Selective harmonic elimination for a PV based Quasi — Z Source Inverter for drive systems

This paper deals with simulation analysis of Selective Harmonic Elimination (SHE) for PV operated Quasi Impedance Source Inverter (q-ZSI) drive system. Electricity generation using Photovoltaic cells is a promising form of sustainable energy. A quasi-Z source inverter (q-ZSI) can minimize the power fluctuations from the electric energy generated by a PV panel. In the existing system, during the discharge of energy stored battery Harmonic Distortion is more. The proposed topology describes an improved ability to compensate power while maintaining a constant dc-link peak voltage with minimum harmonics. It is promising to note that the THD level decreases significantly with the introduction of a closed loop controller with Selective Harmonic Elimination technique. Thus the proposed system provides an efficient means of PV power generation.