Voltage Sag Ride-through Performance of Virtual Synchronous Generator

Alipoor, Jaber; Miura, Yushi; Ise, Toshifumi

doi:10.1541/ieejjia.4.654

Cited by 20 publications

(13 citation statements)

References 17 publications

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“…the capacitive model (for assessing the SoC) and the voltage model (for terminal voltage calculation of batteries). Considering (11) from [61], it is observed that when BES is applied with VSG, the nominal active power produced by VSG depends on deviations in nominal frequency from the reference value…”

Section: Battery Energy Storagementioning

confidence: 99%

“…Following VISMA initial design, many other PI controller topologies are used for the VSG controller [9]. The simplicity of the controller design makes it the most common controller adopted for the frequency and voltage controls [10][11][12]. The downside of the controller is the inability to follow the voltage or frequency reference without steady-state error caused by the integral term.…”

Section: Introductionmentioning

confidence: 99%

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Progress in control and coordination of energy storage system‐based VSG: a review

Othman

Mokhlis

Mubin

et al. 2019

IET Renewable Power Generation

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Virtual synchronous generator (VSG) is an important concept toward frequency stabilisation of the modern power system. The penetration of power electronic-based power generation in power grid reduces the total inertia, and thus increases the risk of frequency instability when disturbance occurs in the grid. VSG produces virtual inertia by injecting appropriate active power value to the grid when needed. This virtual inertia can stabilise the grid frequency in case of a power imbalance between generation and loads or any disturbances that affected frequency stability. Its intensive research can see the importance of VSG in inertia control and various intelligent controller techniques. 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 damping during inertia response. A review on the type of energy storage system used for VSG and their benefits is also presented. Finally, perspective on the technical challenges and potential future research related to VSG is also discussed in this study. Nomenclature P g measured active power Q g measured reactive power P * active power reference Q* reactive power reference V g * output voltage reference V g output voltage ω o reference angular frequency ω g grid Frequency ω r rotor angular frequency J moment of inertia constant D damping coefficient constant δ VSG phase angle X output reactance of the VSG K w governor proportional control gain K q reactive power proportional control gain T Q reactive power first-order lag time constant

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Section: Battery Energy Storagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Progress in control and coordination of energy storage system‐based VSG: a review

Othman

Mokhlis

Mubin

et al. 2019

IET Renewable Power Generation

View full text Add to dashboard Cite

show abstract

“…Full state space model is rarely used due to the nonlinearity of the model. Energy functions and Lyapunov method are considered as an efficient technique as in [28,30,35,59], however, it is not feasible for complex systems. If the entire dynamic characteristics of SG is to be reproduced by VSG, the SG model incorporating a full order features of SG has to be modelled [7,22,24] and this would results in 7 th order model.…”

Section: Review Of the Existing Virtual Synchronous Generator Controlmentioning

confidence: 99%

Virtual synchronous generator: an overview

Mohammed¹,

Otuoze²,

Salisu³

et al. 2019

Nig. J. Tech.

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The continuous increase in the penetration of renewable energy (RE) based distributed generations (DGs) in the power system network has created a great concern on the stability of the existing grid. Traditional bulk power plants, which are dominated by synchronous machines (SMs) can easily support system instability, due to the inherent rotor inertia and damping characteristic, as well as voltage (reactive power) control ability. Nevertheless, converter based RE has some special characteristics, such as stochastic real and reactive power output, quick active and reactive power response, small output impedance, and little or no inertia and damping property thereby causing frequency and voltage instability in the system. To solve this problem, virtual synchronous generator (VSG) concept was proposed to emulate some of the features of conventional SG through converter control strategy in order to provide additional inertia virtually. Different control schemes for VSG has been proposed in literature. Surprisingly, an overview of these schemes is yet to be efficiently presented. This paper presents an overview of the VSG control schemes. It provides the concepts, the features of the control schemes and the applications of VSG. Finally, the crucial issues regarding VSG control schemes and the necessary improvement that need to be addressed are highlighted.

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“…When the grid voltage is unbalanced, the proposed control strategy will fail. In [13], a VSG control strategy is proposed, in the case of voltage dips to enhance the VSG's low-voltage ride-through capability so that the inverter would not be off-grid in the event of a voltage dip. In order to ensure that the inverter can work in a complex environment and solve the stability problem of VSG control to further reduce the steady-state error, the ADRC module is added.…”

Section: Introductionmentioning

confidence: 99%

Active Disturbance Rejection Control Strategy for Grid-Connected Photovoltaic Inverter Based on Virtual Synchronous Generator

2019

IEEE Access

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In order to solve the problem of insufficient control performance of various traditional control strategies in the complex environment of grid-connected inverters, the active disturbance rejection control (ADRC) strategy based on the virtual synchronous generator (VSG) is proposed. The mathematical model of a grid-connected photovoltaic inverter based on the VSG is built. The proposed control strategy provides the inverter with more disturbance attenuation and provides rotational inertia. The control strategy estimates and compensates the total disturbance and generates the reference active power and reactive power by ADRC. The control strategy converts the three-phase voltage and current outputs into positive and negative sequences on the dq reference frame. The VSG control module generates a reference voltage command and outputs it to the dual closed loop PI feedforward decoupling control. The PWM signal is finally obtained by the PI feedforward decoupling control. The ADRC strategy based on the VSG does not change the original control characteristics of the VSG; it retains the characteristics of the synchronous generator, and it also provides inertia and damping for the power grid. The simulation shows that the ADRC strategy based on the VSG applied to the inverter can attenuate disturbances. Under the unfavorable conditions of the unstable reference power, such as the unbalanced three-phase voltage and the random disturbance, the output power matches the international electricity standard. INDEX TERMS Virtual synchronous generator (VSG), active disturbance rejection control (ADRC), power control, grid-connected inverter, positive and negative separation. The associate editor coordinating the review of this manuscript and approving it for publication was Huanqing Wang.

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Voltage Sag Ride-through Performance of Virtual Synchronous Generator

Cited by 20 publications

References 17 publications

Progress in control and coordination of energy storage system‐based VSG: a review

Progress in control and coordination of energy storage system‐based VSG: a review

Virtual synchronous generator: an overview

Active Disturbance Rejection Control Strategy for Grid-Connected Photovoltaic Inverter Based on Virtual Synchronous Generator

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