, and it is found that the resonance frequency is related to parameters including the output filter, controller, and grid impedance. ...
Finally, the simulation and experimental results verified the correctness of the established modeling and analysis of the harmonic interaction between the clustered VSGs and the utility grid. ...
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/en15103490
fatcat:42awtnaasfe4xcmm77sc2lrwji
A Comprehensive Virtual Synchronous Generator Control Strategy for Harmonic and Imbalance Voltage Suppression of Multi-Inverter Parallel Microgrid
2022
Electronics
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On one hand, an improved VSG control strategy is proposed to increase the damping and inertia of distributed generations (DGs) in the microgrid, and secondary control is introduced to improve system stability ...
Then small-signal analysis is used for analysis of the stability of the strategy. Finally, we verify the comprehensive control strategy proposed in this paper through experiments. ...
the proposed control strategy can increase the inertia of the microgrid system, improve the influence of frequency and voltage fluctuations on the power quality, and increase the system stability. ...
doi:10.3390/electronics11030492
doaj:221c5ee69217486897389d4617fdba5a
fatcat:mntwnctfxvex5jvgw5psg5iwpy
Modelling, Implementation, and Assessment of Virtual Synchronous Generator in Power Systems
2020
Journal of Modern Power Systems and Clean Energy
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Then the modelling methods of VSG are comprehensively reviewed and compared. Applications of the VSG in power systems are summarized as well. ...
Finally, the challenges and future trends of the VSG implementation are discussed. ...
Stability Analysis The VSG has its own special dynamics compared to the traditional grid-connected inverters, and changes the stability of traditional power systems [65] . ...
doi:10.35833/mpce.2019.000592
fatcat:vgisckzjr5c67dgopq5o7yxab4
Stable Operation and Small-Signal Analysis of Multiple Parallel DG Inverters Based on a Virtual Synchronous Generator Scheme
2018
Energies
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reference, and even the VSG stability control. ...
Furthermore, an accurate small-signal model of the multiple parallel VSGs system that considers the dynamic characteristics and the changing of a steady state operation point was derived for system analysis ...
Conflicts of Interest: The authors declare no conflict of interest. Energies 2018, 11, 203 ...
doi:10.3390/en11010203
fatcat:66jixuy53bblfppbzufpgthcua
Analysis of Offline Transient Power Oscillation and Its Suppression Method in the Microgrid with Multiple Virtual Synchronous Generators
2023
Energies
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Equivalently, the virtual inertia, damping coefficient and virtual impedance of the VSGs can be configured. ...
To analyze these complex high-order system dynamics, this paper first establishes an intuitive equivalent circuit model for multiple VSGs, and the frequency domain expressions of the multi-machine VSG ...
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/en16237711
fatcat:yhiedj63pzhddhrtjcxeacnori
Dynamic Modeling and Analysis of a Virtual Synchronous Generator with Supercapacitor
2023
Sustainability
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The bifurcation diagram of input active power is given in this paper, and the phase portraits and sequence diagrams of the frequency and power angle are presented to verify that, if the initial value of ...
The system's inertia decreases, leading to problems in the stability of the power grid. In this paper, a virtual synchronous generator model with a supercapacitor is analyzed. ...
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/su15021248
fatcat:cy24scyjkjhule7looed4yfvvq
Active disturbance rejection control strategy for grid-connected photovoltaic inverter based on virtual synchronous generator
2019
IEEE Access
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The control strategy converts the three-phase voltage and current outputs into positive and negative sequences on the dq reference frame. ...
The mathematical model of a grid-connected photovoltaic inverter based on the VSG is built. ...
CURRENT COMMAND CONTROL According to the mathematical model of the inverter, the current command calculation equation and the PI decoupled current control loop can be obtained. ...
doi:10.1109/access.2019.2894786
fatcat:wx7cuhsbinaovfjp7c2pbpxn4u
Cooperative Control Strategy of Multiple VSGs in Microgrid Based on Adjacent Information
2021
IEEE Access
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For more information, see https://creativecommons.org/licenses/by/4.0/ This article has been accepted for publication in a future issue of this journal, but has not been fully edited. ...
sequence current to obtain the SVPWM control signal, so as to improve the output power quality in the case of unbalanced three-phase voltage. ...
By reasonably configuring the parameters of the virtual capacitor and virtual impedance, the system stability is improved while the steady-state reactive power sharing error and voltage control accuracy ...
doi:10.1109/access.2021.3110848
fatcat:ndipocs7ajdf7bnfvd46ar3ftq
Grid Forming Inverter Modeling, Control, and Applications
2021
IEEE Access
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INDEX TERMS Current control, fault ride-through, grid forming inverters, power synchronization control, small-signal and transient stability, virtual inertia. ...
Research directions in terms of voltage control, frequency control, system strength improvement, and regulatory framework are also discussed. ...
Large-signal stability of GFMI and GFD VSG are compared using energy function modeling by the authors in [90] . ...
doi:10.1109/access.2021.3104617
fatcat:vqdyykvn2vbmlncyeamwltp2tq
Progress in Control and Coordination of Energy Storage System based Virtual Synchronous Generator: A Review
2019
IET Renewable Power Generation
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Owing to the importance of VSG in the modern power grid, this study provides a comprehensive review on the control and coordination of VSG toward grid stabilisation in terms of frequency, voltage and oscillation ...
Its intensive research can see the importance of VSG in inertia control and various intelligent controller techniques. ...
In a common VSG model, PI controller is used to regulate the voltage and reactive power by setting the phase voltage of inverter through comparing the value of reactive power reference as shown in Fig ...
doi:10.1049/iet-rpg.2019.0274
fatcat:uzjfdbetlvdkfdh6zlsma6ldsq
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