Modelling and control of a novel hybrid multilevel inverter for photovoltaic integration.

D. Tech. Electrical Engineering.Aims to : 1. Derive the analytical solutions for describing the spectral characteristics of multicarrier based multilevel PWM inverter using double Fourier transform. 2. To carry out a comprehensive modelling of a cascaded NPC/H-bridge for PV-Grid application. 3. To integrate the Cascaded NPC/H-bridge inverter, grid and PV model and analyze the power flow characteristics for varying PV source current and voltage. Detailed analysis of PV and development of MPPT algorithm are not part of this thesis. 4. To develop a novel hybrid phase shifted PWM control algorithm and test its superior harmonic suppression in MATLAB simulation. 5. To compare the developed control algorithm with conventional multicarrier approach in terms of harmonic suppression and component count 6. To develop a control scheme that is capable of injecting maximum power into the grid from the model at different environmental conditions. 7. To explore and develop analytical tools for DC- link voltage control of the model. 8. To design and built a scaled down. 9 Level cascaded NPC/H-bridge inverter for grid connected application