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   Articles with "weak grid" as a keyword



Review of HVDC technologies for weak grid interconnectors

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recommendations! Published in 2024 at "Electrical Engineering"

DOI: 10.1007/s00202-024-02761-6

Abstract: HVDC has experienced substantial growth in utilization globally, attributable to its superior capacity for transmitting large amounts of power relative to its HVAC counterpart and its increasingly competitive pricing. Voltage source converter technology, a variant… read more here.

Keywords: technologies weak; grid interconnectors; review hvdc; weak grid ... See more keywords
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Reduced-order modeling of DFIG-based wind turbine connected into weak AC grid based on electromechanical time scale

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recommendations! Published in 2020 at "Energy Reports"

DOI: 10.1016/j.egyr.2020.11.114

Abstract: Abstract Nowadays, the stability issue of the doubly fed induction generator (DFIG)-based wind turbines tied into weak AC power grid has attracted more and more attention. To analyze the stability of such cascade system, it… read more here.

Keywords: order; based wind; time scale; dfig based ... See more keywords

Single Stage PLL-less Decoupled Active and Reactive Power Control for Weak Grid Interactive Inverters

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recommendations! Published in 2020 at "IFAC-PapersOnLine"

DOI: 10.1016/j.ifacol.2020.12.1267

Abstract: Abstract This paper presents a single stage phase locked loop-less (PLL-less) active and reactive power (PQ) control for single-phase weak grid interactive inverters. The absence of the PLL requirement in the proposed PQ control enhances… read more here.

Keywords: control; single stage; reactive power; weak grid ... See more keywords

Magnifying effect of weak grid connection for a PMSG to induce torsional sub‐synchronous oscillations under the condition of open‐loop modal resonance

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recommendations! Published in 2020 at "Iet Renewable Power Generation"

DOI: 10.1049/iet-rpg.2019.0126

Abstract: When open-loop modal resonance (OLMR) happens, a grid-connected PMSG may induce torsional sub-synchronous oscillations (SSOs) in a power system. This study examines the magnifying effect of a weak grid connection for the PMSG to induce… read more here.

Keywords: grid connection; connection; pmsg; weak grid ... See more keywords

A modified synchronverter for a weak grid with virtual power circles‐based PQ decoupling scheme

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recommendations! Published in 2024 at "IET Renewable Power Generation"

DOI: 10.1049/rpg2.13118

Abstract: The high penetration of renewable energy sources (RES) results in a low‐inertia, weak power grid. To mitigate this and restore system inertia, it has been widely proposed to operate the inverters of RES units to… read more here.

Keywords: modified synchronverter; scheme; vsg; grid ... See more keywords

Impedance analysis and stabilization control of the LCL-type wind power inverter under weak grid conditions

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recommendations! Published in 2018 at "Journal of Renewable and Sustainable Energy"

DOI: 10.1063/1.5019462

Abstract: To address the instability issues of LCL-type wind power inverter's operation under weak grid conditions, stability control methods are investigated in this paper. Based on an inverter impedance model that considers an inner current control… read more here.

Keywords: inverter; control; power; impedance ... See more keywords

Frequency regulation optimization strategy of improved virtual synchronous generator under ultra-weak grid conditions

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recommendations! Published in 2025 at "AIP Advances"

DOI: 10.1063/5.0301216

Abstract: To enhance the frequency support capability of grid-forming energy storage systems governed by Virtual Synchronous Generators (VSGs) under ultra-weak grid conditions, an improved VSG frequency support strategy is proposed based on model predictive control. Initially,… read more here.

Keywords: ultra weak; frequency regulation; grid conditions; weak grid ... See more keywords

Robustness Improvement of Single-Phase Inverters Under Weak Grid Cases by Adding Grid Current Feedforward in Delay-Based Phase-Locked Loop

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recommendations! Published in 2020 at "IEEE Access"

DOI: 10.1109/access.2020.2995624

Abstract: For inverters, a phase-locked loop (PLL) is usually needed for the grid synchronization. Typically, for the single-phase inverters, the orthogonal-signal-generators based PLLs (e.g., delay-based PLL) can be used. However, if the grid at the point… read more here.

Keywords: impedance; weak grid; current feedforward; delay based ... See more keywords
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Active Damping Adaptive Controller for Grid-Connected Inverter Under Weak Grid

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recommendations! Published in 2021 at "IEEE Access"

DOI: 10.1109/access.2021.3115493

Abstract: The stability of grid-connected inverters is very sensitive to varying grid impedance, especially in the weak grid condition. In this paper, based on the Lyapunov method and with the micro-grid impedance identification, an active damping… read more here.

Keywords: active damping; stability; controller; weak grid ... See more keywords
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Harmonic Suppression and Stability Enhancement of a Voltage Sensorless Current Controller for a Grid-Connected Inverter Under Weak Grid

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recommendations! Published in 2022 at "IEEE Access"

DOI: 10.1109/access.2022.3166592

Abstract: This paper presents the harmonic suppression and stability enhancement of a grid voltage sensorless current controller for a grid-connected inverter under weak grid conditions. Given that inductive-capacitive-inductive (LCL) filters represented as higher-order dynamics cause resonance… read more here.

Keywords: connected inverter; voltage; stability; weak grid ... See more keywords

Robust Delay Compensation Strategy for LCLType Grid-Connected Inverter in Weak Grid

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recommendations! Published in 2022 at "IEEE Access"

DOI: 10.1109/access.2022.3176957

Abstract: Capacitor-current-feedback active damping has been widely adopted in digitally controlled LCL-type grid-connected inverters (GCIs). However, their digital control delay causes the system stability to deteriorate within a negative damping range. Particularly, in a weak grid,… read more here.

Keywords: grid; strategy; delay compensation; grid connected ... See more keywords