A Generalized Droop Control for Grid-Supporting Inverter Based on Comparison Between Traditional Droop Control and Virtual Synchronous Generator Control

Meng, Xin; Liu, Jinjun; Liu, Zeng

doi:10.1109/tpel.2018.2868722

Cited by 369 publications

(151 citation statements)

References 28 publications

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“…On the other hand, higher damping coefficient unlike larger inertia, lowers the oscillations in the system due to improved dynamic response to attain steady-state faster with lower overshoots. Usually, the VSG damping coefficient can be optimized unlike in the conventional synchronous generator whose damping power is fixed by the physical damper windings [20][21][22][23][24][25][26][27].…”

Section: Adaptive Droop With a Dead-band And Vsgmentioning

confidence: 99%

“…Without the support of energy storage elements, the inertia cannot be provided even under the VSG control. Conversely, when there is energy storage in the system, the virtual inertia can also be provided by properly setting the droop coefficient [22,24]. The VSG enhances inertia of the AC and DC networks for frequency regulation as well as restrain variations in DC voltage respectively.…”

Section: Introductionmentioning

confidence: 99%

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Multiterminal Medium Voltage DC Distribution Network Hierarchical Control

et al. 2020

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In this research study, a multiterminal voltage source converter (VSC) medium voltage DC (MVDC) distribution network hierarchical control scheme is proposed for renewable energy (RE) integration in a co-simulation environment of MATLAB and PSCAD/EMTDC. A DC optimal power flow (DC OPF) secondary controller is created in MATLAB. In PSCAD/EMTDC, the main circuit containing the adaptive DC voltage droop with a dead band and virtual synchronous generator (VSG) based primary controller for the VSCs is implemented. The simulation of the MVDC network under the proposed hierarchical control scheme is investigated considering variations in wind and solar photovoltaic (PV) power. The network is also connected to the standard IEEE-39 bus system and the hierarchical scheme tested by assessing the effect of tripping as well as restoration of the REs. The results show that during random variations in active power such as increasing wind and PV power generation, a sudden reduction or tripping of wind and PV power, the primary controller ensures accurate active power sharing amongst the droop-based VSCs as well as regulates DC voltage deviations within the set range of 0.98–1.02 pu with an enhanced dynamic response. The DC OPF secondary control optimizes the system’s losses by 38% regularly giving optimal droop settings to the primary controllers to ensure proper active power balance and DC voltage stability. This study demonstrates that the hierarchical control strategy is effective for RE integration in the MVDC distribution network.

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Section: Adaptive Droop With a Dead-band And Vsgmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiterminal Medium Voltage DC Distribution Network Hierarchical Control

et al. 2020

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“…For PWM-VSC, it can be found mainly as decoupled control, decoupled power control or feed-forward decoupling control strategy. For space vector modulation converters, it is related as direct control or direct current control strategy and for distributed generators in the islanded mode, it is adapted as a droop control strategy [38][39][40][41][42].…”

Section: Control Strategymentioning

confidence: 99%

The Performance of the BTB-VSC for Active Power Balancing, Reactive Power Compensation and Current Harmonic Filtering in the Interconnected Systems

et al. 2020

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Nowadays, the use of power converters to control active and reactive power in AC–AC grid-connected systems has increased. With respect to indirect AC–AC converters, the tendency is to enable the back-to-back (BTB) voltage source converter (VSC) as an active power filter (APF) to compensate current harmonics. Most of the reported works use the BTB-VSC as an auxiliary topology that, combined with other topologies, is capable of active power regulation, reactive power compensation and current harmonic filtering. With the analysis presented in this work, the framework of the dynamics associated with the control loops is established and it is demonstrated that BTB-VSC can perform the three tasks for which, in the reviewed literature, at least two different topologies are reported. The proposed analysis works to support the performance criteria of the BTB-VSC when it executes the three control actions simultaneously and the total current harmonic distortion is reduced from 27.21% to 6.16% with the selected control strategy.

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“…In WT's micro-grid system, energy storage devices (WTs rotors, DC side capacitors) can be used to provide additional inertia for the system under the action of additional virtual inertia control [10][11][12][13][17][18][19][20]. At the same time, the micro-grid under the droop control can also provide a certain inertia [19,25]. The following is a detailed inertia analysis of the system from the WT, capacitor, and micro-grid simulated by droop control converter.…”

Section: Inertial Source Analysis Of Wt Accessing Micro-grid Systemmentioning

confidence: 99%

Analysis of Inertia Characteristics of Direct-Drive Permanent-Magnet Synchronous Generator in Micro-Grid

Zhang

Xiong

et al. 2019

Energies

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Micro-grid has received extensive attention as an effective way to absorb new energy. Compared to large power systems, the micro-grid system consisting of power electronics is relatively weak due to the lack of support for synchronous machines. In this paper, the direct-drive wind turbine (WT) is connected to the low-inertia micro-grid as the research background. Based on the virtual inertia control of the WT, the inertia source and the physical mechanism of the WT connected to the micro-grid system are studied. The inertia characteristics of the rotor of the WT on the electromechanical time-scale, the DC side capacitor on the DC voltage time-scale, and the simulated grid under the droop control are analyzed. The research results show that under the control of the system, the inertia of the system is derived from the WT, DC capacitor, and the micro-grid simulated by droop control converter. The equivalent inertia of each link is determined by the control parameters, steady-state operating point, and structural parameters. The resulting inertia characteristics will have frequency domain characteristics under control. Finally, the correctness of the system inertia analysis conclusion is verified by simulation and experiment.

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A Generalized Droop Control for Grid-Supporting Inverter Based on Comparison Between Traditional Droop Control and Virtual Synchronous Generator Control

Cited by 369 publications

References 28 publications

Multiterminal Medium Voltage DC Distribution Network Hierarchical Control

Multiterminal Medium Voltage DC Distribution Network Hierarchical Control

The Performance of the BTB-VSC for Active Power Balancing, Reactive Power Compensation and Current Harmonic Filtering in the Interconnected Systems

Analysis of Inertia Characteristics of Direct-Drive Permanent-Magnet Synchronous Generator in Micro-Grid

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