Virtual Synchronous Generator Control with Double Decoupled Synchronous Reference Frame for Single-Phase Inverter

Hirase, Yuko; Noro, Osamu; Yoshimura, Eiji; Nakagawa, Hidehiko; Sakimoto, Kenichi; Shindo, Yuji

doi:10.1541/ieejjia.4.143

Cited by 25 publications

(9 citation statements)

References 11 publications

(12 reference statements)

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“…It also reveals that the system goes near to the boundary. Based on (28) or (29), the operating angle limit can be estimated as δ max ≪1°. In this critical situation, a small disturbance even may lead the system to operate outside the feasible set and make VSCs lose the stability suddenly, which finally may lead the entire system to collapse.…”

Section: A Experiments Illustration and Analysismentioning

confidence: 99%

“…In the recent years, some literatures are introducing to imitate synchronous generators for VSCs to improve the stability. Some control strategies named synchronverter [27], virtual synchronous generators [28]- [29] or virtual synchronous machines [30] are proposed. The above methods are all based on the idea of virtual inertia and DC-link storage to mimic the synchronous generators in the electrical system.…”

Section: Introductionmentioning

confidence: 99%

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Angle Stability Analysis for Voltage-Controlled Converters

Lin

Jia

Guerrero

et al. 2017

IEEE Trans. Ind. Electron.

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Power electronics based voltage source converters (VSCs) keep increasing in modern electrical systems. As a branch of stability problems, angle stability is significant for an electrical system. Based on small disturbance analysis and time scale decomposition perspective, this paper proposes a criterion to analyze the quasi-steady angle stability and the direct current (DC) side stability for VSCs. The operating limit and the angle instability mechanism are revealed, which is generally applicable to the voltage-controlled converters. During the analysis, the influence of the parameters on angle stability is studied. Further, the difference on instability mechanism between power electronic converters and synchronous generators are explained in detail. Finally, experiment results with corrective actions verify the analysis.

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Section: A Experiments Illustration and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Angle Stability Analysis for Voltage-Controlled Converters

Lin

Jia

Guerrero

et al. 2017

IEEE Trans. Ind. Electron.

View full text Add to dashboard Cite

show abstract

“…In recent years, power conversion systems (PCSs) for a DC to single-phase AC grid has been studied actively for photovoltaics systems or battery energy storage systems and so on [1][2][3]. In the single-phase grid, an instantaneous power oscillates at twice the grid frequency, whereas the PV output power requires constant power for achieving higher maximum power point tracking (MPPT) efficiency.…”

Section: Introductionmentioning

confidence: 99%

Single-Phase AC Grid-Tied Inverter with Buck-Type Active Power Decoupling Circuit Operated in Discontinuous Current Mode

et al. 2021

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This study presents a novel circuit topology for a single-phase inverter using an active power decoupling circuit operated in discontinuous current mode (DCM). In a conventional single-phase grid-tied inverter, bulky capacitors are used in a DC-link to absorb a power ripple with twice the grid frequency. However, electrolytic capacitors limit a converter's lifetime. In contrast, ceramic capacitors are used in the proposed circuit since the required capacitance is reduced. Furthermore, the active power decoupling circuit in DCM has no inductor inside by utilizing the current zero cross featured in DCM for power ripple compensation modes. An experimental verification using a 1-kW prototype shows a 90.2% current ripple reduction caused by the power ripple with twice the grid frequency. The efficiency exceeds 94% in the 20% region of the rated power to 1-kW through 96.0% of the 650 W maximum. According to a theoretical evaluation using a Pareto-front optimization assumed as a 3-kW system, the proposed circuit reaches the maximum power density at 20 kHz which is 115 % higher than that of the passive power decoupling method. The inductor volume in the proposed circuit is reduced by 30.4% compared to a conventional buck-type active power decoupling circuit.

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“…The virtual synchronous generator (VSG) was first proposed in [11], because of its capability to stabilize using virtual rotational inertia; along with a droop control. The inverter control strategies that mimic synchronous generator have been presented as virtual synchronous generator [12], followed by virtual synchronous machines (VSM) in [13], virtual synchronous machine (VISMA) in [14], and synchronverter in [15].…”

Section: Introductionmentioning

confidence: 99%

VSG Stability and Coordination Enhancement under Emergency Condition

et al. 2018

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Renewable energy sources are integrated into a grid via inverters. Due to the absence of an inherent droop in an inverter, an artificial droop and inertia control is designed to let the grid-connected inverters mimic the operation of synchronous generators and such inverters are called virtual synchronous generators (VSG). Sudden addition, removal of load or faults in the grid causes power and frequency oscillations in the grid. The steady state droop control of VSG is not effective in dampening such oscillations. Therefore, a new control scheme, namely bouncy control, has been introduced. This control uses a variable emergency gain, to enhance or reduce the power contribution of individual VSGs during a disturbance. The maximum power contribution of an individual VSG is limited by its power rating. It has been observed that this control, successfully minimized the oscillation of electric parameters and the power system approached steady state quickly. Therefore, by implementing bouncy control, VSGs can work in coordination to make the grid more robust. The proposed controller is verified through Lyapunov stability analysis.

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Virtual Synchronous Generator Control with Double Decoupled Synchronous Reference Frame for Single-Phase Inverter

Cited by 25 publications

References 11 publications

Angle Stability Analysis for Voltage-Controlled Converters

Angle Stability Analysis for Voltage-Controlled Converters

Single-Phase AC Grid-Tied Inverter with Buck-Type Active Power Decoupling Circuit Operated in Discontinuous Current Mode

VSG Stability and Coordination Enhancement under Emergency Condition

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