MPPT BASED SOLAR BUCK BOOST INVERTER SENIOR DESIGN PROJECT REPORT

Abstract

Nowadays electricity becomes the major need. If we look our surroundings we found our economy relies on electricity, including industrial Sector. The electricity plays a vital role to run Industries. There are many ways of generating Electricity like Hydropower stations are there which generates electricity through water. Second one is Wind Energy Systems from which electricity is generated through wind. The Plants of Wind Energy systems are installed in a wide and open area. We see in last decade there is a boom in solar energy for the generation of electricity which is cheaper and can be installed easily.

Solar panels have millions of solar cells which converts the sunlight into electricity to run our household appliances. Solar panels are also known as photovoltaic cells. We are also making Solar-based project using MPPT technique.

In this project we have designed and developed MPPT (maximum power point tracking) frequency ranging from 20Hz to 80Hz and inverter using Microcontroller which converts DC input to AC output e.g. 12 volts DC voltage to 220 AC voltages approx. with the frequency of 50Hz.

Solar panels are connected with MPPT which generates the P.W.M. signal (usually Square Wave)which is connected as a input to the controller which gives the 4 sinusoidal waves which then connects with the inverter to gain the real output of 220V.we are using ATMEGA 32 as a microcontroller which is used for the pulse generation. The input of Atmega 32 will the output of MPPT, and then the H-Bridges connected at the output pins of the controller. The H-bridge circuit consist of Mosfet driver combinations which produces the output in the form square wave pulses which will become the input of the Transformer that converts DC square pulse into Ac sinusoidal pulses output. The transformer that we have used in our project is basically center taped transformer three input pins at the primary side and two output pins at the secondary side.