A Decentralized Control With Adaptive Virtual Inertia and Damping Combination for Islanded Cascaded-Type VSG Systems

Li, Lang; Zhou, Ke; Tian, Peng

doi:10.1109/access.2023.3340189

Cited by 2 publications

(1 citation statement)

References 32 publications

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“…VSG control technology simulates the external characteristics of the synchrotron by introducing the moment of inertia and damping coefficient, which is realized even in the face of power system disturbance. The inverter can also exert the role of inertia and damping for suppression, which greatly improves the stability of the system [3][4][5] , so VSG control technology has become one of the research hotspots.…”

Section: Introductionmentioning

confidence: 99%

Analysis of adaptive parameter tuning control strategy of VSG

Yang

2024

J. Phys.: Conf. Ser.

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The traditional virtual synchronous inverter employs constant inertia and damping control, resulting in poor reliability when the system faces disturbances. Consequently, this paper proposes a synchronous virtual machine network control strategy based on adaptive technology. Firstly, the traditional principle is analyzed, followed by an examination of the effects of varying inertia and damping levels on the power grid. Leveraging the power angle characteristic and frequency oscillation characteristic of synchronous generators, an inertia and damping adaptive control strategy is devised. Subsequently, the effectiveness of the strategy is validated through simulation curves generated by a Simlink model.

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Section: Introductionmentioning

confidence: 99%

Analysis of adaptive parameter tuning control strategy of VSG

Yang

2024

J. Phys.: Conf. Ser.

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Current coordinated distribution and voltage optimization control for multi-VSGs system considering nonlinear and negative sequence loads

Xie,

Zhang,

Zhang

et al. 2024

Front. Energy Res.

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In a microgrid system where multiple virtual synchronous generators (VSGs) are interconnected through high impedance cables, the total output negative sequence and harmonic current of multiple VSGs cannot be coordinated based on the capacity of each power conversion system (PCS). In addition, there is significant distortion in the voltage at the point of common coupling (PCC). Because the impedance amplitude and impedance angle of the cable change with the harmonic frequency, the resistive virtual impedance reshaping method and fixed impedance angle virtual impedance reshaping method used in the current research cannot solve the harmonic current distribution problem. To solve the above problems, a multi-frequency points VSG impedance reshaping control strategy is proposed in this paper, which can adjust the resistive and inductive output impedance of each harmonic frequency independently. The strategy is based on the harmonic separation algorithm of LPF with Feedforward Compensation (FCLPF) and the voltage controller of Vector Proportional Integral (VPI) in fundamental dq rotation coordinate system, which effectively improve the flexibility and accuracy of harmonic impedance reshaping. Among them, FCLPF harmonic separation algorithm has the characteristics of target frequency bandpass and non-target frequency notch, and can eliminate the coupling interference of each harmonic virtual impedance when accumulating virtual impedance voltage references at various frequency points. The closed-loop transfer function of the multi-parallel VPI voltage controller has the characteristics of unit gain and zero phase shift at each harmonic frequency point, which means the static response error of virtual impedance voltage command can be almost completely eliminated. Under the proposed control strategy, the fundamental positive power can be allocated according to the droop coefficient, the fundamental negative current and harmonic current can be allocated according to the sum of the reshaped virtual impedance and the actual line impedance. Reshaping virtual impedance at each harmonic frequency to negative value can also compensate the harmonic voltage drop on the high impedance cable and improve the voltage quality at the PCC.

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A Decentralized Control With Adaptive Virtual Inertia and Damping Combination for Islanded Cascaded-Type VSG Systems

Cited by 2 publications

References 32 publications

Analysis of adaptive parameter tuning control strategy of VSG

Analysis of adaptive parameter tuning control strategy of VSG

Current coordinated distribution and voltage optimization control for multi-VSGs system considering nonlinear and negative sequence loads

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