Design and Simulation of DC-DC Converters for Photovoltaic System

Abstract

The importance of solar energy for future energy supply has been growing vigorously with the growing concerns about the price and availability of fossil fuels. Renewable energy sources such as solar energy has received tremendous demands since it is pollution-free from any poisonous byproducts that can pollute the environment. DC-DC converters are widely used in renewable energy generation systems that is in solar photovoltaic (PV) system. The basic PV system consists of PV panels, electric converter. The output power from the PV module or array depends upon the irradiance and temperature which are constantly varying. Therefore for these purpose we can use the converters. The converters transmits the power from PV to the load should have higher efficiency. The main advantage of the converter is that this are provide a regulated output. And this DC-DC converter are mainly designed to meet specific demand of DC loads. Therefore, a DC-DC converter are used to produce a constant voltage and deliver maximum power from PV panel to the load. We will use the converters based on MOSFETs switches.

The main objective of dissertation is 1) to design and simulate the various DC-DC converters, 2) to obtain the stable voltage of DC-DC converters and to compare their performance and 3) selection of suitable DC-DC converters for Photovoltaic System. This dissertation presents simulation and designing of PV array connected to load through DC-DC converter such as Boost converter, Cascaded Buck-Boost converter, Cuk and Single ended primary inductance converter (SEPIC) etc. are modeled in MATLAB and their results are compared.