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Evaluation of a high-pole number reluctance synchronous wind generator technology
Thesis (MEng) -- Stellenbosch University, 2022.
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| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2022
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| _version_ | 1867614024618737664 |
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| access_status_str | Open Access |
| author | Baziruwiha, Jean-Claude |
| author2 | Kamper, Maarten |
| author_browse | Baziruwiha, Jean-Claude Kamper, Maarten |
| author_facet | Kamper, Maarten Baziruwiha, Jean-Claude |
| author_sort | Baziruwiha, Jean-Claude |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MEng) -- Stellenbosch University, 2022. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/126143 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:45:27.799Z |
| 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:10019.1/126143 Evaluation of a high-pole number reluctance synchronous wind generator technology Baziruwiha, Jean-Claude Kamper, Maarten Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. Electric motors, Synchronous Electric generators -- Windings Synchronous generators Renewable energy sources UCTD Thesis (MEng) -- Stellenbosch University, 2022. ENGLISH ABSTRACT: The design and performance evaluation of high pole number reluctance synchronous wind generators (RSGs) are addressed in this thesis. A double-salient non-overlap winding reluctance synchronous generator for medium-speed, geared wind generator drives is proposed as a preliminary stage in the evaluation. Due to the difficulty in achieving an acceptable power factor (above 0.5) for the 16-pole reluctance machine, a triple three-phase converter-fed reluctance synchronous wind generator is proposed as an alternative to the conventional three-phase equivalent. Finite element modelling and solution methods are used to analyze the performance, and the coordinate descent (ascent) algorithm is used for the design optimization of such a reluctance generator. The application is ideally suited for large scale fault-tolerant converter wind turbines. This work on multi three-phase RSGs, however, focuses on a small scale sub-2-kW reluctance generator as a first step in the research. When compared to the conventional three-phase reluctance synchronous wind generator, the proposed triple three-phase generator has a significant improvement in power factor and torque ripple. Additionally, this thesis also explores the design and performance of a reluctance synchronous machine for a 5 MW medium-speed geared wind generator drive-train. As previously stated, achieving an acceptable power factor for high pole number reluctance machines is difficult. As a result, in order to address this issue in the proposed RSGs, a modular epoxy-casted rotor is proposed. Finite element modelling and multi-objective design optimization are used to analyze the performance of such a reluctance rotor synchronous generator. The torque density versus power factor Pareto front performance of the generator was determined using the design optimization approach. This approach provides important information on this rotor generator type. A power factor of 0.72 was attained for the specified generator design with its 16-pole, epoxy-casted reluctance rotor at a reasonably good torque density of 24 kNm/m3 and efficiency of 98.8%. AFRIKAANS OPSOMMING: Die ontwerp en prestasie-evaluering van ho¨e paalgetal-onwilligheid sinchrone windopwekkers word in hierdie tesis aangespreek. ’n Dubbel-opvallende nie-oorvleueling sinchroniese kragopwekker vir kronkelweerstandigheid vir mediumspoed, geratwindopwekker dryf word voorgestel as ’n voorlopige stadium in die evaluering. As gevolg van die moeilikheid om ’n aanvaarbare arbeidsfaktor (bo 0.5) vir die 16-pool te bereik onwilligheid masjien, ’n drie-fase omsetter-gevoed onwilligheid sinchrone windgenerator word voorgestel as ’n alternatief vir die konvensionele driefase ekwivalent. Eindige element modellering en oplossingsmetodes word gebruik om te analiseer die prestasie en ko¨ordinaat afkoms (opstyg) algoritme word gebruik vir ontwerp optimering van so ’n reluksiegenerator. Die toepassing is ideaal geskik vir grootskaalse foutverdraagsame omsetter-windturbines. Hierdie werk op multi drie-fase RSG’s fokus egter op ’n klein skaal sub-2-kW onwilligheid kragopwekker as ’n eerste stap in die navorsing. In vergelyking met die konvensionele drie-fase reluksie sinchrone wind kragopwekker, die voorgestelde kragopwekker het ’n aansienlike verbetering in kragfaktor en wringkragrimpeling. Daarbenewens ondersoek hierdie tesis ook die ontwerp en uitvoering van ’n sinchroniese masjien vir ’n 5 MW mediumspoed-gerat windgenerator dryf-trein. Soos voorheen gesˆe, die bereiking van ’n aanvaarbare drywingsfaktor vir masjiene met ’n ho¨e poolgetal is moeilik. As gevolg hiervan, ten einde hierdie kwessie in die voorgestelde RSG’e aanspreek, is ’n modul ˆere epoksie-gegote rotor voorgestelde. Eindige element modellering en multi-objektiewe ontwerp optimering was gebruik om die werkverrigting van so ’n reluksierotor sinchronies te ontleed kragopwekker. Die wringkragdigtheid versus drywingsfaktor Pareto-voorverrigting van die kragopwekker is met behulp van die ontwerpoptimeringsbenadering bepaal. Hierdie benadering verskaf belangrike inligting oor hierdie rotor generator tipe. ’n Krag faktor van 0.72 is behaal vir die gespesifiseerde kragopwekkerontwerp met sy 16-polige, epoksie-gegote reluksierotor teen ’n redelike goeie wringkragdigtheid van 24 kNm/m3 en doeltreffendheid van 98.8%. Masters 2022-11-23T11:20:20Z 2023-01-16T12:52:18Z 2022-11-23T11:20:20Z 2023-01-16T12:52:18Z 2022-12 Thesis http://hdl.handle.net/10019.1/126143 en_ZA Stellenbosch University xvi, 70 pages : illustrations application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Electric motors, Synchronous Electric generators -- Windings Synchronous generators Renewable energy sources UCTD Baziruwiha, Jean-Claude Evaluation of a high-pole number reluctance synchronous wind generator technology |
| title | Evaluation of a high-pole number reluctance synchronous wind generator technology |
| title_full | Evaluation of a high-pole number reluctance synchronous wind generator technology |
| title_fullStr | Evaluation of a high-pole number reluctance synchronous wind generator technology |
| title_full_unstemmed | Evaluation of a high-pole number reluctance synchronous wind generator technology |
| title_short | Evaluation of a high-pole number reluctance synchronous wind generator technology |
| title_sort | evaluation of a high pole number reluctance synchronous wind generator technology |
| topic | Electric motors, Synchronous Electric generators -- Windings Synchronous generators Renewable energy sources UCTD |
| url | http://hdl.handle.net/10019.1/126143 |
| work_keys_str_mv | AT baziruwihajeanclaude evaluationofahighpolenumberreluctancesynchronouswindgeneratortechnology |