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For the harmonic resonance problem of the photovoltaic multi-inverter parallel grid-connected system, this paper mainly analyzes the resonant characteristics of the LCL interface circuit. The model of the LCL interface circuit is given, and with the increase of grid-connected inverter number, the resonant characteristics are analyzed respectively which the circuit system is stimulated by the harmonic...
Nowadays, hybrid cascade multilevel technology has attracted a increasing concern, especially in moderate-voltage and high-power applications. In this paper, a design method about how to design main circuits of active power filters(APF) with hybrid cascade multilevel structure is proposed. Through careful research, the combination of these cascade multilevel H-bridge modules is properly chosen and...
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