Analysis and simulation three phases of Z source inverter

Nur Saiyidah , Anas (2014) Analysis and simulation three phases of Z source inverter. Project Report. UTeM. (Submitted)

Text ANALYSIS AND SIMULATION OF THREE PHASES Z SOURCE INVERTER 24pages.pdf Download (1MB)

Abstract

This project involves on the analysis and simulation of three phases Z Source Inverter (ZSI). The application of ZSI is widely used in industry such as photovoltaic, general motor drive and fuel cell. The new power inverter have been introduced to overcome the problem in conventional inverter which is has some limitation in term of boosting voltage. Inverter consists of two types of conventional inverter known as Voltage Source Inverter (VSI) and Current Source Inverter (CSI). However, both inverters are having some limitations. The limitation of the inverter is cannot fully utilize the available DC link voltage to enhance output voltage. The maximum output voltage at modulation index, 1.0 using Sinusoidal Pulse Width Modulation (SPWM) technique is limited at half of the DC link voltage. Besides that, the output voltage of conventional inverter is lower or equal than desired voltage. In other word, the voltage drop is higher compared with ZSI by using conventional inverter. The main purpose of this project is to analyze the performance of total harmonic distortion and maximum output voltage for various modulation indexes by using MATLAB software. This project is more focuses on Simple Boost technique and the sequence of this project begin with derive the equation. In order to control the output voltage is greater than input, boost factor had been implemented by varying modulation index. The simple boost switching circuit is designed to allow shoot through occur. The modulation index of simple boost is depending on upper voltage (Vp) and lower voltage (Vn). By comparing the modulation index, 0.8 between simple boost and SPWM, it shows that improvement about 67.24 %. Even though the modulation index of simple boost is low than SPWM, the capability of boosting output voltage by using simple boost is more effective.

Actions (login required)

View Item