Documents disponibles écrits par cet auteur

Modeling and control of grid-connected voltage-sourced converters under generalized unbalanced operation conditions / Jiabing Hu in IEEE transactions on energy conversion, Vol. 23 n°3 (Septembre 2008) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 23 n°3 (Septembre 2008) . - pp. 903 - 913 Titre : Modeling and control of grid-connected voltage-sourced converters under generalized unbalanced operation conditions Type de document : texte imprimé Auteurs : Jiabing Hu, Auteur ; Yikang, He, Auteur Année de publication : 2008 Article en page(s) : pp. 903 - 913 Note générale : Energy conversion Langues : Anglais (eng) Mots-clés : PWM  power  convertors;  power  grids Résumé : This paper proposes a unified mathematical model of a voltage-sourced converter (VSC) based on positive and negative synchronously rotating frames under both unbalanced grid supply and imbalanced input impedances. Based on the developed model, a new definition of instantaneous reactive power is introduced, and an accurate mathematical model of the instantaneous active and reactive powers at different locations of the VSC is derived. To avoid the use of band-trap filter for decomposing the positive- and negative-sequence dq components of current and voltage, a new control scheme with multifrequency proportional-resonant controller in the stationary alphabeta frame is employed to improve the steady state and dynamic response under generalized unbalanced operation conditions. Simulation and experimental studies with various factors were conducted and compared under different types of unbalanced conditions. The simulated and experimental results demonstrate that the proposed control scheme in the stationary alphabeta frame provides sufficiently steady-state tracking capability for ac input current, and a better transient response in compensation for wide-range generalized unbalanced operation conditions. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4505421&sortType%3Das [...] [article] Modeling and control of grid-connected voltage-sourced converters under generalized unbalanced operation conditions [texte imprimé] / Jiabing Hu, Auteur ; Yikang, He, Auteur . - 2008 . - pp. 903 - 913. Energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 23 n°3 (Septembre 2008) . - pp. 903 - 913 Mots-clés : PWM  power  convertors;  power  grids Résumé : This paper proposes a unified mathematical model of a voltage-sourced converter (VSC) based on positive and negative synchronously rotating frames under both unbalanced grid supply and imbalanced input impedances. Based on the developed model, a new definition of instantaneous reactive power is introduced, and an accurate mathematical model of the instantaneous active and reactive powers at different locations of the VSC is derived. To avoid the use of band-trap filter for decomposing the positive- and negative-sequence dq components of current and voltage, a new control scheme with multifrequency proportional-resonant controller in the stationary alphabeta frame is employed to improve the steady state and dynamic response under generalized unbalanced operation conditions. Simulation and experimental studies with various factors were conducted and compared under different types of unbalanced conditions. The simulated and experimental results demonstrate that the proposed control scheme in the stationary alphabeta frame provides sufficiently steady-state tracking capability for ac input current, and a better transient response in compensation for wide-range generalized unbalanced operation conditions. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4505421&sortType%3Das [...]

Reinforced control and operation of DFIG-based wind-power-generation system under unbalanced grid voltage conditions / Jiabing Hu in IEEE transactions on energy conversion, Vol. 24 N° 4 (Décembre 2009) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 905 - 915 Titre : Reinforced control and operation of DFIG-based wind-power-generation system under unbalanced grid voltage conditions Type de document : texte imprimé Auteurs : Jiabing Hu, Auteur ; Yikang, He, Auteur Année de publication : 2010 Article en page(s) : pp. 905 - 915 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Asynchronous  machines;  machine  control;  power  generation  control;  wind  power Résumé : This paper proposes an enhanced control and operation of a doubly fed induction generator (DFIG) based wind power generation system under unbalanced grid voltage conditions. System behaviors of grid-side and rotor-side converters (GSCs and RSCs) are described. The RSC is controlled to eliminate the electromagnetic torque oscillation at double the grid frequency. Meanwhile, three selective control targets for the GSC, i.e., reducing the pulsations in the total active or reactive power, or unbalanced current outputs from the overall system, are identified and analyzed during voltage imbalance. A new current-control scheme is presented for the GSC and RSC without involving the decomposing of positive and negative sequence currents. The controller consists of a proportional (P) regulator and a resonant (R) one tuned at the grid frequency, which is implemented in the stator stationary reference frame. Finally, simulation studies are carried out on a 1.5-MW wind-turbine-driven DFIG system. The validity of the presented current controller and the feasibility of the proposed control targets are all confirmed by the simulated results. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5336284&sortType%3Das [...] [article] Reinforced control and operation of DFIG-based wind-power-generation system under unbalanced grid voltage conditions [texte imprimé] / Jiabing Hu, Auteur ; Yikang, He, Auteur . - 2010 . - pp. 905 - 915. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 24 N° 4 (Décembre 2009) . - pp. 905 - 915 Mots-clés : Asynchronous  machines;  machine  control;  power  generation  control;  wind  power Résumé : This paper proposes an enhanced control and operation of a doubly fed induction generator (DFIG) based wind power generation system under unbalanced grid voltage conditions. System behaviors of grid-side and rotor-side converters (GSCs and RSCs) are described. The RSC is controlled to eliminate the electromagnetic torque oscillation at double the grid frequency. Meanwhile, three selective control targets for the GSC, i.e., reducing the pulsations in the total active or reactive power, or unbalanced current outputs from the overall system, are identified and analyzed during voltage imbalance. A new current-control scheme is presented for the GSC and RSC without involving the decomposing of positive and negative sequence currents. The controller consists of a proportional (P) regulator and a resonant (R) one tuned at the grid frequency, which is implemented in the stator stationary reference frame. Finally, simulation studies are carried out on a 1.5-MW wind-turbine-driven DFIG system. The validity of the presented current controller and the feasibility of the proposed control targets are all confirmed by the simulated results. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5336284&sortType%3Das [...]