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Fault tolerant control for a modular generator-converter scheme for direct drive wind turbines
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Parker, Max, Ng, Chong and Ran, Li (2011) Fault tolerant control for a modular generator-converter scheme for direct drive wind turbines. IEEE Transactions on Industrial Electronics, 58 (1). pp. 305-315. ISSN 0278-0046.
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Official URL: http://dx.doi.org/10.1109/TIE.2010.2045318
Abstract
A modular power electronic converter, with a cascaded H-bridge multilevel inverter, has been proposed as the grid interface for a large direct-drive wind turbine generator. The present study is to investigate the potential and requirement of fault-tolerant operation in such a system. As each module is connected to isolated generator coils, tolerance to a module or coil fault is possible if the affected module can be bypassed, whereas the control of the healthy modules can be adjusted accordingly. A boost rectifier scheme on the machine side of the power conversion stage has been developed for this purpose, featuring control of the coil current without measuring the electromotive force. A coordinated dc-link voltage controller has been developed, which can rapidly raise the dc-link voltage of the remaining modules to compensate for the loss of a module while ignoring the ripple in the dc link due to low-frequency inverter switching. The ability of the resultant system to tolerate module faults has been demonstrated on a small-scale laboratory prototype.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
Journal or Publication Title: | IEEE Transactions on Industrial Electronics | ||||
Publisher: | IEEE | ||||
ISSN: | 0278-0046 | ||||
Official Date: | 2011 | ||||
Dates: |
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Volume: | 58 | ||||
Number: | 1 | ||||
Page Range: | pp. 305-315 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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