| Titre : | Minimum-threshold crowbar for a fault-ride-through grid-code-compliant DFIG wind turbine (2011) |
| Auteurs : | Pannell, G., Auteur ; Atkinson, D. J., Auteur ; Zahawi, B., Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | IEEE transactions on energy conversion (Vol. 25, N° 3, Septembre 2010) |
| Article en page(s) : | pp. 750 - 759 |
| Note générale : | energy conversion |
| Langues : | Anglais |
| Tags : | asynchronous generators ; fault diagnosis ; overcurrent protection ; overvoltage power generation economics ; wind turbines |
| Résumé : | Doubly fed induction generator (DFIG) technology is the dominant technology in the growing global market for wind power generation, due to the combination of variable-speed operation and a cost-effective partially rated power converter. However, the DFIG is sensitive to dips in supply voltage and without specific protection to “ride-through” grid faults, a DFIG risks damage to its power converter due to overcurrent and/or overvoltage. Conventional converter protection via a sustained period of rotor-crowbar closed circuit leads to poor power output and sustained suppression of the stator voltages. A new minimum-threshold rotor-crowbar method is presented in this paper, improving fault response by reducing crowbar application periods to 11-16 ms, successfully diverting transient overcurrents, and restoring good power control within 45 ms of both fault initiation and clearance, thus enabling the DFIG to meet grid-code fault-ride-through requirements. The new method is experimentally verified and evaluated using a 7.5-kW test facility. |
| En ligne : | http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5484719&sortType%3Dasc_p_Sequence%26filter%3DAND%28p_IS_Number%3A5552140%29 |
