PV-based virtual synchronous generator with variable inertia to enhance power system transient stability utilizing the energy storage system

Liu, Ju; Yang, Danting; Yao, Wei; Fang, Rengcun; Zhao, Hongsheng; Wang, Bo

doi:10.1186/s41601-017-0070-0

Cited by 66 publications

(37 citation statements)

References 18 publications

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“…In this way, renewable power plants can also provide inertia and primary frequency response like conventional thermal generators. This technique is commonly named virtual synchronous machine (VSM) [19]- [23]. Gevorgian et al evaluated the contribution of synthetic inertia and primary frequency response from wind generation to improve the system frequency response performance [24].…”

Section: B Literature Reviewmentioning

confidence: 99%

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Modeling Frequency Dynamics in Unit Commitment With a High Share of Renewable Energy

Zhang

Wang

Teng

et al. 2020

IEEE Trans. Power Syst.

188

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The power system inertia is gradually decreasing with the growing share of variable renewable energy (VRE). This may jeopardize the frequency dynamics and challenges the secure operation of power systems. In this paper, the concept of frequency security margin is proposed to quantify the system frequency regulation ability under contingency. It is defined as the maximum power imbalance that the system can tolerate while keeping frequency within the tolerable frequency range. A frequency constrained unit commitment (FCUC) model considering frequency security margin is proposed. Firstly, the analytical formulation of system frequency nadir is derived while considering both the frequency regulation characteristics of the thermal generators and the frequency support from VRE plants. Then, the frequency security margin is analytically formulated and piecewise linearized. A novel FCUC model is proposed by incorporating linear frequency security constraints into the traditional unit commitment model. Case studies on a modified IEEE RTS-79 system and HRP-38 system are provided to verify the effectiveness of the proposed FCUC model. The impacts of VRE penetration on system frequency security are analyzed using frequency security margin. Index Terms-frequency dynamics, power system inertia, unit commitment, high share of renewable energy, virtual synchronous machine.

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Section: B Literature Reviewmentioning

confidence: 99%

“…Equations (21) and (22) show the relationships among the on/off status variable, start-up variable and shut-down variable. Equations (23) and (24) are the ramp limits. Equations (25) and (26) limit the minimum online and offline time.…”

Section: A Traditional Unit Commitment (Tuc)mentioning

confidence: 99%

Modeling Frequency Dynamics in Unit Commitment With a High Share of Renewable Energy

Zhang

Wang

Teng

et al. 2020

IEEE Trans. Power Syst.

188

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“…Synchronous voltage source converter (VSC), virtual synchronous control (VSYNC), synchronous inverter (SI), and synchronous converter are the interchangeable terms. Sometimes, it is also known as a photovoltaic virtual synchronous generator (PVSG) or PV-VSG, which consists of solar PV and SG [26]. The general single line diagram of a grid-connected VI-based inverter is illustrated in Figure 4.…”

Section: Implementation Of Vi-based Invertersmentioning

confidence: 99%

Virtual Inertia-Based Inverters for Mitigating Frequency Instability in Grid-Connected Renewable Energy System: A Review

2019

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This study paper presents a comprehensive review of virtual inertia (VI)-based inverters in modern power systems. The transition from the synchronous generator (SG)-based conventional power generation to converter-based renewable energy sources (RES) deteriorates the frequency stability of the power system due to the intermittency of wind and photovoltaic (PV) generation. Unlike conventional power generation, the lack of rotational inertia becomes the main challenge to interface RES with the electrical grid via power electronic converters. In the past several years, researchers have addressed this issue by emulating the behavior of SG mathematically via pulse width modulation (PWM) controller linked to conventional inverter systems. These systems are technically known as VI-based inverters, which consist of virtual synchronous machine (VSM), virtual synchronous generator (VSG), and synchronverter. This paper provides an extensive insight into the latest development, application, challenges, and prospect of VI application, which is crucial for the transition to low-carbon power system.

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“…Reference [12] presents a coordinated control method of distributed energy storage systems for voltage regulation in a distribution network. A control strategy is proposed in [13] to enable the PVs to operate as a synchronous generator with variable inertia using an energy storage system to deal with the problems caused by high PV penetration in power systems.…”

Section: Introductionmentioning

confidence: 99%

Power quality enhancement and engineering application with high permeability distributed photovoltaic access to low-voltage distribution networks in Australia

Wong²,

Wang

et al. 2020

Prot Control Mod Power Syst

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Considering power quality problems such as overvoltage and three-phase unbalance caused by high permeability distributed photovoltaic access in low-voltage distribution networks, this paper proposes a comprehensive control scheme using a static var. generator (SVG), electric energy storage (EES), a phase switching device (PSD) and an intelligent terminal controller. The control strategies of transformer overload, bus over/under voltage, anticountercurrent, storage battery state of charge (SOC) maintenance, and three-phase unbalance are studied. The engineering application in the Greenvale low-voltage distribution networks in Australia with high permeability distributed photovoltaics is discussed. The results show that the intelligent terminal controller is able to improve the power quality of low-voltage distribution networks through coordination with EES, SVG and PSD.

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PV-based virtual synchronous generator with variable inertia to enhance power system transient stability utilizing the energy storage system

Cited by 66 publications

References 18 publications

Modeling Frequency Dynamics in Unit Commitment With a High Share of Renewable Energy

Modeling Frequency Dynamics in Unit Commitment With a High Share of Renewable Energy

Virtual Inertia-Based Inverters for Mitigating Frequency Instability in Grid-Connected Renewable Energy System: A Review

Power quality enhancement and engineering application with high permeability distributed photovoltaic access to low-voltage distribution networks in Australia

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