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Multiple low frequency dual reference PWM control of a grid connected photovoltaic three phase NPC inverter with DC/DC boost converter

Mechouma Rabiaa (University of Batna, LEB, Department of Electrical Engineering, Batna, Algeria)
Azoui Boubekeur (University of Batna, LEB, Department of Electrical Engineering, Batna, Algeria)

In recent years, power demand of industrial applications has increased significantly reaching some megawatts. The use of multilevel converters for applications of medium and high powers is proposed as a solution to drawback semiconductor technology. A multilevel converter not only achieves high power ratings, but also enables the use of renewable energy sources. Renewable energy sources such as photovoltaic can be easily interfaced to a multilevel converter system for a high power application. This paper presents the simulation study in Matlab/Simulink of a grid connected photovoltaic three phase Neutral Point Clamped (NPC) inverter with DC/DC boost converter for constant and variable solar radiation.

Keywords: grid-connected PV systems, multi level inverter, multiple low frequency PWM, LCL filter, MPPT controller