Implementation of nearest level control method for single-phase transistor-clamped H-bridge multilevel inverter

Multilevel Inverters (MLIs) are gaining particular interest among researchers and in the industrial sector owing to their widespread applications and numerous features. Transistor-Clamped H-Bridge (TCHB) MLI has received increasing research attention due to its advantage in producing high-quality ou...

Full description

Saved in:

Bibliographic Details
Main Author:	Saleh, Wail Ali Ali
Format:	Thesis
Language:	English English
Published:	2021
Subjects:	T Technology (General)
Online Access:	http://eprints.utem.edu.my/id/eprint/25991/1/Implementation%20of%20nearest%20level%20control%20method%20for%20single-phase%20transistor-clamped%20H-bridge%20multilevel%20inverter.pdf http://eprints.utem.edu.my/id/eprint/25991/2/Implementation%20of%20nearest%20level%20control%20method%20for%20single-phase%20transistor-clamped%20H-bridge%20multilevel%20inverter.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utem-ep.25991
record_format	uketd_dc
spelling	my-utem-ep.259912022-09-29T12:20:14Z Implementation of nearest level control method for single-phase transistor-clamped H-bridge multilevel inverter 2021 Saleh, Wail Ali Ali T Technology (General) TK Electrical engineering. Electronics Nuclear engineering Multilevel Inverters (MLIs) are gaining particular interest among researchers and in the industrial sector owing to their widespread applications and numerous features. Transistor-Clamped H-Bridge (TCHB) MLI has received increasing research attention due to its advantage in producing high-quality output using a reduced number of switches and DC voltage sources compared with other conventional MLI topologies. With regard to the modulation technique, High Switching Frequency (HSF) modulations suffer from high switching losses, making them unsuitable for high-power applications. For such applications, Low Switching Frequency (LSF) modulations, such as Nearest Level Control (NLC), are more efficient as they operate at low frequency and thus reduce switching losses significantly. NLC is a simple method in its concept and implementation. The main aim of this study is to implement the proposed NLC method to a single-phase TCHB MLI with symmetrical and asymmetrical DC voltage sources and to evaluate its Total Harmonic Distortion (THD) minimization. Two topologies of the TCHB MLI are investigated in this study, which are nine-level symmetrical and thirteen-level asymmetrical TCHB inverters. Adopting an asymmetry for the DC voltage sources of the MLI results in a higher number of output levels. The selected voltage ratio of the DC sources in the asymmetrical topology is 1: 2. The adopted topologies and the proposed control method are modeled through simulations in Matlab/Simulink. The simulation results are verified through experimental tests using an Altera Field-Programmable Gate Array (FPGA). The results show that the topologies and the proposed control method are efficient in achieving high-quality output with an improved THD. The minimum voltage THDs obtained from the experiments are below 8.1 % for the nine-level inverter and below 5.3% for the thirteen-level inverter for different types of load, which almost comply with IEEE Standard 519-2014. The simulation results are in close agreement with the experimental ones. It is concluded that the NLC performs more efficiently for inverters with a higher number of levels and produces better THD results compared with other LSF modulations. 2021 Thesis http://eprints.utem.edu.my/id/eprint/25991/ http://eprints.utem.edu.my/id/eprint/25991/1/Implementation%20of%20nearest%20level%20control%20method%20for%20single-phase%20transistor-clamped%20H-bridge%20multilevel%20inverter.pdf text en public http://eprints.utem.edu.my/id/eprint/25991/2/Implementation%20of%20nearest%20level%20control%20method%20for%20single-phase%20transistor-clamped%20H-bridge%20multilevel%20inverter.pdf text en validuser https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=121219 mphil masters Universiti Teknikal Malaysia Melaka Faculty of Electrical Engineering Mohd Said, Nurul Ain
institution	Universiti Teknikal Malaysia Melaka
collection	UTeM Repository
language	English English
advisor	Mohd Said, Nurul Ain
topic	T Technology (General) T Technology (General)
spellingShingle	T Technology (General) T Technology (General) Saleh, Wail Ali Ali Implementation of nearest level control method for single-phase transistor-clamped H-bridge multilevel inverter
description	Multilevel Inverters (MLIs) are gaining particular interest among researchers and in the industrial sector owing to their widespread applications and numerous features. Transistor-Clamped H-Bridge (TCHB) MLI has received increasing research attention due to its advantage in producing high-quality output using a reduced number of switches and DC voltage sources compared with other conventional MLI topologies. With regard to the modulation technique, High Switching Frequency (HSF) modulations suffer from high switching losses, making them unsuitable for high-power applications. For such applications, Low Switching Frequency (LSF) modulations, such as Nearest Level Control (NLC), are more efficient as they operate at low frequency and thus reduce switching losses significantly. NLC is a simple method in its concept and implementation. The main aim of this study is to implement the proposed NLC method to a single-phase TCHB MLI with symmetrical and asymmetrical DC voltage sources and to evaluate its Total Harmonic Distortion (THD) minimization. Two topologies of the TCHB MLI are investigated in this study, which are nine-level symmetrical and thirteen-level asymmetrical TCHB inverters. Adopting an asymmetry for the DC voltage sources of the MLI results in a higher number of output levels. The selected voltage ratio of the DC sources in the asymmetrical topology is 1: 2. The adopted topologies and the proposed control method are modeled through simulations in Matlab/Simulink. The simulation results are verified through experimental tests using an Altera Field-Programmable Gate Array (FPGA). The results show that the topologies and the proposed control method are efficient in achieving high-quality output with an improved THD. The minimum voltage THDs obtained from the experiments are below 8.1 % for the nine-level inverter and below 5.3% for the thirteen-level inverter for different types of load, which almost comply with IEEE Standard 519-2014. The simulation results are in close agreement with the experimental ones. It is concluded that the NLC performs more efficiently for inverters with a higher number of levels and produces better THD results compared with other LSF modulations.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Saleh, Wail Ali Ali
author_facet	Saleh, Wail Ali Ali
author_sort	Saleh, Wail Ali Ali
title	Implementation of nearest level control method for single-phase transistor-clamped H-bridge multilevel inverter
title_short	Implementation of nearest level control method for single-phase transistor-clamped H-bridge multilevel inverter
title_full	Implementation of nearest level control method for single-phase transistor-clamped H-bridge multilevel inverter
title_fullStr	Implementation of nearest level control method for single-phase transistor-clamped H-bridge multilevel inverter
title_full_unstemmed	Implementation of nearest level control method for single-phase transistor-clamped H-bridge multilevel inverter
title_sort	implementation of nearest level control method for single-phase transistor-clamped h-bridge multilevel inverter
granting_institution	Universiti Teknikal Malaysia Melaka
granting_department	Faculty of Electrical Engineering
publishDate	2021
url	http://eprints.utem.edu.my/id/eprint/25991/1/Implementation%20of%20nearest%20level%20control%20method%20for%20single-phase%20transistor-clamped%20H-bridge%20multilevel%20inverter.pdf http://eprints.utem.edu.my/id/eprint/25991/2/Implementation%20of%20nearest%20level%20control%20method%20for%20single-phase%20transistor-clamped%20H-bridge%20multilevel%20inverter.pdf
_version_	1747834150198444032

Implementation of nearest level control method for single-phase transistor-clamped H-bridge multilevel inverter

Similar Items