Modified Nine-Switches High Step-up Ratio Boost-Only Y-inverter with Common Ground

The article proposes a modified nine-switches high step-up ratio boost-only Y-inverter with common ground. This new inverter inherits the major advantages of the double dual topology and Y-inverter, and the circuit is modified so that both input and output are common-grounded, which ensures high voltage gain in three-phase systems. Meanwhile, the circuit topology reduces three switches, without increasing voltage stress, magnetic volume, or reducing voltage gain. Eventually, a double-loop control scheme in which input current and output voltage are used as control variables is designed here for the proposed Y-inverter. The feasibility is confirmed by Simulink simulation, which has provided a basis for future research.