Performance analysis of a nonlinear MPPT controller using three-phase three-level NPC inverter

In this paper, a three-phase load connected to an NPC three-level inverter is presented. To generate gate signals for the inverter, the space vector pulse width modulation (SVPWM) is used. DC supply is provided by photovoltaic cells. Boost converter controls the power transfer from photovoltaic generator. Due to nonlinear I-V characteristics of photovoltaic cells, a maximum power point tracking algorithm is adopted to maximize the output power, the nonlinear controller (sliding mode) is used. These controllers are compared with the conventional duty cycle of perturb and observe (P&O) control method. Matlab-simulink is used for simulation, analysis and interpretation of the results of these controllers.