Documents disponibles écrits par cet auteur

Characterization of the rotor magnetic field in a brushless doubly-fed induction machine / Blàzquez, F. in IEEE transactions on energy conversion, Vol. 24 N° 3 (Septembre 2009) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 24 N° 3 (Septembre 2009) . - pp. 599 - 607 Titre : Characterization of the rotor magnetic field in a brushless doubly-fed induction machine Type de document : texte imprimé Auteurs : Blàzquez, F., Auteur ; Veganzones, C., Auteur ; Ramirez D., Auteur Année de publication : 2010 Article en page(s) : pp. 599 - 607 Note générale : Energy Conversion Langues : Anglais (eng) Mots-clés : Brushless  machines--Induction  motors--Rotors--Stators--Synchronous  machines Résumé : The large increase in wind generation could improve the final development of wind systems with brushless doubly-fed induction machines (BDFIM) as an alternative to the doubly-fed asynchronous machines. For this reason, a detailed study of several aspects of the BDFIM design, as well as of its rotor configuration, is absolutely essential. In this paper, the authors present an alternative formulation of the BDFIM operating principle in synchronous mode. Besides the basic equation of the machine operation, it presents as main advantage the precise characterization of all the magnetic field components in a BDFIM with idealized stator windings and an idealized rotor cage. Based on this formulation, the paper provides a standard that may be used to compare the fields created by different real BDFIMs. This standard has been validated by laboratory tests. Published in: Note de contenu : Bibiogr. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5224018&sortType%3Das [...] [article] Characterization of the rotor magnetic field in a brushless doubly-fed induction machine [texte imprimé] / Blàzquez, F., Auteur ; Veganzones, C., Auteur ; Ramirez D., Auteur . - 2010 . - pp. 599 - 607. Energy Conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 24 N° 3 (Septembre 2009) . - pp. 599 - 607 Mots-clés : Brushless  machines--Induction  motors--Rotors--Stators--Synchronous  machines Résumé : The large increase in wind generation could improve the final development of wind systems with brushless doubly-fed induction machines (BDFIM) as an alternative to the doubly-fed asynchronous machines. For this reason, a detailed study of several aspects of the BDFIM design, as well as of its rotor configuration, is absolutely essential. In this paper, the authors present an alternative formulation of the BDFIM operating principle in synchronous mode. Besides the basic equation of the machine operation, it presents as main advantage the precise characterization of all the magnetic field components in a BDFIM with idealized stator windings and an idealized rotor cage. Based on this formulation, the paper provides a standard that may be used to compare the fields created by different real BDFIMs. This standard has been validated by laboratory tests. Published in: Note de contenu : Bibiogr. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5224018&sortType%3Das [...]

Coordinated power quality improvement in multiunit diesel power plants / Platero, C. A. in IEEE transactions on energy conversion, Vol. 25, N° 4 (Décembre 2010) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 25, N° 4 (Décembre 2010) . - pp. 1102 - 1111 Titre : Coordinated power quality improvement in multiunit diesel power plants Type de document : texte imprimé Auteurs : Platero, C. A., Auteur ; Blàzquez, F., Auteur ; Frias, P., Auteur Année de publication : 2011 Article en page(s) : pp. 1102 - 1111 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Compensation;  diesel  engines;  diesel-electric  power  stations;  power  grids;  power  supply  quality;  power  system  interconnection;  synchronisation;  torque  control Résumé : Power quality is a main concern in power systems with generators driven by internal combustion engines, especially by low- and medium-speed diesel engines. The torque in internal combustion engines, which is the superposition of the torques from each cylinder, has periodic oscillations. These torque oscillations, once the generator is connected to the grid, result in power fluctuations and voltage flicker problems, which clearly reduce power quality. This paper presents a new control strategy to improve power quality in multiunit diesel power plants, based on the compensation of the electrical fluctuations between individual generators. This compensation is performed by properly controlling the mechanical rotor phase angle between the different generators during the synchronization process. The proposed control strategy is verified using a case study. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5546931&sortType%3Das [...] [article] Coordinated power quality improvement in multiunit diesel power plants [texte imprimé] / Platero, C. A., Auteur ; Blàzquez, F., Auteur ; Frias, P., Auteur . - 2011 . - pp. 1102 - 1111. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25, N° 4 (Décembre 2010) . - pp. 1102 - 1111 Mots-clés : Compensation;  diesel  engines;  diesel-electric  power  stations;  power  grids;  power  supply  quality;  power  system  interconnection;  synchronisation;  torque  control Résumé : Power quality is a main concern in power systems with generators driven by internal combustion engines, especially by low- and medium-speed diesel engines. The torque in internal combustion engines, which is the superposition of the torques from each cylinder, has periodic oscillations. These torque oscillations, once the generator is connected to the grid, result in power fluctuations and voltage flicker problems, which clearly reduce power quality. This paper presents a new control strategy to improve power quality in multiunit diesel power plants, based on the compensation of the electrical fluctuations between individual generators. This compensation is performed by properly controlling the mechanical rotor phase angle between the different generators during the synchronization process. The proposed control strategy is verified using a case study. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5546931&sortType%3Das [...]

A novel rotor ground-fault-detection technique for synchronous machines with static excitation / Gaona, C.A.P. in IEEE transactions on energy conversion, Vol. 25, N° 4 (Décembre 2010) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 25, N° 4 (Décembre 2010) . - pp. 965 - 973 Titre : A novel rotor ground-fault-detection technique for synchronous machines with static excitation Type de document : texte imprimé Auteurs : Gaona, C.A.P., Auteur ; Blàzquez, F., Auteur ; Frias, P., Auteur Année de publication : 2011 Article en page(s) : pp. 965 - 973 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Earthing;  rotors;  synchronous  machines Résumé : This paper presents a novel ground-fault-detection technique for synchronous machines. This technique is suitable for synchronous machines with static excitation systems, whose excitation field winding is fed by rectifiers through an excitation transformer. The main contribution of this new technique is that it can detect and discriminate both ac- and dc-side ground faults in the excitation system, without the need for traditional power injection sources. This detection technique is based on the frequency analysis of the voltages or currents at a grounding impedance placed at the excitation transformer neutral terminal. This technique has been validated through computer simulations and experimental laboratory tests. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5477162&sortType%3Das [...] [article] A novel rotor ground-fault-detection technique for synchronous machines with static excitation [texte imprimé] / Gaona, C.A.P., Auteur ; Blàzquez, F., Auteur ; Frias, P., Auteur . - 2011 . - pp. 965 - 973. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25, N° 4 (Décembre 2010) . - pp. 965 - 973 Mots-clés : Earthing;  rotors;  synchronous  machines Résumé : This paper presents a novel ground-fault-detection technique for synchronous machines. This technique is suitable for synchronous machines with static excitation systems, whose excitation field winding is fed by rectifiers through an excitation transformer. The main contribution of this new technique is that it can detect and discriminate both ac- and dc-side ground faults in the excitation system, without the need for traditional power injection sources. This detection technique is based on the frequency analysis of the voltages or currents at a grounding impedance placed at the excitation transformer neutral terminal. This technique has been validated through computer simulations and experimental laboratory tests. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5477162&sortType%3Das [...]