A PV cell Fed Three Phase Switched capacitor based 17 Level Inverter Using Multiple DC-Link

Abstract

In this project, we are using multilevel inverter by using switching capacitor for PV grid. Now a day’s multilevel inverters have become more popular over the years in electric high-power application with the promise of less disturbances and the possibility to function at lower switching frequencies than ordinary two-level inverters. So by cascading multilevel inverter the output voltage will be increases. By using multilevel inverter, the cost will be less. It will be required less space. Modulation strategies, component comparison and solutions to the multilevel voltage source balancing problem will also be presented in this work. By using the multilevel inverter, we can reduce the total harmonic distraction compare to the other sources in PV grid for DC to AC converter. Switched-capacitor multilevel inverters (SCMLIs) are known as another alternative which do not need the charge balancing operations for eliminating the extra dc power supplies and as a result reducing the overall cost.The commutation of the switches provides the addition of the capacitor voltages, thus reaching high voltage at the output, while the power devices must withstand only reduced voltages. These multilevel inverters (MLI) have become an effective solution for increasing power and reducing harmonics.