Obvious resonance peak will be generated when parallel photovoltaic grid-connected inverters are connected to the weak grid with high grid impedance, which seriously affects the stability of grid-connected operation of the photovoltaic system. First, the equivalent circuit model of the multi-inverter parallel system is established, and the mechanism of. . The current inverter control strategies have limitations in suppressing grid resonance, especially in complex grid environments with high penetration of renewable energy sources. These strate-gies often focus on suppressing resonance at a single frequency point, but their effectiveness is. . resonance, paralleled connection of multiple inverters, LCL filter, weak grid Under weak grid conditions, the system generates resonance due to the coupling between parallel inverters and between inverters and the grid. Resonance suppression of the PV grid-connected parallel inverter in weak grid 4.
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