Show simple item record

dc.contributor.supervisorAmbroze, Adrian
dc.contributor.authorAl-Bayaty, Hussein Kamal Anwer
dc.contributor.otherFaculty of Science and Engineeringen_US
dc.date.accessioned2018-01-23T11:58:31Z
dc.date.issued2018
dc.identifier10437801en_US
dc.identifier.urihttp://hdl.handle.net/10026.1/10646
dc.descriptionEdited version embargoed until 23.01.2019 Full version: Access restricted permanently due to 3rd party copyright restrictions. Restriction set on 23.01.2018 by SE, Doctoral College
dc.description.abstract

Firstly, this thesis investigates the electrical power harmonics in an attempt to utilize harmonic current and its distortion power in a novel idea to reconvert the distortion power into useful power. This is done, in order to feed different DC or AC loads in single and three-phase power system by using passive or active filters and accordingly, develop a new topology of hybrid active power filter (HAPF). In addition, this circuit can be considered as a power factor corrector (PFC) because it reduces the total harmonic distortion (THD) and improves the power factor (PF). Secondly, this thesis works on a new design of active power factor correction (APFC) circuit presenting two circuits with the same design principle: the first design consists of two active switches without an external complex control circuit, while the second design contains a single active switch with an additional control circuit. The main contribution of this circuit is 98% reduction of the inductor's value used in the newly proposed PFC circuit in comparison with the conventional boost converter which may lead to a huge reduction in size, weight and the cost of the new PFC circuit. Also, the active switches depend on a carefully designed switching pattern that results in an elimination of the third order harmonic from the input source current which decreases the value of total current harmonic distortion (THDI) to (14%) and improves the input PF to (0.99). Consequently, the simplicity of the design without requiring a complex control circuit and without a snubber circuit plus the minimum size of inductor, gives the newly proposed circuit the superiority on other PFC circuits. Thirdly, this research aims to describe the distortion power through submitting two novel power terms called effective active power (Pef ) & reactive power (Qef ) terms with a new power diagram called Right-Angled Power Triangle (RAPT) Diagram. In addition, a novel de nition of total apparent power (St) has been submitted in order to illustrate the physical meaning of (St) in non-sinusoidal systems. The new RAPT Diagram is based on the orthogonality law and depends on geometrical summation to describe the relationship between different aspects (apparent-active-reactive) of power, and different components (total-fundamental distortion), drawing a bridge to connect the time domain with the frequency domain in a two-dimensional diagram.

en_US
dc.description.sponsorshipThe Higher Committee For Education Development in Iraqen_US
dc.language.isoen
dc.publisherUniversity of Plymouth
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/us/*
dc.subjectPower System Harmonics, Passive Filters, Active Power Filter, Hybrid Active Power Filter, Active Power Factor Correction (APFC), AC-DC power convertors, Harmonic analysis, Power theories and definitionsen_US
dc.subject.classificationPhDen_US
dc.titleNovel Methods of Utilization, Elimination, and Description of The Distortion Power in Electrical Circuitsen_US
dc.typeThesis
plymouth.versionnon-publishableen_US
dc.rights.embargodate2019-01-23T11:58:31Z
dc.rights.embargodate9999-09-09
dc.rights.embargoperiod12 monthsen_US
dc.type.qualificationDoctorateen_US
rioxxterms.versionNA
plymouth.orcid_idhttps://orcid.org/0000-0001-8188-4722en_US


Files in this item

Thumbnail
Thumbnail
Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record

Attribution-NonCommercial-NoDerivs 3.0 United States
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 United States

All items in PEARL are protected by copyright law.
Author manuscripts deposited to comply with open access mandates are made available in accordance with publisher policies. Please cite only the published version using the details provided on the item record or document. In the absence of an open licence (e.g. Creative Commons), permissions for further reuse of content should be sought from the publisher or author.
Theme by 
@mire NV