Power Quality Improvement in Grid Connected PV System using Reduced Part Count Multilevel Inverter by Performing Power Balance

The multilevel inverters are playing a very important role in renewable energy, by increasing the renewable energies efficiency and improving the quality of the output power. Photo voltaic cells generates the electric power depending upon the sun light. Temperature and irradiation play an important role in generating the power. The irradiation on the cells is not same in MLIs, the duty cycle is varied to achieve maximum power, this can lead to voltage and current distortion. In this paper to overcome this issue a MLI topology is used in which a normal H-bridge is replaced by H6 bridge. The H6 bridge helps for achieving the same duty cycle at PV panels and improvement of output voltage and current. For testing purpose of the proposed topology simulation is carried out for the 7 levels with one PV arrays and a DC voltage source. The simulation is done using MATLAB.