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Quasi-Z-Source three-phase rectifier modelling and control
Dissertation (MEng (Electrical Engineering))--University of Pretoria, 2013.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2014
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| _version_ | 1867613569317601280 |
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| access_status_str | Open Access |
| author2 | Gitau, Michael Njoroge |
| author_browse | Gitau, Michael Njoroge |
| author_facet | Gitau, Michael Njoroge |
| collection | Thesis |
| dc_rights_str_mv | © 2013 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MEng (Electrical Engineering))--University of Pretoria, 2013. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/37317 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:38:13.749Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/37317 Quasi-Z-Source three-phase rectifier modelling and control Gitau, Michael Njoroge lomkala@yahoo.fr Kala Konga, Lomami AC to DC converter Z-source rectifier Quasi-Z-source rectifier Buck-boost rectifier Shoot-through Dynamic model Control UCTD Dissertation (MEng (Electrical Engineering))--University of Pretoria, 2013. AC to DC rectifiers are used as front-end interface in multiple applications with DC load or in inverter fed from line voltage. In applications with variable AC input voltage, rectifiers with buck-boost capability are critical for achieving the most efficient power conversion. The Z-source rectifier has been presented as the most suitable rectifier with buck-boost performance. This dissertation introduces and analyses the quasi-Z-source rectifier as an alternative efficient AC to DC converter with buck-boost capability. The model of the quasi-Z-source rectifier is derived. The model of the Z-source rectifier is also derived with an alternative approach. It is found from analytical results of the modelling that the quasi-Zsource is a more cost-effective rectifier than the Z-source rectifier due to lower rated capacitors. A two stages closed-loop controller for the quasi-Z-source rectifier is then designed. Software simulations and hardware experiments of the quasi-Z-source rectifier are performed and the results obtained confirm its efficient performances. This makes the quasi- Z-source rectifier appropriate in renewable energy systems with AC voltage variations such as wind power. gm2014 Electrical, Electronic and Computer Engineering MEng (Electrical Engineering) Unrestricted 2014-04-01T09:12:55Z 2014-04-01T09:12:55Z 2013-09-04 2013 Dissertation Kala Konga, L 2013, Quasi-Z-Source three-phase rectifier modelling and control, MEng dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/37317> E13/9/1027/gm http://hdl.handle.net/2263/37317 en © 2013 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | AC to DC converter Z-source rectifier Quasi-Z-source rectifier Buck-boost rectifier Shoot-through Dynamic model Control UCTD Quasi-Z-Source three-phase rectifier modelling and control |
| title | Quasi-Z-Source three-phase rectifier modelling and control |
| title_full | Quasi-Z-Source three-phase rectifier modelling and control |
| title_fullStr | Quasi-Z-Source three-phase rectifier modelling and control |
| title_full_unstemmed | Quasi-Z-Source three-phase rectifier modelling and control |
| title_short | Quasi-Z-Source three-phase rectifier modelling and control |
| title_sort | quasi z source three phase rectifier modelling and control |
| topic | AC to DC converter Z-source rectifier Quasi-Z-source rectifier Buck-boost rectifier Shoot-through Dynamic model Control UCTD |
| url | http://hdl.handle.net/2263/37317 |