Optimization of multibrid permanent-magnet wind generator systems / Li, Hui in IEEE transactions on energy conversion, Vol. 24 N°1 (Mars 2009)  

Public ISBD [article]  inIEEE transactions on energy conversion > Vol. 24 N°1 (Mars 2009) . - pp. 82 - 92 Titre : Optimization of multibrid permanent-magnet wind generator systems Type de document : texte imprimé Auteurs : Li, Hui, Auteur ; Zhe, Chen, Auteur ; Polinder, H., Auteur Année de publication : 2009 Article en page(s) : pp. 82 - 92 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Gears  genetic algorithms  permanent magnet generators  power convertors  wind turbines Résumé : This paper investigates the cost-effective ranges of gearbox ratios and power ratings of multibrid permanent-magnet (PM) wind generator systems by using a design optimization method. First, the analytical model of a multibrid wind turbine concept consisting of a single-stage gearbox and a three-phase radial-flux PM synchronous generator with a back-to-back power converter is presented. The design optimization is adopted with a genetic algorithm for minimizing generator system cost. To demonstrate the effectiveness of the developed electromagnetic design model, the optimization results of a 500-kW direct-drive PM generator and a 1.5-MW multibrid PM generator with various gear ratios are, respectively, compared with those from other methods. Then, the optimal design approach is further employed for a range from 750 kW up to 10 MW. The optimization results of PM generator systems including direct-drive and multibrid wind turbine configurations are obtained, and the suitable ranges of gear ratios for different power ratings are investigated. Finally, the detailed comparisons of the most cost-effective multibrid PM generator system and the optimized direct-drive PM generator system are also presented and discussed. The comparative results have shown that the multibrid wind turbine concept appears more cost-effective than the direct-drive concept. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4783055&sortType%3Das [...] [article] Optimization of multibrid permanent-magnet wind generator systems [texte imprimé] / Li, Hui, Auteur ; Zhe, Chen, Auteur ; Polinder, H., Auteur . - 2009 . - pp. 82 - 92. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 24 N°1 (Mars 2009) . - pp. 82 - 92 Mots-clés : Gears  genetic algorithms  permanent magnet generators  power convertors  wind turbines Résumé : This paper investigates the cost-effective ranges of gearbox ratios and power ratings of multibrid permanent-magnet (PM) wind generator systems by using a design optimization method. First, the analytical model of a multibrid wind turbine concept consisting of a single-stage gearbox and a three-phase radial-flux PM synchronous generator with a back-to-back power converter is presented. The design optimization is adopted with a genetic algorithm for minimizing generator system cost. To demonstrate the effectiveness of the developed electromagnetic design model, the optimization results of a 500-kW direct-drive PM generator and a 1.5-MW multibrid PM generator with various gear ratios are, respectively, compared with those from other methods. Then, the optimal design approach is further employed for a range from 750 kW up to 10 MW. The optimization results of PM generator systems including direct-drive and multibrid wind turbine configurations are obtained, and the suitable ranges of gear ratios for different power ratings are investigated. Finally, the detailed comparisons of the most cost-effective multibrid PM generator system and the optimized direct-drive PM generator system are also presented and discussed. The comparative results have shown that the multibrid wind turbine concept appears more cost-effective than the direct-drive concept. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4783055&sortType%3Das [...]

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Structural flexibility / Shrestha, G. in IEEE transactions on energy conversion, Vol. 25, N° 3 (Septembre 2010)  

Public ISBD [article]  inIEEE transactions on energy conversion > Vol. 25, N° 3 (Septembre 2010) . - pp. 732 - 740 Titre : Structural flexibility : a solution for weight reduction of large direct-drive wind-turbine generators Type de document : texte imprimé Auteurs : Shrestha, G., Auteur ; Polinder, H., Auteur ; Deok-je Bang, Auteur Année de publication : 2011 Article en page(s) : pp. 732 - 740 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : electric drives  magnetic bearings  turbogenerators  wind turbines Résumé : This paper looks into a new concept for reducing the structural weight of large direct-drive generators used in wind turbines. The concept uses magnetic bearings to position the rotor of the generator. The use of magnetic bearings allows structural flexibility in the generator. The weight of the rotor using the new concept is compared to the weight of a rotor designed with conventional methods. For a 5-MW generator, the result is that the structural weight of the rotor reduces by 45%. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5484469&sortType%3Das [...] [article] Structural flexibility : a solution for weight reduction of large direct-drive wind-turbine generators [texte imprimé] / Shrestha, G., Auteur ; Polinder, H., Auteur ; Deok-je Bang, Auteur . - 2011 . - pp. 732 - 740. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25, N° 3 (Septembre 2010) . - pp. 732 - 740 Mots-clés : electric drives  magnetic bearings  turbogenerators  wind turbines Résumé : This paper looks into a new concept for reducing the structural weight of large direct-drive generators used in wind turbines. The concept uses magnetic bearings to position the rotor of the generator. The use of magnetic bearings allows structural flexibility in the generator. The weight of the rotor using the new concept is compared to the weight of a rotor designed with conventional methods. For a 5-MW generator, the result is that the structural weight of the rotor reduces by 45%. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5484469&sortType%3Das [...]

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