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Fault-ride-through capability at wind power plant interfacing a three-phase generator to a dc-bus
Thesis (PhD)--University of Pretoria, 2020.
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University of Pretoria
2021
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| _version_ | 1867613658741211136 |
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| access_status_str | Open Access |
| author2 | Bansal, Ramesh C. |
| author_browse | Bansal, Ramesh C. |
| author_facet | Bansal, Ramesh C. |
| collection | Thesis |
| dc_rights_str_mv | © 2021 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 | Thesis (PhD)--University of Pretoria, 2020. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/82485 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:39:39.216Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| 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:2263/82485 Fault-ride-through capability at wind power plant interfacing a three-phase generator to a dc-bus Bansal, Ramesh C. Gitau, Michael Njoroge Mohammed, Inas Mohammed Osman UCTD Voltage control fault ride-through Vienna rectifier wind power transient stability Thesis (PhD)--University of Pretoria, 2020. The increased demand for electricity has led to a global energy transition towards the use of renewable energy sources for power generation. Renewable energy has several advantages such as high efficiency, resource availability, cost competitiveness and environmental adequateness, compared to conventional fossil fuel power plants. Recent research studies have therefore focused on developing renewable energy technology. In fact, for alternating current (AC) collection grids, each wind energy conversion system (WECS) on a wind power plant (WPP) includes a wind turbine plus mechanical parts (i.e. gearbox), a generator (squirrel cage induction generator (SCIG), doubly fed induction generator (DFIG), permanent magnet synchronous generator (PMSG)), and a massive 50 or 60 Hz power transformer including controller circuit. A wind farm with a direct current (DC) transmission link is considered for this study. For a wind farm employing DC collection grid, the massive power transformers in the WECSs are replaced by the power electronic converters. The power electronic converter is significantly more compact and smaller in size compared to a power transformer of identical features. High voltage DC (HVDC) power transmission and distribution systems play an integral role in power systems and renewable energy resources integration technology. The WPPs have to play an essential function in maintaining grid stability due to the continuous progress in the number of grid-connected wind farms. This growth requires the wind turbine generator (WTG) on wind farm to stay connected to the power grid for any fault conditions. The fault ride-through (FRT) capability is the ability of WECS to stay connected for short periods of fault conditions. This expression can also be used to demonstrate the ability of a wind farm to participate in the voltage stability during grid faults. This study proposes integration of the wind energy conversion unit (WECU) three-phase controlled switch active converters. Two configurations for the converters are considered: Vienna rectifier-I Modular multi-level converters (MMC) In these configurations, the switching loss is reduced due to a smaller number of switches used in Vienna rectifier, and low switching frequency in MMC compared with conventional active rectifiers. The dynamic behaviour of the overall DC collection grid is also investigated in terms of (voltage/current) signal perturbations. The small-signal based control method which limits the signal variations to about zero is employed. Intensive simulations are presented with the use of the power simulator (PSim, Rockville, USA) software, to ride- through several DC and AC system faults. Electrical, Electronic and Computer Engineering PhD (Electrical) Unrestricted 2021-11-02T10:19:40Z 2021-11-02T10:19:40Z 2021 2020 Thesis * A2021 http://hdl.handle.net/2263/82485 © 2021 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 | UCTD Voltage control fault ride-through Vienna rectifier wind power transient stability Fault-ride-through capability at wind power plant interfacing a three-phase generator to a dc-bus |
| title | Fault-ride-through capability at wind power plant interfacing a three-phase generator to a dc-bus |
| title_full | Fault-ride-through capability at wind power plant interfacing a three-phase generator to a dc-bus |
| title_fullStr | Fault-ride-through capability at wind power plant interfacing a three-phase generator to a dc-bus |
| title_full_unstemmed | Fault-ride-through capability at wind power plant interfacing a three-phase generator to a dc-bus |
| title_short | Fault-ride-through capability at wind power plant interfacing a three-phase generator to a dc-bus |
| title_sort | fault ride through capability at wind power plant interfacing a three phase generator to a dc bus |
| topic | UCTD Voltage control fault ride-through Vienna rectifier wind power transient stability |
| url | http://hdl.handle.net/2263/82485 |