A New Boost Topology Seven-Level Inverter of High Voltage Gain Ability and Continuous Input Current With MPPT for PV Grid Integration

Abstract

This paper proposes a single-dc-source, seven-level (7L) inverter scheme with a dynamic voltage gain for solar applications. The proposed circuit is created by joining the two DC-DC boost converters in series for discharging and parallel for charging. The finite set model predictive controller is used to deliver the maximum power to the load. Additional details are provided regarding the mathematical expression of volt-ampere balances. The benefits of the proposed topology over current PV inverters are stressed, proving its superiority. Through experimental validation using a lab hardware setup, an improvement in power quality and efficiency of 96.7% is guaranteed. The empirical results are demonstrated by a number of variables, including load fluctuation, modulation index variation, etc.

Keywords

• Boost
• double-stage
• grid-connected
• inverter
• high-voltage gain