Grid-connected inverters as an important interface for distributed generation and necessary equipment for power quality management, such as new energy grid-connected inverters , active power filter (APF) , and Static Var Generator (SVG) , etc., play a crucial role in the construction of the smart grid.
However, in the weak grid case, the grid voltage feedforward control introduces an additional feedback loop related to the grid impedance, which drastically reduces the phase angle margin of the grid-connected inverter and poses a serious threat to the quality and stability of the grid-connected current of the grid-connected inverter.
This dependency leads to fluctuations in power output and potential grid instability. Grid-connected inverters (GCIs) have emerged as a critical technology addressing these challenges. GCIs convert variable direct current (DC) power from renewable sources into alternating current (AC) power suitable for grid consumption .
Firstly, the control system is modeled and secondly, a band-pass filter is added into the grid voltage feedforward channel to perform impedance reshaping of the system to improve the robustness of the inverter against grid impedance variations.
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Article Open access Published: 07 March 2025 Enhancement of power quality in grid-connected systems using a predictive direct power controlled based PV-interfaced with …
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In weak grid, feedforward of grid voltage control is widely used to effectively suppress grid-side current distortion of inverters caused by harmonics in point of common …
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In the experiments, the peak current control (PCC) method is applied to control both the active and reactive power injected into the grid by the modified 17-levels grid-connected …
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Arithmetic optimization algorithm based maximum power point tracking for grid-connected photovoltaic system Article Open access 12 April 2023
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This study investigates a transformerless grid‐connected H‐bridge neutral point clamped inverter, focusing on leakage current reduction.
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