DESIGN AND SIMULATION OF BOOST CONVERTERS SUITABLE FOR PHOTO VOLTAIC APPLICATIONS

Abstract

The main purpose of this paper is to design dc-dc boost converters which are required for a multi-level inverter circuit, to boost the output voltage of photovoltaic module to a suitable value. The output voltage of photo voltaic module is low and also fluctuating in nature. A boost converter is required to get a higher and stabilized dc output voltage. In this paper three voltage fed-back boost converters are designed and modelled using state space averaging technique (SSA).The output of the converter is measured and compared with a reference voltage to generate an error signal which is used to vary the duty cycle of the pulse width modulated signal from the controller with the help of SSA technique. The Simulation studies has been carried out for both open loop and closed loop with the circuits operating in continuous conduction mode with 27V, 54V, 78V output voltages, by considering 12V input voltage and 100 kHz switching frequency using matlab/Simulink software. The simulation results establish that the proposed design is capable to produce constant output voltages for variable input voltage and variable load.