Stability Analysis of Photovoltaic Virtual Synchronous Generators

Sun, Defeng; Liu, Hui; Song, Peng; Shunan, Gao; Sun, Yong

doi:10.1109/ciced.2018.8592321

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…The authors called the VSG a synchronous power controller. A more comprehensive study on the sensitivity of the power system stability to the VSG parameters was conducted in [125]. The small-signal model that was developed identified that three oscillation modes exist with poor damping induced by (i) the power control, (ii) the virtual impedance control, and (iii) the LC harmonic filter.…”

Section: Virtual Synchronous Generatorsmentioning

confidence: 99%

A Comprehensive Review of Small-Signal Stability and Power Oscillation Damping through Photovoltaic Inverters

2021

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This paper focuses on the methods that ensure the rotor angle stability of electric power systems, which is most frequently analyzed with small-signal models. Over the past several decades, power system stabilizers (PSSs) for conventional excitation systems were the main tools for improving the small-signal stability of electromechanical oscillatory modes. In the last decade, power oscillation damping (POD) control implemented in photovoltaic (PV) inverters has been considered an alternative to PSSs. As PV generation undergoes massive rollout due to policy directions and renewable energy source integration activities, it could potentially be used as a source of damping, which is crucial for sustaining the rotor angle stability of the remaining in-service synchronous generators. Several studies have already been dedicated to the development of different damping strategies. This paper contributes to the existing research in power system stability by providing a comprehensive review of the effects of PV generation on small-signal stability, as well as the recent evolution of POD control through PV inverters. The features and impacts of the various ways to realize POD controllers are assessed and summarized in this paper. Currently, detailed information and discussions on the practical application of PV inverter PODs are not available. This paper is, thus, intended to initiate a relevant discussion and propose possible implementation approaches concerning the topic under study.

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Section: Virtual Synchronous Generatorsmentioning

confidence: 99%

A Comprehensive Review of Small-Signal Stability and Power Oscillation Damping through Photovoltaic Inverters

2021

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“…This transformation poses significant challenges on system stability because of the reduced system inertia [1]. In order to address these challenges, the virtual synchronous generator (VSG) control with different implementation methodologies [2][3][4][5][6] [11,16,19,20] was proposed and currently a VSG pilot project has been implemented in China [7]. The core of VSG is emulating the swing equation of SGs to provide virtual inertia support for power systems.…”

Section: Introductionmentioning

confidence: 99%

Coordinated Damping Control Design for Power System With Multiple Virtual Synchronous Generators Based on Prony Method

Zhao

Yin²,

Xue

et al. 2021

IEEE Open J. Power Energy

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With more renewables integrated into power grids, the systems are being transformed into low inertia power electronic dominated systems. In this situation, the virtual synchronous generator (VSG) control strategy was proposed to deal with insufficient inertia challenge caused by the reduction of synchronous generation. However, as the VSG control method emulates the dynamic behavior of traditional synchronous machines, the interaction between multiple VSG controllers and synchronous generators (SGs) may cause low-frequency oscillation similar to that caused by the interaction between multiple SGs. This paper reveals that the system low-frequency oscillatory modes are affected by multiple VSGs. Then Prony analysis is utilized to extract the system mode information which will be subsequently used for VSG controller design, and a decentralized sequential coordinated method is proposed to design the supplementary damping controller (SDC) for multiple VSGs. The system low-frequency oscillation is first analyzed based on a modified two-area system with a linearized state-space model, and a further case study based on a revised New England 10-machine 39-bus system is used to demonstrate the effectiveness of the proposed coordinated method for multiple VSGs.

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Stability Analysis of Photovoltaic Virtual Synchronous Generators

Cited by 2 publications

References 9 publications

A Comprehensive Review of Small-Signal Stability and Power Oscillation Damping through Photovoltaic Inverters

A Comprehensive Review of Small-Signal Stability and Power Oscillation Damping through Photovoltaic Inverters

Coordinated Damping Control Design for Power System With Multiple Virtual Synchronous Generators Based on Prony Method

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