Reactive power control for load sharing with virtual synchronous generator control

Shintai, Toshinobu; Miura, Y.; Ise, Toshifumi

doi:10.1109/ipemc.2012.6258956

Cited by 61 publications

(28 citation statements)

References 5 publications

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“…Considering these general characteristics, several control strategies have been developed for allowing power electronic converters to provide synthetic or virtual inertia to the power system, and have been proposed for a variety of applications like for instance wind turbines, energy storage systems and HVDC transmission schemes [3][4][5][6][7][8][9][10][11][12][13][14][24][25][26]. Some of these control methods provide a synthetic inertial response to variations in the grid frequency and only a few aims to explicitly replicate the features of the traditional SMs.…”

Section: General Characteristics Of Vsmsmentioning

confidence: 99%

“…Given the inherent benefits of the SMs outlined above, a captivating approach is the control of power electronic converters to replicate the most essential properties of the SM and by that gain equivalent features from a functional point of view. Thus, several alternatives for providing auxiliary services like reactive power control, damping of oscillations and emulation of rotating inertia with power electronic converters have been proposed [3][4][5][6][7][8]. Some of these control strategies are explicitly designed to mimic the dynamic response of the traditional SM, and can therefore be classified in broad terms as Virtual Synchronous Machines (VSM).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Virtual Synchronous Machine implementation for distributed control of power converters in SmartGrids

D’Arco

Suul

Fosso

2015

Electric Power Systems Research

532

345

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a b s t r a c tThe ongoing evolution of the power system towards a "SmartGrid" implies a dominant role of power electronic converters, but poses strict requirements on their control strategies to preserve stability and controllability. In this perspective, the definition of decentralized control schemes for power converters that can provide grid support and allow for seamless transition between grid-connected or islanded operation is critical. Since these features can already be provided by synchronous generators, the concept of Virtual Synchronous Machines (VSMs) can be a suitable approach for controlling power electronics converters. This paper starts with a discussion of the general features offered by the VSM concept in the context of SmartGrids. A specific VSM implementation is then presented in detail together with its mathematical model. The intended emulation of the synchronous machine characteristics is illustrated by numerical simulations. Finally, stability is assessed by analysing the eigenvalues of a small-signal model and their parametric sensitivities.

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Section: General Characteristics Of Vsmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Virtual Synchronous Machine implementation for distributed control of power converters in SmartGrids

D’Arco

Suul

Fosso

2015

Electric Power Systems Research

532

345

View full text Add to dashboard Cite

show abstract

“…By controlling the switching pattern of an inverter, it can emulate the behavior of a real SG. To introduce the "sync" mechanism of SGs to inverters, some scholars have proposed the virtual synchronous generator (VSG), which enables inverters to mimic not only the steady-state characteristics of SGs, but also their transient characteristics by applying a swing equation to enhance the inertia [7][8][9][10][11][12][13][14]. VSG has draws much attention in recent years.…”

Section: Introductionmentioning

confidence: 99%

Transient Stability Analysis of Islanded AC Microgrids with a Significant Share of Virtual Synchronous Generators

et al. 2018

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Abstract:As an advanced control method that could bring extra inertia and damping characteristics to inverter-based distributed generators, the virtual synchronous generator (VSG) has recently drawn considerable attention. VSGs are expected to enhance the frequency regulation capability of the local power grid, especially the AC microgrid in island mode. However, the cost of that performance promotion is potential instability. In this paper, the unstable phenomena of the islanded microgrid dominated by SGs and distributed generators (DSs) are addressed after mathematical modeling and detailed eigenvalue analyses respectively. The influence of VSG key parameters, e.g., virtual inertia, damping factor, and droop coefficient on system stability is investigated, and the corresponding mathematical calculation method of unstable region is obtained. The theoretical analysis is well supported by time domain simulation results. The predicted frequency oscillation suggests the consideration of stability constrain during the VSG parameters design procedure.

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“…osaka-u.ac.jp * Osaka University 2-1, Yamada-oka, Suita, Osaka 565-0871, Japan VSG. Our research group introduced another VSG design (10) and added reactive power control to it to have a constant voltage at VSG terminals (11) . Faults on transmission lines cause voltage drops in several points in power system that affects electrical equipment.…”

Section: Introductionmentioning

confidence: 99%

Voltage Sag Ride-through Performance of Virtual Synchronous Generator

2015

Self Cite

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The Virtual Synchronous Generator (VSG) is an inverter control structure that supports power system stability by imitating a synchronous machine. Because of the restriction of inverter power and current, the VSG performance under disturbances should be evaluated and enhanced. In this paper, the response of the VSG unit to symmetrical and unsymmetrical voltage sags is assessed. A theoretical analysis that traces the trajectory of the state variable of the system during voltage sags is presented. The analysis confirms the effect of the characteristics of symmetrical and unsymmetrical voltage sags on the severity of their consequences. In addition, it is detected that two types of transients appear that must be mitigated: one is the transients during the voltage sag and the other one is the transients after voltage recovery. To prevent overcurrent during voltage sags, voltage amplitude control and output power control are implemented, and to suppress the transients after voltage recovery, virtual inertia control is implemented. The experimental results from a 10 kVA VSG-controlled inverter confirm the effectiveness of the additional controllers.

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Reactive power control for load sharing with virtual synchronous generator control

Cited by 61 publications

References 5 publications

A Virtual Synchronous Machine implementation for distributed control of power converters in SmartGrids

A Virtual Synchronous Machine implementation for distributed control of power converters in SmartGrids

Transient Stability Analysis of Islanded AC Microgrids with a Significant Share of Virtual Synchronous Generators

Voltage Sag Ride-through Performance of Virtual Synchronous Generator

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