Inverter grid-connected oscillation
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A Grid Inductance Detection Method Based on the Oscillation
In grid-connected photovoltaic (PV) systems, grid inductance greatly influences the performance of grid-connected inverters. However, the grid inductance usually varies with the
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Analysis and Suppression of Harmonic Resonance in
In photovoltaic grid-connected systems, the interaction between grid-connected inverters and the grid may cause harmonic oscillation, which
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Impedance-Based Stability Analysis of Grid
As a common interface circuit for renewable energy integrated into the power grid, the inverter is prone to work under a three-phase unbalanced
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Low Frequency Oscillation Suppression of Three-Phase Four-Wire Inverter
To handle the low frequency oscillations of the three-phase four-wire inverter grid-connected system caused by small phase-locked range, slow locking speed and
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Admittance Modeling and Stability Enhancement of Grid-connected
In the renewable energy generation system, the phase-locked loop (PLL) for power grid synchronization plays a very important role, especially in weak grids. The asymmetric
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Small-Signal Modeling and Analysis of Grid
In this paper, the small-signal models of grid-connected inverter with both the droop control and the power differential droop control are
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Research on Stroboscopic Mapping Modeling and Bifurcation
For the grid-connected inverter system, the sustained constant-amplitude oscillations often occur. At this time, the grid-connected current undergoes oscillation, and the PWM process appears
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A Modified Grid-Connected Inverter Topology for Power
At present, the main methods to eliminate the output power oscillation of grid-connected inverter under unbalanced grid voltage can be divided into two categories: the first
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Overview of Impedance Passivation Methods for Grid
This paper provides a comprehensive review of impedance reshaping methods for the grid-following and grid-forming inverters. Firstly, it
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PLL phase margin design and analysis for mitigating sub/super
Two oscillation modes of the grid-connected inverter under weak grid are analyzed. A Lyapunov theorem-based parameter design method is proposed for PLL. A phase margin
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Analysis and Suppression of Medium-High Frequency
A parameter design method based on PLL bandwidth adjustment is proposed, providing theoretical foundations and practical guidance for suppressing medium-high frequency
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Understanding a Type of Forced Oscillation in Grid-Forming and Grid
To analyze this phenomenon, the article first examines the power characteristics of the interharmonics injected by MPPT and leverages this understanding to develop a P-ω
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Stability analysis of distributed generation grid
The research object of this paper is the three-phase inverter, and the harmonic impedance linearisation method is used to establish the output impedance
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Real-World Subsynchronous Oscillation Events in Power
58 oscillation events were reported in North China with oscillation frequency of 6-9 Hz. The oscillations occurred due to interaction between type-3 WPPs and 500-kV double circuit series
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Oscillation Risks of Grid-Following and Grid-Forming Inverter
Potential interactions between the series compensation and the IBR have been identified for both types: grid-following (GFL) or grid-forming (GFM). The study begins with electromagnetic
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PLL phase margin design and analysis for mitigating sub/super
Request PDF | On Sep 1, 2023, Gaoxiang Li and others published PLL phase margin design and analysis for mitigating sub/super-synchronous oscillation of grid-connected inverter under
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Enhanced active damping control with phase compensation for
Grid-connected inverters are crucial interfaces in renewable energy power systems. However, with the continuous increase in the penetration of renewable energy
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Analysis and Suppression of Medium-High Frequency Oscillations in Grid
A parameter design method based on PLL bandwidth adjustment is proposed, providing theoretical foundations and practical guidance for suppressing medium-high frequency
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A Modified Grid-Connected Inverter Topology for Power Oscillation
At present, the main methods to eliminate the output power oscillation of grid-connected inverter under unbalanced grid voltage can be divided into two categories: the first
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Analysis and Suppression of Medium-High Frequency Oscillations in Grid
Focusing on the 125Hz medium-high frequency oscillation issues observed in renewable energy power stations, this study investigates the influence of phase-locked loop (PLL) coefficients on
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Oscillation Risks of Grid-Following and Grid-Forming Inverter
Abstract—This paper investigates the dynamic behavior of a grid-connected inverter-based resource (IBR) when connected radially to a series compensated line. Potential interactions
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Forced oscillation in hybrid system with grid-following and grid
The key parameters influencing FOs in GFM converters and their impact patterns are analyzed. This paper identifies a new oscillation phenomenon in hybrid systems composed
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Stability Comparison of Grid-Connected Inverters
Under the background of high permeability, voltage feedforward control may further weaken the stability of grid-connected inverter (GCI)
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Small-Signal Modeling and Analysis of Grid-Connected Inverter
In this paper, the small-signal models of grid-connected inverter with both the droop control and the power differential droop control are established. The eigenvalues of these
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Stability analysis of distributed generation grid-connected inverter
The research object of this paper is the three-phase inverter, and the harmonic impedance linearisation method is used to establish the output impedance model of grid-connected
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Low-Frequency Oscillation Analysis of Grid-Connected VSG
Focusing on the factors influencing the low-frequency oscillation of a grid-connected VSG system, this study considers an inverter power supply based on virtual inertia
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Enhanced active damping control with phase compensation for
This method is particularly suitable for grid-connected inverter applications, including renewable energy systems, microgrids, and weak grid conditions, where high
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A Unified Method of Frequency Oscillation Characteristic Analysis for
This paper addresses the frequency oscillation problem in a parallel-inverter-based grid-connected system. Angular frequency interactions between inverters and the grid exhibit
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