International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 02 Issue: 09 | Dec-2015 www.irjet.net p-ISSN: 2395-0072 © 2015, IRJET ISO 9001:2008 Certified Journal Page 2225 SIMULATION AND MODELING OF SINGLE PHASE DC-AC CONVERTER OF SOLAR INVERTER Maulik Dave 1 , Prof. Sanjay R. Vyas 2 1 M.E. scholar, Electrical engineering department, LDRP-ITR, Gandhinagar, Gujarat, India 2 Professor at Electrical engineering department, LDRP-ITR, Gandhinagar, Gujarat, India ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract - This paper is depicts information about dc-ac inverter used in solar inverter. We will get DC power from solar panels and this converter inverts DC to AC. This design and modulation is based on MATLAB software. In circuit, for switching purpose IGBT is used. There are many other devices also but IGBT has more advantages than others which are shown by comparison with others. The main thing is that this conversion and switching of IGBT is done using different types of PWM methods. Here we are using SPWM method for conversion of AC power. This method is very efficient than other methods and also it reduces harmonics to very much extent in output. Project objective are, to design an inverter model by using MATLAB and making analysis on the output voltage and to study the function of PWM in single phase inverter. Project scope are, 1. Modeling and simulation using MATLAB. 2. Using PWM method for the switching operation. Project application: This Project is based on solar inverter, this inverter will be used in our college for lab applications. Key Words: Single phase DC-AC converter, IGBT, MATLAB, SPWM method, harmonic reduction, etc. 1. INTRODUCTION Presently world is facing too much challenges one of them is to generating the enough electrical power that will fulfil the requirements of mankind. Today generation of electrical power based on the conventional coal, gas and nuclear based. World population is increasing day by day so the requirement of them also increased and hence generation of electrical power is also increased. Basically there are two types of power generation sources: 1. Conventional 2. Nonconventional. Today most of generation of electrical power based on Conventional sources such as coal, gas and nuclear etc. Conventional sources are no more after some of the years and which are not sufficient to fulfill the requirement of the mankind. Nuclear energy is not much preferable because its radiation effect. Therefore some part of energy should be generated based on non-conventional sources. There are also problems of increasing pollution and energy demands and hence the exploitation of solar has received more and more attentions. This project is also focus on modeling and simulation of single phase solar inverter by Pulse Width Modulation. Pulse Width Modulation is a technique that use as a way to decrease total harmonic distortion in inverter circuit. The model is implemented using MATLAB software with the SIMPOWER SYSTEM block set based on computer simulation. Computer simulation plays an important role in the design, analysis, and evaluation of power electronic converter and their controller. MATLAB is an effective tool to analyze a PWM inverter. Advantages of using MATLAB are the following: 1. faster response 2. Availability of various simulation tools 3. Various functional blocks, etc.