Reduced-order modeling of DFIG-based wind turbine connected into weak AC grid based on electromechanical time scale
Sign Up to like & getrecommendations! 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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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
Sign Up to like & getrecommendations! 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
Impedance analysis and stabilization control of the LCL-type wind power inverter under weak grid conditions
Sign Up to like & getrecommendations! 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
Robustness Improvement of Single-Phase Inverters Under Weak Grid Cases by Adding Grid Current Feedforward in Delay-Based Phase-Locked Loop
Sign Up to like & getrecommendations! 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
Active Damping Adaptive Controller for Grid-Connected Inverter Under Weak Grid
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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
Harmonic Suppression and Stability Enhancement of a Voltage Sensorless Current Controller for a Grid-Connected Inverter Under Weak Grid
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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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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
Explicit Impedance Modeling and Shaping of Grid-Connected Converters via an Enhanced PLL for Stabilizing the Weak Grid Connection
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DOI: 10.1109/access.2022.3226818
Abstract: The voltage source converters (VSCs) are used to interface and control the renewable energy resources that are integrated into the power grids. However, a weak grid connection raises a stability problem for grid synchronization of… read more here.
Keywords: impedance model; grid connection; weak grid; impedance ... See more keywords
Wideband dq-Frame Impedance Modeling of Load-Side Virtual Synchronous Machine and Its Stability Analysis in Comparison With Conventional PWM Rectifier in Weak Grid
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DOI: 10.1109/jestpe.2020.2989748
Abstract: The load-side virtual synchronous machine (LVSM) enables the load to actively participate in the grid regulation, but it might still induce oscillations in a weak grid. Considering the dc-link voltage controller, power loops, ac voltage… read more here.
Keywords: tex math; inline formula; impedance; weak grid ... See more keywords
An Estimation-Based Solution to Weak-Grid-Induced Small-Signal Stability Problems of Power Converters
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DOI: 10.1109/jestpe.2020.3030720
Abstract: The large-scale deployment of grid-tied power electronic converters in renewable generation, electric motor drives, and energy storage systems speeds up the global energy transition. However, the stability problems faced by power converters in weak grids,… read more here.
Keywords: stability problems; weak grid; solution; power ... See more keywords