Documents disponibles écrits par cet auteur

Flicker mitigation by active power control of variable-speed wind turbines with full-scale back-to-back power converters / Weihao Hu 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. 640 - 649 Titre : Flicker mitigation by active power control of variable-speed wind turbines with full-scale back-to-back power converters Type de document : texte imprimé Auteurs : Weihao Hu, Auteur ; Zhe, Chen, Auteur ; Yue Wang, Auteur Année de publication : 2010 Article en page(s) : pp. 640 - 649 Note générale : Energy Conversion Langues : Anglais (eng) Mots-clés : Power  convertors--Power  system  CAD--Reactive  power  control--Wind  turbines Résumé : Grid-connected wind turbines are fluctuating power sources that may produce flicker during continuous operation. This paper presents a simulation model of a megawatt-level variable-speed wind turbine with a full-scale back-to-back power converter developed in the simulation tool of PSCAD/EMTDC. Flicker emission of this system is investigated. Reactive power compensation is mostly adopted for flicker mitigation. However, the flicker mitigation technique shows its limits, when the grid impedance angle is low in some distribution networks. A new method of flicker mitigation by controlling active power is proposed. It smoothes the 3p active power oscillations from wind shear and tower shadow effects of the wind turbine by varying the dc-link voltage of the full-scale converter. Simulation results show that damping the 3p active power oscillation by using the flicker mitigation controller is an effective means for flicker mitigation of variable-speed wind turbines with full-scale back-to-back power converters during continuous operation. Note de contenu : Bibiogr. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5071239&sortType%3Das [...] [article] Flicker mitigation by active power control of variable-speed wind turbines with full-scale back-to-back power converters [texte imprimé] / Weihao Hu, Auteur ; Zhe, Chen, Auteur ; Yue Wang, Auteur . - 2010 . - pp. 640 - 649. Energy Conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 24 N° 3 (Septembre 2009) . - pp. 640 - 649 Mots-clés : Power  convertors--Power  system  CAD--Reactive  power  control--Wind  turbines Résumé : Grid-connected wind turbines are fluctuating power sources that may produce flicker during continuous operation. This paper presents a simulation model of a megawatt-level variable-speed wind turbine with a full-scale back-to-back power converter developed in the simulation tool of PSCAD/EMTDC. Flicker emission of this system is investigated. Reactive power compensation is mostly adopted for flicker mitigation. However, the flicker mitigation technique shows its limits, when the grid impedance angle is low in some distribution networks. A new method of flicker mitigation by controlling active power is proposed. It smoothes the 3p active power oscillations from wind shear and tower shadow effects of the wind turbine by varying the dc-link voltage of the full-scale converter. Simulation results show that damping the 3p active power oscillation by using the flicker mitigation controller is an effective means for flicker mitigation of variable-speed wind turbines with full-scale back-to-back power converters during continuous operation. Note de contenu : Bibiogr. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5071239&sortType%3Das [...]

Operating Energy Consumption Analysis of RO Desalting System / Bingwei Qi in Industrial & engineering chemistry research, Vol. 51 N° 43 (Octobre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 43 (Octobre 2012) . - pp. 14135-14144 Titre : Operating Energy Consumption Analysis of RO Desalting System : Effect of Membrane Process and Energy Recovery Device (ERD) Performance Variables Type de document : texte imprimé Auteurs : Bingwei Qi, Auteur ; Yue Wang, Auteur ; Shichang Xu, Auteur Année de publication : 2013 Article en page(s) : pp. 14135-14144 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Energy  recovery  Desalination  Energy  consumption Résumé : Significant improvement in reverse osmosis (RO) membrane permeability makes the emergence of thermodynamic restriction in desalting process. Due to the filtration flux, both the accumulation of rejected solute and the subsequent concentration polarization layer contribute to the transmembrane osmotic pressure difference that needs to be overcome by the applied pressure. A theoretically derived formula predicting the permeate flux accounting for pressure drop, effect of applied pressure on solute rejection and concentration polarization is presented, and the obtained average rejection is used to calculate the operating energy consumption of RO process more accurately. On the basis of theoretical considerations, at the limit imposed by thermodynamic restriction, an energy consuming analysis model of RO process was developed to study the effects of RO operating parameters (e.g., recovery rate), energy recovery devices (ERDs) performance variables (efficiency and leakage ratio), and pump efficiencies on the specific energy consumption (SEC). ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26593341 [article] Operating Energy Consumption Analysis of RO Desalting System : Effect of Membrane Process and Energy Recovery Device (ERD) Performance Variables [texte imprimé] / Bingwei Qi, Auteur ; Yue Wang, Auteur ; Shichang Xu, Auteur . - 2013 . - pp. 14135-14144. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 43 (Octobre 2012) . - pp. 14135-14144 Mots-clés : Energy  recovery  Desalination  Energy  consumption Résumé : Significant improvement in reverse osmosis (RO) membrane permeability makes the emergence of thermodynamic restriction in desalting process. Due to the filtration flux, both the accumulation of rejected solute and the subsequent concentration polarization layer contribute to the transmembrane osmotic pressure difference that needs to be overcome by the applied pressure. A theoretically derived formula predicting the permeate flux accounting for pressure drop, effect of applied pressure on solute rejection and concentration polarization is presented, and the obtained average rejection is used to calculate the operating energy consumption of RO process more accurately. On the basis of theoretical considerations, at the limit imposed by thermodynamic restriction, an energy consuming analysis model of RO process was developed to study the effects of RO operating parameters (e.g., recovery rate), energy recovery devices (ERDs) performance variables (efficiency and leakage ratio), and pump efficiencies on the specific energy consumption (SEC). ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26593341

