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Performance and control of multi three-phase converter-fed non-overlapping winding wound rotor synchronous wind generator
Thesis (MEng) -- Stellenbosch University, 2022.
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| Other Authors: | |
| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2022
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| _version_ | 1867614120677736448 |
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| access_status_str | Open Access |
| author | Dube, Lucky |
| author2 | Kamper, Maarten |
| author_browse | Dube, Lucky Kamper, Maarten |
| author_facet | Kamper, Maarten Dube, Lucky |
| author_sort | Dube, Lucky |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MEng) -- Stellenbosch University, 2022. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/126101 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:46:59.291Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/126101 Performance and control of multi three-phase converter-fed non-overlapping winding wound rotor synchronous wind generator Dube, Lucky Kamper, Maarten Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. Wind energy conversion systems Synchronous generators Renewable energy sources Wind power Electric power distribution UCTD Thesis (MEng) -- Stellenbosch University, 2022. ENGLISH ABSTRACT: In the search for efficient and reliable non-permanent magnet wind generator solutions, this thesis proposes a multi-three-phase converter-fed wound rotor synchronous generator (WRSG) for variable-speed large-scale wind turbines. The focus is on geared, mediumspeed wind generators. The stator winding of the WRSG features non-overlapping coils with a 16/18 pole/slot combination. The multi-three-phase converter-fed system has two purposes: (i) to remove and/or reduce sub magneto-motive force harmonics in the WRSG; and (ii) to have converter fault tolerance when one or two converters fail. As a first step toward proving that the proposed system is feasible and effective for large-scale wind generators, finite element analysis (FEA) is performed on a medium-speed, direct-drive, small-scale WRSG. An algorithm for determining optimal WRSG currents for maximum power point tracking (MPPT) with minimal WRSG copper losses is developed. The FEA results of the algorithm showed that two turbine speed functions can be used to determine optimal WRSG reference currents so that the wind turbine can harness maximum power from the wind. As a result, the Matlab/Simulink package is used to design and simulate an MPPT current controller for the WRSG based on the two turbine speed functions. This is done in order to study the dynamics of the WRSG-based wind turbine system. To validate the simulation results, experimental tests of the MPPT current controller are conducted using an in-house built Pentium control system based on Linux. AFRIKAANS OPSOMMING: In die soeke na doeltreffende en betroubare oplossings vir nie-permanente magneetwindopwekkers, stel hierdie tesis ’n multi-driefase-omskakelaar-gevoede sinchrone rotor-opwekker (WRSG) voor vir veranderlike-spoed grootskaalse windturbines. Die fokus is op gerat, mediumspoed windopwekkers. Die statorwikkeling van die WRSG beskik oor nie-oorvleuelende spoele met ’n 16/18 paal/gleuf kombinasie. Die multi-drie-fase omsetter-gevoed stelsel het twee doeleindes: (i) om submagneto-motoriese krag harmonieke in die WRSG te verwyder en/of te verminder; en (ii) om omskakelaarfouttoleransie te hˆe wanneer een of twee omsetters misluk. As ’n eerste stap om te bewys dat die voorgestelde stelsel haalbaar en effektief is vir grootskaalse windopwekkers, word eindige-elementanalise (FEA) op ’n mediumspoed, direkte-aangedrewe, kleinskaalse WRSG uitgevoer. ’n Algoritme vir die bepaling van optimale WRSG-strome vir maksimum kragpuntnasporing (MPPT) met minimale WRSG-koperverliese word ontwikkel. Die FEA-resultate van die algoritme het getoon dat twee turbinespoedfunksies gebruik kan word om optimale WRSG-verwysingsstrome te bepaal sodat die windturbine maksimum krag van die wind kan benut. As gevolg hiervan word die Matlab/Simulink-pakket gebruik om ’n MPPT-stroombeheerder vir die WRSG te ontwerp en te simuleer, gebaseer op die twee turbinespoedfunksies. Dit word gedoen om die dinamika van die WRSG-gebaseerde windturbinestelsel te bestudeer. Om die simulasieresultate te valideer, word eksperimentele toetse van die MPPT-stroombeheerder uitgevoer met behulp van ’n ingeboude Pentium-beheerstelsel gebaseer op Linux. Masters 2022-11-23T08:52:41Z 2023-01-16T12:50:07Z 2022-11-23T08:52:41Z 2023-01-16T12:50:07Z 2022-12 Thesis http://hdl.handle.net/10019.1/126101 en_ZA Stellenbosch University xix, 79 pages : illustrations. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Wind energy conversion systems Synchronous generators Renewable energy sources Wind power Electric power distribution UCTD Dube, Lucky Performance and control of multi three-phase converter-fed non-overlapping winding wound rotor synchronous wind generator |
| title | Performance and control of multi three-phase converter-fed non-overlapping winding wound rotor synchronous wind generator |
| title_full | Performance and control of multi three-phase converter-fed non-overlapping winding wound rotor synchronous wind generator |
| title_fullStr | Performance and control of multi three-phase converter-fed non-overlapping winding wound rotor synchronous wind generator |
| title_full_unstemmed | Performance and control of multi three-phase converter-fed non-overlapping winding wound rotor synchronous wind generator |
| title_short | Performance and control of multi three-phase converter-fed non-overlapping winding wound rotor synchronous wind generator |
| title_sort | performance and control of multi three phase converter fed non overlapping winding wound rotor synchronous wind generator |
| topic | Wind energy conversion systems Synchronous generators Renewable energy sources Wind power Electric power distribution UCTD |
| url | http://hdl.handle.net/10019.1/126101 |
| work_keys_str_mv | AT dubelucky performanceandcontrolofmultithreephaseconverterfednonoverlappingwindingwoundrotorsynchronouswindgenerator |