Stabilization of a power system with a distributed generator by a Virtual Synchronous Generator function

Sakimoto, Kenichi; Miura, Y.; Ise, Toshifumi

doi:10.1109/icpe.2011.5944492

Cited by 265 publications

(126 citation statements)

References 8 publications

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“…The definition of a synchronverter is introduced in [24] and highlights the differences from a VSG with the prominent difference being the lack of short term energy storage. Use of a VSG to enhance grid stability is discussed in [25] and [26] in which the swing equation is modelled to determine a virtual rotor angular velocity. Grid phase angle measurements and the determination of a virtual rotor phase angle allow a VSG to control the difference between the two.…”

Section: Virtual Synchronous Generationmentioning

confidence: 99%

“…Grid phase angle measurements and the determination of a virtual rotor phase angle allow a VSG to control the difference between the two. A governor control loop is applied to provide similar dynamics to a SG in [25] in which the governor is expressed as a first order lag element. Delays in determining the angular grid frequency are highlighted by [27] and a comparison with an ideal VSG is undertaken.…”

Section: Virtual Synchronous Generationmentioning

confidence: 99%

See 1 more Smart Citation

VSC-HVDC for Frequency Support (a review)

Fradley

Preece²,

Barnes³

2017

13th IET International Conference on AC and DC Power Transmission (ACDC 2017)

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To reduce CO2 emissions produced by electricity generation, conventional fossil fuel power plants are being decommissioned. Renewable energy sources (RES) and interconnectors are replacing these old power plants but have different operating characteristics. A key concern as the conventional fossil fuel power plants are displaced is the reduction in system inertia. A reduction in system inertia will require faster control schemes to be implemented to prevent frequency and rate of change of frequency (ROCOF) limits from being exceeded. Frequency response schemes that can emulate inertia, often called synthetic inertia, are required and this will necessitate the need for fast controlled devices. VSC-HVDC is a desirable interface option for the power levels and controllability required to provide synthetic inertia. This paper reviews supplementary frequency control schemes applied to VSC-HVDC and co-ordinated control strategies applicable to HVDC connected systems and islanded systems.

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Section: Virtual Synchronous Generationmentioning

confidence: 99%

Section: Virtual Synchronous Generationmentioning

confidence: 99%

VSC-HVDC for Frequency Support (a review)

Fradley

Preece²,

Barnes³

2017

13th IET International Conference on AC and DC Power Transmission (ACDC 2017)

View full text Add to dashboard Cite

show abstract

“…The energy storage is necessary to emulate the kinetic energy storage of the synchronous machine so that VSG can compensate the difference between input power of VSG and the measured output power from the grid [10].…”

Section: The Principle Of Vsgmentioning

confidence: 99%

Active Power Allocation of Virtual Synchronous Generator Using Particle Swarm Optimization Approach

Rahman¹,

Kerdphol²,

Watanabe³

et al. 2017

EPE

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In recent years, the penetration of renewable energy sources (RES) is increasing due to energy and environmental issues, causing several problems in the power system. These problems are usually more apparent in microgrids. One of the problems that could arise is frequency stability issue due to lack of inertia in microgrids. Lack of inertia in such system can lead to system instability when a large disturbance occurs in the system. To solve this issue, providing inertia support to the microgrids by a virtual synchronous generator (VSG) utilizing energy storage system is a promising method. In applying VSG, one important aspect is regarding the set value of the active power output from the VSG. The amount of allocated active power during normal operation should be determined carefully so that the frequency of microgrids could be restored to the allowable limits, as close as possible to the nominal value. In this paper, active power allocation of VSG using particle swarm optimization (PSO) is presented. The results show that by using VSG supported by active power allocation determined by the method, frequency stability and dynamic stability of the system could be improved.

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“…In view of the operational advantages, the voltage-controlled VSG is attracting more and more attentions, including VSG modelling [5,8], control strategy design [10][11][12][13] and stability analysis [14,15]. The VSG control strategy has been one of the major research directions in recent years.…”

Section: Introductionmentioning

confidence: 99%

Flexible unbalanced control with peak current limitation for virtual synchronous generator under voltage sags

Chen

Guo

Mei

2017

J. Mod. Power Syst. Clean Energy

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Virtual synchronous generator (VSG) is gridfriendly for integrating distributed generations (DGs) since it can emulate the operation mechanism of traditional synchronous generator (SG). However, the traditional VSG control strategy, which is mainly suitable for balanced voltage conditions, may lead to power oscillations, current unbalance and even overcurrent under unbalanced voltage sags. To overcome this difficulty, a flexible unbalanced control with peak current limitation for VSG under unbalanced operating conditions is proposed. Based on the basic VSG control algorithm, the control strategy integrates two novel control modules, which are current reference generator (CRG) and power reference generator (PRG). The proposed control strategy can flexibly meet different operation demands, which includes current balancing, constant active or reactive power. And the injected currents are kept within safety values for a better utilization of the VSG power capacity. Furthermore, the experimental platform is built. Experimental results demonstrate the validness and effectiveness of the proposed control strategy.

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Stabilization of a power system with a distributed generator by a Virtual Synchronous Generator function

Cited by 265 publications

References 8 publications

VSC-HVDC for Frequency Support (a review)

VSC-HVDC for Frequency Support (a review)

Active Power Allocation of Virtual Synchronous Generator Using Particle Swarm Optimization Approach

Flexible unbalanced control with peak current limitation for virtual synchronous generator under voltage sags

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