Documents disponibles écrits par cet auteur

Annual wind speed estimation utilizing constrained grey predictor / Atwa, Y. M. in IEEE transactions on energy conversion, Vol. 24 N° 2 (Juin 2009) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 24 N° 2 (Juin 2009) . - pp. 548 - 550 Titre : Annual wind speed estimation utilizing constrained grey predictor Type de document : texte imprimé Auteurs : Atwa, Y. M., Auteur ; El-Saadany, E. F., Auteur Année de publication : 2009 Article en page(s) : pp. 548 - 550 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Grey  systems;  wind  power Résumé : In this letter, a novel technique for annual wind speed estimation based on constrained Grey predictor is presented. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4957583&sortType%3Das [...] [article] Annual wind speed estimation utilizing constrained grey predictor [texte imprimé] / Atwa, Y. M., Auteur ; El-Saadany, E. F., Auteur . - 2009 . - pp. 548 - 550. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 24 N° 2 (Juin 2009) . - pp. 548 - 550 Mots-clés : Grey  systems;  wind  power Résumé : In this letter, a novel technique for annual wind speed estimation based on constrained Grey predictor is presented. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4957583&sortType%3Das [...]

A current control scheme with an adaptive internal model for torque ripple minimization and robust current regulation in PMSM drive systems / Mohamed, Y.A.-R.I. in IEEE transactions on energy conversion, Vol. 23 N°1 (Mars 2008) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 23 N°1 (Mars 2008) . - pp. 92 - 100 Titre : A current control scheme with an adaptive internal model for torque ripple minimization and robust current regulation in PMSM drive systems Type de document : texte imprimé Auteurs : Mohamed, Y.A.-R.I., Auteur ; El-Saadany, E. F., Auteur Année de publication : 2008 Article en page(s) : pp. 92 - 100 Note générale : Energy conversion Langues : Anglais (eng) Mots-clés : Lyapunov  methods;  closed  loop  systems;  electric  current  control;  machine  control;  permanent  magnet  motors;  robust  control;  synchronous  motor  drives;  torque  control Résumé : This paper addresses the problem of uncertainties in practical permanent magnet synchronous motors (PMSMs), and proposes a simple adaptive internal model within the current feedback and reference current generation structure as a solution. Due to the time varying nature and the high-bandwidth property of uncertainties in a practical PMSM drive system, the internal model is simply chosen as the estimated uncertainty function. To provide a high bandwidth estimate of the uncertainty function with high-noise immunity, a simple adaptation law is derived, in the sense of Lyapunov functions, using the nominal current dynamics. The inclusion of the frequency modes of the disturbances to be eliminated (the flux harmonics and voltage disturbances caused by parameter variation) in the stable closed-loop system introduces very high-attenuation at different frequency modes corresponding to uncertainty modes. Therefore, a robust torque ripple minimization and current regulation performances are yielded. To properly tune the proposed scheme, a stability analysis based on a discrete-time Lyapunov function has been used to determine the stability limits of the adaptation gain. Comparative evaluation results are presented to demonstrate the effectiveness of the proposed control scheme under different operating conditions. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4453985&sortType%3Das [...] [article] A current control scheme with an adaptive internal model for torque ripple minimization and robust current regulation in PMSM drive systems [texte imprimé] / Mohamed, Y.A.-R.I., Auteur ; El-Saadany, E. F., Auteur . - 2008 . - pp. 92 - 100. Energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 23 N°1 (Mars 2008) . - pp. 92 - 100 Mots-clés : Lyapunov  methods;  closed  loop  systems;  electric  current  control;  machine  control;  permanent  magnet  motors;  robust  control;  synchronous  motor  drives;  torque  control Résumé : This paper addresses the problem of uncertainties in practical permanent magnet synchronous motors (PMSMs), and proposes a simple adaptive internal model within the current feedback and reference current generation structure as a solution. Due to the time varying nature and the high-bandwidth property of uncertainties in a practical PMSM drive system, the internal model is simply chosen as the estimated uncertainty function. To provide a high bandwidth estimate of the uncertainty function with high-noise immunity, a simple adaptation law is derived, in the sense of Lyapunov functions, using the nominal current dynamics. The inclusion of the frequency modes of the disturbances to be eliminated (the flux harmonics and voltage disturbances caused by parameter variation) in the stable closed-loop system introduces very high-attenuation at different frequency modes corresponding to uncertainty modes. Therefore, a robust torque ripple minimization and current regulation performances are yielded. To properly tune the proposed scheme, a stability analysis based on a discrete-time Lyapunov function has been used to determine the stability limits of the adaptation gain. Comparative evaluation results are presented to demonstrate the effectiveness of the proposed control scheme under different operating conditions. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4453985&sortType%3Das [...]

One day ahead prediction of wind speed and direction / El-Fouly, T.H.M. in IEEE transactions on energy conversion, Vol. 23 N°1 (Mars 2008) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 23 N°1 (Mars 2008) . - pp. 191 - 201 Titre : One day ahead prediction of wind speed and direction Type de document : texte imprimé Auteurs : El-Fouly, T.H.M., Auteur ; El-Saadany, E. F., Auteur ; Salama, M.M.A., Auteur Année de publication : 2008 Article en page(s) : pp. 191 - 201 Note générale : Energy conversion Langues : Anglais (eng) Mots-clés : Least  squares  approximations;  time  series;  wind  power Résumé : This paper presents a new technique for predicting wind speed and direction. This technique is based on using a linear time-series-based model relating the predicted interval to its corresponding one- and two-year old data. The accuracy of the model for predicting wind speeds and directions up to 24 h ahead have been investigated using two sets of data recorded during winter and summer season at Madison weather station. Generated results are compared with their corresponding values when using the persistent model. The presented results validate the effectiveness and accuracy of the proposed prediction model for wind speed and direction. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4433186&sortType%3Das [...] [article] One day ahead prediction of wind speed and direction [texte imprimé] / El-Fouly, T.H.M., Auteur ; El-Saadany, E. F., Auteur ; Salama, M.M.A., Auteur . - 2008 . - pp. 191 - 201. Energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 23 N°1 (Mars 2008) . - pp. 191 - 201 Mots-clés : Least  squares  approximations;  time  series;  wind  power Résumé : This paper presents a new technique for predicting wind speed and direction. This technique is based on using a linear time-series-based model relating the predicted interval to its corresponding one- and two-year old data. The accuracy of the model for predicting wind speeds and directions up to 24 h ahead have been investigated using two sets of data recorded during winter and summer season at Madison weather station. Generated results are compared with their corresponding values when using the persistent model. The presented results validate the effectiveness and accuracy of the proposed prediction model for wind speed and direction. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4433186&sortType%3Das [...]