Design and Construction of an Inverter for a Photovoltaic System

Abstract

Work presented in this article aims to study and realize static converter. 12V DC / 220V AC. This last took us to realize two converters at the same time. The first stage of the conversion is a fly back type chopper (buck-boost) powered by a photovoltaic panel using the TL494 which generates us a PWM signal for the control of the two transistors used which allowed us to have voltage of 311V adjustable with control loop that holds the constant tension whatever the influences of temperature and sunshine. This chopper feeds the second stage which is a DC / AC converter in MOSFET Transistor Bridge, each arm of the inverter is controlled by a power driver type IR2110 which transmits the microcontroller PWM control (16F877A) to the MOSFET. The latter provides a quasi-sinusoidal signal with a voltage of 220 V and a frequency of 50 Hz usable in everyday life.