The power electronics device which converts DC power to AC power at required output voltage and frequency level is known as inverter. As we have found that different inverters are used for different equipment’s so in our project titled “ Analysis of Harmonics injected by Single phase Inverter” , we are analyzing the harmonics present in single phase voltage source inverter using different loads (R,RL and RLC).
We are analyzing Harmonics using MATLAB tools like Scope for harmonics and Simulink powergui for analysis of FFT of different Signals.
Table of Contents
Chapter 1 Introduction
Software Used
Single Phase Voltage Inverter
Single Phase Half Bridge Inverter
Single Phase Full Bridge Inverter
Chapter 2 Analysis of Single Phase Inverter
1. Analysis of Single Phase Half Bridge Inverter with R load
Single Phase Inverter Half Bridge with RL load
Single Phase Inverter Half Bridge with RLC Load
2. Analysis of Single Phase Full- Wave Inverter with R load
Single Phase Inverter Half Wave with RL load
Single Phase Inverter Half Wave with RLC load
Chapter 3 Results
1. FFT Analysis of Single Phase Half Bridge Inverter with R load
Single Phase Inverter Half Bridge with RL load
Single Phase Inverter Half Bridge with RLC Load
2. FFT Analysis of Single Phase Full- Wave Inverter with R load
Single Phase Inverter Half Wave with RL load
Single Phase Inverter Half Wave with RLC load
Chapter 4 Conclusion
Chapter 5 Further Scope
Objectives and Topics
This project aims to analyze the harmonic components generated by single-phase voltage source inverters when operating with various electrical loads. By utilizing simulation tools, the study explores how different switching configurations and load types affect the quality of the output power waveform.
- Harmonic analysis in power electronics
- Single-phase half-bridge and full-bridge inverter topologies
- Comparative study of R, RL, and RLC load behaviors
- Simulation and FFT analysis using MATLAB Simulink
- Impact of switching action on output power quality
Excerpt from the Book
Introduction
A Circuit that converts dc power into ac power at desired output voltage and frequency is called an inverter. Some industrial applications of inverters are for adjustable-speed ac drives, induction heating, stand by air-craft power supplies, UPS (uninterruptible power supplies).
The dc power input to the inverter is obtained from an existing power supply network or from a rotating alternator through a rectifier or a battery, fuel cell, photovoltaic array or magnetic hydrodynamic generator. The rectification is carried out by standard diodes or thyristor converter circuits.
Inverters can be broadly classified into two types:
Voltage Source Inverters dc source has small or negligible internal impedance.
Current Source Inverters adjustable current from a dc source of high internal impedance.
From the viewpoint of connection of semiconductor devices, inverters are classified as under:
Bridge inverters.
Series inverters.
Parallel inverters.
Harmonics: A harmonic of a wave is a component frequency of the signal that is an integer multiple of the fundamental frequency, i.e. if the fundamental frequency is f, the harmonics have frequencies 2f, 3f, 4f, . . . etc. The harmonics have the property that they are all periodic at the fundamental frequency, therefore the sum of harmonics is also periodic at that frequency.
Summary of Chapters
Chapter 1 Introduction: Provides fundamental definitions of inverters, their industrial applications, classification methods, and the basic theory regarding harmonic generation.
Chapter 2 Analysis of Single Phase Inverter: Details the simulation setup and configuration for half-bridge and full-bridge inverters under different resistive, inductive, and capacitive loading conditions.
Chapter 3 Results: Presents the Fast Fourier Transform (FFT) analysis of the generated signals to quantify harmonic content under the various investigated circuit configurations.
Chapter 4 Conclusion: Summarizes the study's findings, highlighting that lower-order harmonics are more prominent in inverter outputs due to the semiconductor switching actions.
Chapter 5 Further Scope: Discusses the necessity of adhering to power quality standards and suggests investigating advanced switching schemes to mitigate harmonic injection.
Keywords
Inverter, Harmonics, MATLAB, Simulink, IGBT, FFT, Power Quality, Half-bridge Inverter, Full-bridge Inverter, R load, RL load, RLC load, Switching, Semiconductor, Frequency.
Frequently Asked Questions
What is the primary focus of this project?
The project focuses on analyzing harmonics generated by single-phase voltage source inverters when subjected to different load types.
What are the central topics covered?
The central topics include inverter topology classification, the impact of switching actions on waveforms, and harmonic content analysis.
What is the research objective?
The objective is to quantify and analyze the harmonics present in single-phase inverters to understand their impact on power quality.
Which scientific method is employed?
The research uses computational simulation, specifically leveraging MATLAB Simulink and its FFT analysis tools to study inverter performance.
What is covered in the main body?
The main body details the design and simulation of half-bridge and full-bridge inverters with R, RL, and RLC loads, followed by a graphical FFT analysis of these circuits.
Which keywords best characterize this work?
The work is characterized by terms such as Inverter, Harmonics, MATLAB, Simulink, IGBT, and Power Quality.
Why are RLC loads used in this study?
RLC loads are used to simulate more realistic and complex industrial equipment conditions to see how various impedance combinations affect harmonic distortion.
How does the choice of inverter topology affect harmonic output?
The study demonstrates that different topologies (half-bridge vs. full-bridge) result in varying output signal characteristics, with lower-order harmonics being dominant in both.
- Quote paper
- Chayan Mehta (Author), Arpita Singh (Author), Rahul Lohiya (Author), Surabhi Bhattacharya (Author), 2013, Analysis of Harmonics Injected by Single Phase Inverter, Munich, GRIN Verlag, https://www.hausarbeiten.de/document/265312
