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Opimisation techniques for the design of a DC-excited vernier reluctance machine operated as a synchronous condenser
Thesis (MEng)--Stellenbosch University, 2023.
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| Format: | Thesis |
| Language: | en_ZA en_ZA |
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Stellenbosch : Stellenbosch University
2023
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| _version_ | 1867613900014354432 |
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| access_status_str | Open Access |
| author | Botes, Abraham |
| author2 | Kamper, Maarten |
| author_browse | Botes, Abraham Kamper, Maarten |
| author_facet | Kamper, Maarten Botes, Abraham |
| author_sort | Botes, Abraham |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MEng)--Stellenbosch University, 2023. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/127271 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA en_ZA |
| last_indexed | 2026-06-10T12:43:29.289Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/127271 Opimisation techniques for the design of a DC-excited vernier reluctance machine operated as a synchronous condenser Botes, Abraham Kamper, Maarten Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. Synchronous circuits Capacitors Reluctance motors Renewable energy sources Thesis (MEng)--Stellenbosch University, 2023. ENGLISH ABSRACT: With the growth in the renewable energy sector, and with power electronic devices failing to provide the required grid strength, there has been a renewed interest in the synchronous condenser industry. Synchronous condensers are used to provide rotational inertia, short circuit strength, low voltage ride through and reactive power compensation to the grid. However, synchronous condensers are also known for high operational losses and costly maintenance requirements. The DC-excited vernier reluctance machine was recently proposed as an alternative to address some disadvantages of conventional wound rotor synchronous condensers [1]. This study continues the research by focusing on the development of an optimisation technique that optimises the reactive power performance of the DC-excited vernier reluctance machine as a synchronous condenser for a fixed machine volume. An optimum selection criterion for a synchronous condenser from the optimisation Pareto front is proposed based on the relationship between the required reactive power and an efficiency indicator of reactive power per loss. As part of the optimisation, a technique is developed that estimates the core losses of the dc-excited vernier reluctance synchronous condenser within a single finite element solution. This technique is developed to reduce the computation time of the optimisation. Furthermore, the performance of the optimised DC-excited vernier reluctance synchronous condenser is analysed using two finite element packages. The frozen permeability technique is adopted and used to calculate the inductance and performance parameters of the machine. In this thesis the author applies the optimisation technique to DC-excited vernier reluctance synchronous condensers with different volumetric sizes and kvar-ratings as part of a case study. As part of this case study, a 300 Mvar wound-field flux-switching machine is optimised with the newly developed optimisation technique and compared to a dc-excited vernier reluctance synchronous condenser of the same volumetric size. The author also includes a conventional four-pole synchronous condenser in the case study that compares the reactive power per loss and per volume. These machines are then compared, by mainly considering their reactive power per loss and reactive power per volume. Finally, a 55 kvar DC-excited vernier reluctance synchronous condenser prototype is built as part of the study. This prototype is used for the experimental data validation of the simulated results. AFRIKAANSE OPSOMMING: Geen opsomming beskikbaar. Masters 2023-03-03T07:41:47Z 2023-05-18T07:13:18Z 2023-03-03T07:41:47Z 2023-05-18T07:13:18Z 2023-03 Thesis http://hdl.handle.net/10019.1/127271 en_ZA en_ZA Stellenbosch University xix, 97 pages : illustrations. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Synchronous circuits Capacitors Reluctance motors Renewable energy sources Botes, Abraham Opimisation techniques for the design of a DC-excited vernier reluctance machine operated as a synchronous condenser |
| title | Opimisation techniques for the design of a DC-excited vernier reluctance machine operated as a synchronous condenser |
| title_full | Opimisation techniques for the design of a DC-excited vernier reluctance machine operated as a synchronous condenser |
| title_fullStr | Opimisation techniques for the design of a DC-excited vernier reluctance machine operated as a synchronous condenser |
| title_full_unstemmed | Opimisation techniques for the design of a DC-excited vernier reluctance machine operated as a synchronous condenser |
| title_short | Opimisation techniques for the design of a DC-excited vernier reluctance machine operated as a synchronous condenser |
| title_sort | opimisation techniques for the design of a dc excited vernier reluctance machine operated as a synchronous condenser |
| topic | Synchronous circuits Capacitors Reluctance motors Renewable energy sources |
| url | http://hdl.handle.net/10019.1/127271 |
| work_keys_str_mv | AT botesabraham opimisationtechniquesforthedesignofadcexcitedvernierreluctancemachineoperatedasasynchronouscondenser |