Documents disponibles écrits par cet auteur

Analytical study of grid-fault response of wind turbine doubly fed induction generator / Pannell, G. 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. 1081 - 1091 Titre : Analytical study of grid-fault response of wind turbine doubly fed induction generator Type de document : texte imprimé Auteurs : Pannell, G., Auteur ; Atkinson, D. J., Auteur ; Zahawi, B., Auteur Année de publication : 2011 Article en page(s) : pp. 1081 - 1091 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Asynchronous  generators;  rotors;  stators;  wind  turbines Résumé : Grid-connected wind turbine doubly fed induction generators (DFIGs) are sensitive to dips in supply voltage, so-called “grid faults”. Fault ride through systems must be designed to manage the large and potentially dangerous fault currents in both stator and rotor circuits. However, DFIG fault response has been only partially or summarily treated in contemporary literature. This paper presents a detailed analytical analysis of wind turbine DFIG grid-fault response. The physical behavior of the machine is presented through a description of the flux-linkage response and later developed with analytical solutions of the generalized DFIG machine equations operating under fault conditions showing that the frequencies of the decay components of current deviate from pure dc and rotor speed due to magnetic drag effects. The analysis is experimentally verified and evaluated using a 7.5-kW test facility. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5623338&sortType%3Das [...] [article] Analytical study of grid-fault response of wind turbine doubly fed induction generator [texte imprimé] / Pannell, G., Auteur ; Atkinson, D. J., Auteur ; Zahawi, B., Auteur . - 2011 . - pp. 1081 - 1091. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25, N° 4 (Décembre 2010) . - pp. 1081 - 1091 Mots-clés : Asynchronous  generators;  rotors;  stators;  wind  turbines Résumé : Grid-connected wind turbine doubly fed induction generators (DFIGs) are sensitive to dips in supply voltage, so-called “grid faults”. Fault ride through systems must be designed to manage the large and potentially dangerous fault currents in both stator and rotor circuits. However, DFIG fault response has been only partially or summarily treated in contemporary literature. This paper presents a detailed analytical analysis of wind turbine DFIG grid-fault response. The physical behavior of the machine is presented through a description of the flux-linkage response and later developed with analytical solutions of the generalized DFIG machine equations operating under fault conditions showing that the frequencies of the decay components of current deviate from pure dc and rotor speed due to magnetic drag effects. The analysis is experimentally verified and evaluated using a 7.5-kW test facility. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5623338&sortType%3Das [...]

Minimum-threshold crowbar for a fault-ride-through grid-code-compliant DFIG wind turbine / Pannell, G. in IEEE transactions on energy conversion, Vol. 25, N° 3 (Septembre 2010) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 25, N° 3 (Septembre 2010) . - pp. 750 - 759 Titre : Minimum-threshold crowbar for a fault-ride-through grid-code-compliant DFIG wind turbine Type de document : texte imprimé Auteurs : Pannell, G., Auteur ; Atkinson, D. J., Auteur ; Zahawi, B., Auteur Année de publication : 2011 Article en page(s) : pp. 750 - 759 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : asynchronous  generators;  fault  diagnosis;  overcurrent  protection;  overvoltage  protection;  power  generation  economics;  power  generation  protection;  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%3Das [...] [article] Minimum-threshold crowbar for a fault-ride-through grid-code-compliant DFIG wind turbine [texte imprimé] / Pannell, G., Auteur ; Atkinson, D. J., Auteur ; Zahawi, B., Auteur . - 2011 . - pp. 750 - 759. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25, N° 3 (Septembre 2010) . - pp. 750 - 759 Mots-clés : asynchronous  generators;  fault  diagnosis;  overcurrent  protection;  overvoltage  protection;  power  generation  economics;  power  generation  protection;  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%3Das [...]