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Design and implementation of a new multilevel DC -link three-phase T-type inverter / Saddam Shueai Hussein Al-Namer

Multilevel inverters are widely used in industrial applications due to its ability to provide an output signal with low harmonic distortion and superior output voltages. In fact, the low harmonic distortion and high efficiency can be achieved further by increasing the number of voltage levels which...

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Main Author: Saddam Shueai , Hussein Al-Namer
Format: Thesis
Published: 2019
Subjects:
TK Electrical engineering. Electronics Nuclear engineering
Online Access:http://studentsrepo.um.edu.my/11127/2/Saddam.pdf
http://studentsrepo.um.edu.my/11127/1/Saddam_Shueai.pdf
http://studentsrepo.um.edu.my/11127/
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spelling my.um.stud.111272020-03-25T03:28:14Z Design and implementation of a new multilevel DC -link three-phase T-type inverter / Saddam Shueai Hussein Al-Namer Saddam Shueai , Hussein Al-Namer TK Electrical engineering. Electronics Nuclear engineering Multilevel inverters are widely used in industrial applications due to its ability to provide an output signal with low harmonic distortion and superior output voltages. In fact, the low harmonic distortion and high efficiency can be achieved further by increasing the number of voltage levels which might increase the total cost of the systems especially for the complex topologies such as CHB, flying capacitors, and NPC. For a high and medium power application, the voltage stresses across the components are the drawbacks of these inverters. This work proposes (i) a four-level topology for T-type inverters that can be extended to the N-level using unequal voltage sources DC-link, (ii) a new N-multilevel topologies for T-type inverter with reduced number of components in which those topologies constitute the single bridge legs with the shape of the rotated character “T” and (iii) a variable direct current-link circuit, and (iv) a new four-level T-type neutral point piloted (T-NPP) topology with higher efficiency and low THD and with the ability to withstand high voltage stresses, especially for high-power applications. The proposed topologies are designed in such a manner that the dc-voltage stresses split over the components with strong possibilities to increase the load current and switching frequency. Furthermore, the optimized staircase modulation technique is used to generate superior output voltage waveforms. However, the proposed topologies outperform other converters by the high number of output voltage level, low number of components, simple structure and higher efficiency in which four-level T-type inverter reaches to maximum output power 2.250 kW with maximum efficiency equals to 95.38%, conduction and switching losses equal 35.635W, 0.6972 W respectively for each leg. The feasibility of the proposed topologies was validated via theoretical analysis, simulation, and experiments where the prototype was built and used to operate static resistive-inductive (R-L) and dynamic (induction motor) loads. 2019-07 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/11127/2/Saddam.pdf application/pdf http://studentsrepo.um.edu.my/11127/1/Saddam_Shueai.pdf Saddam Shueai , Hussein Al-Namer (2019) Design and implementation of a new multilevel DC -link three-phase T-type inverter / Saddam Shueai Hussein Al-Namer. PhD thesis, University of Malaya. http://studentsrepo.um.edu.my/11127/
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Student Repository
url_provider http://studentsrepo.um.edu.my/
topic TK Electrical engineering. Electronics Nuclear engineering
spellingShingle TK Electrical engineering. Electronics Nuclear engineering
Saddam Shueai , Hussein Al-Namer
Design and implementation of a new multilevel DC -link three-phase T-type inverter / Saddam Shueai Hussein Al-Namer
description Multilevel inverters are widely used in industrial applications due to its ability to provide an output signal with low harmonic distortion and superior output voltages. In fact, the low harmonic distortion and high efficiency can be achieved further by increasing the number of voltage levels which might increase the total cost of the systems especially for the complex topologies such as CHB, flying capacitors, and NPC. For a high and medium power application, the voltage stresses across the components are the drawbacks of these inverters. This work proposes (i) a four-level topology for T-type inverters that can be extended to the N-level using unequal voltage sources DC-link, (ii) a new N-multilevel topologies for T-type inverter with reduced number of components in which those topologies constitute the single bridge legs with the shape of the rotated character “T” and (iii) a variable direct current-link circuit, and (iv) a new four-level T-type neutral point piloted (T-NPP) topology with higher efficiency and low THD and with the ability to withstand high voltage stresses, especially for high-power applications. The proposed topologies are designed in such a manner that the dc-voltage stresses split over the components with strong possibilities to increase the load current and switching frequency. Furthermore, the optimized staircase modulation technique is used to generate superior output voltage waveforms. However, the proposed topologies outperform other converters by the high number of output voltage level, low number of components, simple structure and higher efficiency in which four-level T-type inverter reaches to maximum output power 2.250 kW with maximum efficiency equals to 95.38%, conduction and switching losses equal 35.635W, 0.6972 W respectively for each leg. The feasibility of the proposed topologies was validated via theoretical analysis, simulation, and experiments where the prototype was built and used to operate static resistive-inductive (R-L) and dynamic (induction motor) loads.
format Thesis
author Saddam Shueai , Hussein Al-Namer
author_facet Saddam Shueai , Hussein Al-Namer
author_sort Saddam Shueai , Hussein Al-Namer
title Design and implementation of a new multilevel DC -link three-phase T-type inverter / Saddam Shueai Hussein Al-Namer
title_short Design and implementation of a new multilevel DC -link three-phase T-type inverter / Saddam Shueai Hussein Al-Namer
title_full Design and implementation of a new multilevel DC -link three-phase T-type inverter / Saddam Shueai Hussein Al-Namer
title_fullStr Design and implementation of a new multilevel DC -link three-phase T-type inverter / Saddam Shueai Hussein Al-Namer
title_full_unstemmed Design and implementation of a new multilevel DC -link three-phase T-type inverter / Saddam Shueai Hussein Al-Namer
title_sort design and implementation of a new multilevel dc -link three-phase t-type inverter / saddam shueai hussein al-namer
publishDate 2019
url http://studentsrepo.um.edu.my/11127/2/Saddam.pdf
http://studentsrepo.um.edu.my/11127/1/Saddam_Shueai.pdf
http://studentsrepo.um.edu.my/11127/
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score 13.223943

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