Performance-based procedure for direct displacement design of engineered wood-frame structures / Yue Wang in Journal of structural engineering, Vol. 136 N° 8 (Août 2010) 

Public ISBD [article]  in Journal of structural engineering > Vol. 136 N° 8 (Août 2010) . - pp. 978-988 Titre : Performance-based procedure for direct displacement design of engineered wood-frame structures Type de document : texte imprimé Auteurs : Yue Wang, Auteur ; David V. Rosowsky, Auteur ; Weichiang Pang, Auteur Année de publication : 2011 Article en page(s) : pp. 978-988 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Direct  displacement  design  Performance-based  design  Seismic  design  Wood  shear  wall  Wood-frame  structures Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper reports on a study to extend a recently proposed direct displacement design (DDD) procedure for midrise engineered wood-frame structures and develop a set of factors for use in the procedure to meet specified performance levels with certain target probabilities. Representative index multistory building configurations were selected from the archetype buildings developed for the FEMA ATC-63. Seismic hazard levels and performance requirements recommended by ASCE 41-06 and modified for use in the National Science Foundation sponsored NEESWood project were used. The archetype buildings, originally designed using current force-based design procedures, were redesigned using the simplified DDD procedure (also described herein) with a range of nonexceedance (NE) probability adjustment factors (CNE). Specifically, the design interstory shear forces and the sheathing nail spacings were determined for each structure designed using CNE. Nonlinear time-history analysis was performed for each archetype structure under the 2%/50 year seismic hazard level and peak interstory drift distributions were developed. The NE probability at the 4% drift limit was then plotted against building height and design charts were developed for each different value of CNE. Given the building height and desired NE probability, engineers/designers can select the appropriate minimum value of CNE using these charts. Additional analyses could be performed to consider other hazard levels and performance requirements. Using design charts of this type, engineers/designers are able to specify a target drift limit as well as a target NE probability when using the simplified DDD procedure. Thus, a true performance-based procedure for the seismic design of midrise wood-frame structures is described. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v136/i8/p978_s1?isAuthorized=no [article] Performance-based procedure for direct displacement design of engineered wood-frame structures [texte imprimé] / Yue Wang, Auteur ; David V. Rosowsky, Auteur ; Weichiang Pang, Auteur . - 2011 . - pp. 978-988. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 136 N° 8 (Août 2010) . - pp. 978-988 Mots-clés : Direct  displacement  design  Performance-based  design  Seismic  design  Wood  shear  wall  Wood-frame  structures Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper reports on a study to extend a recently proposed direct displacement design (DDD) procedure for midrise engineered wood-frame structures and develop a set of factors for use in the procedure to meet specified performance levels with certain target probabilities. Representative index multistory building configurations were selected from the archetype buildings developed for the FEMA ATC-63. Seismic hazard levels and performance requirements recommended by ASCE 41-06 and modified for use in the National Science Foundation sponsored NEESWood project were used. The archetype buildings, originally designed using current force-based design procedures, were redesigned using the simplified DDD procedure (also described herein) with a range of nonexceedance (NE) probability adjustment factors (CNE). Specifically, the design interstory shear forces and the sheathing nail spacings were determined for each structure designed using CNE. Nonlinear time-history analysis was performed for each archetype structure under the 2%/50 year seismic hazard level and peak interstory drift distributions were developed. The NE probability at the 4% drift limit was then plotted against building height and design charts were developed for each different value of CNE. Given the building height and desired NE probability, engineers/designers can select the appropriate minimum value of CNE using these charts. Additional analyses could be performed to consider other hazard levels and performance requirements. Using design charts of this type, engineers/designers are able to specify a target drift limit as well as a target NE probability when using the simplified DDD procedure. Thus, a true performance-based procedure for the seismic design of midrise wood-frame structures is described. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v136/i8/p978_s1?isAuthorized=no