Title:
METHODS AND SYSTEMS FOR REDUCING THE IMPACT OF A GENERATOR SHORT CIRCUIT IN A WIND TURBINE
Document Type and Number:
WIPO Patent Application WO/2014/079453
Kind Code:
A3
Abstract:
A method is provided for reducing an impact of an unbalanced short circuit event that occurs in a polyphase permanent magnet generator of a wind turbine. According to the method, an unbalanced short circuit event is detected in the generator of the wind turbine, and, in response to detecting the unbalanced short circuit event, at least one phase of the generator is shorted at a switch-point between the generator and a converter of the wind turbine to create a balanced short circuit in the generator. By doing so, the torque response of the generator is altered to avoid high amplitude torque oscillations that would otherwise occur as a result of the unbalanced short circuit event.
Inventors:
DONESCU VICTOR (US)
HELLE LARS (DK)
HELLE LARS (DK)
Application Number:
PCT/DK2013/050374
Publication Date:
October 30, 2014
Filing Date:
November 13, 2013
Export Citation:
Assignee:
VESTAS WIND SYS AS (DK)
International Classes:
H02P29/02; H02J3/00
Foreign References:
| EP2372860A1 | 2011-10-05 | |||
| EP1819023A2 | 2007-08-15 |
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