Comparison and simulation of two new schemes in solar inverters for Harmonic reduction

In this paper, analysis and comparison of two approaches is done for dc to ac power conversion. First approach uses cascaded H-Bridge Inverter and second uses new Multi-level Scheme having Level Modules, H-Bridge and PV Arrays as dc source. The simulation is done in SIMULINK/ MATLAB Software. The Total Harmonic Distortion in output load voltage, Active Power and Reactive Power produced by both the approaches are compared. It is shown that in second scheme, spikes occur in output voltage due to the spikes generated in output voltage of PV Array. These spikes and hence THD are reduced by inserting capacitors across the PV Array. It is shown that THD produced in second scheme is better up to a certain stages. The available active and reactive powers are also larger for the second scheme.