This paper addresses the high-frequency oscillations in grid-connected systems caused by filter and delay characteristics, by proposing an enhanced grid-connected current
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When the grid voltage is asymmetrical, the current at the point of common coupling (PCC) will contain negative sequence components, and the reactive power and active power
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The grid-connected inverters may experience excessive current stress in case of unbalanced grid voltage Fault Ride Through (FRT), which significantly affects the reliability of
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This paper identifies a new oscillation phenomenon in hybrid systems composed of grid-following (GFL) and grid-forming (GFM) inverters. Different from
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Abstract:Under unbalanced grid voltage faults, the output power oscillation of a grid-connected inverter is an urgent problem to be solved. In the traditional topology of inverters, it
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To solve this problem, this study proposes a control strategy for PV grid-connected inverters based on the model predictive control (MPC) algorithm. Based on the MPC algorithm
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The operation of grid-tied single-phase inverters generates oscillations in its DC link voltage. If only active/reactive power is controlled by the inverter, this oscillation is at twice the
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This article investigates a novel oscillation phenomenon in systems with grid-forming (GFM) and grid-following (GFL) inverters. Unlike previous studies that primarily focus on small
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Under weak grid, the grid-connected inverter can easily cause sub/super-synchronous oscillations, which are determined by the oscillation modes of system. Firstly,
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For the grid-connected inverter system, the sustained constant-amplitude oscillations often occur. At this time, the grid-connected current undergoes oscillation, and the
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To solve this problem, this study proposes a control strategy for PV grid-connected inverters based on the model predictive control (MPC) algorithm. Based on the MPC algorithm
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Under unbalanced grid voltage faults, the output power oscillation of a grid-connected inverter is an urgent problem to be solved. In the traditional topology of inverters, it
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The grid-connected inverters may experience excessive current stress in case of unbalanced grid voltage Fault Ride Through
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This paper provides a comprehensive review of impedance reshaping methods for the grid-following and grid-forming inverters. Firstly, it describes the phenomenon and
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As the primary interface for integrating renewable energy sources such as wind and solar power into the grid, inverters are prone to inducing sub-/super-synchronous or medium
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The issue of low-frequency oscillation (LFO) becomes more prominent when considering the phase-locked loop (PLL) impact of grid-connected inverter (GC
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comprehensive control algorithm to limit the inverter peak current and achieve zero active power oscillation for the grid-connected PV power plant (GCPVPP) during unbalanced
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To solve this problem, this study proposes a control strategy for PV grid-connected inverters based on the model predictive control
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As the penetration of renewable energy increases year by year, the risk of high-frequency oscillation instability increases when a
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With the increasing penetration of inverter-based resources (IBRs), SSOs have become a major concern for grid stability. Commonly occur in systems with series
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Based on the established sequence impedance models and Nyquist criterion, the paper identifies the reasons behind sub/supersynchronous oscillations induced by dual PI
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