Documents disponibles écrits par cet auteur

A series-dynamic-resistor-based converter protection scheme for doubly-fed induction generator during various fault conditions / Jin Yang in IEEE transactions on energy conversion, Vol. 25 N° 2 (Juin 2010) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 25 N° 2 (Juin 2010) . - pp. 422 - 432 Titre : A series-dynamic-resistor-based converter protection scheme for doubly-fed induction generator during various fault conditions Type de document : texte imprimé Auteurs : Jin Yang, Auteur ; Fletcher, J.E., Auteur ; O'Reilly, J., Auteur Année de publication : 2010 Article en page(s) : pp. 422 - 432 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : DC  motor  protection;  asynchronous  generators;  machine  control;  overcurrent  protection;  power  system  CAD Résumé : This paper proposes a new converter protection method, primarily based on a series dynamic resistor (SDR) that avoids the doubly-fed induction generator (DFIG) control being disabled by crowbar protection during fault conditions. A combined converter protection scheme based on the proposed SDR and conventional crowbar is analyzed and discussed. The main protection advantages are due to the series topology when compared with crowbar and dc-chopper protection. Various fault overcurrent conditions (both symmetrical and asymmetrical) are analyzed and used to design the protection in detail, including the switching strategy and coordination with crowbar, and resistance value calculations. PSCAD/EMTDC simulation results show that the proposed method is advantageous for fault overcurrent protection, especially for asymmetrical faults, in which the traditional crowbar protection may malfunction. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5404230&sortType%3Das [...] [article] A series-dynamic-resistor-based converter protection scheme for doubly-fed induction generator during various fault conditions [texte imprimé] / Jin Yang, Auteur ; Fletcher, J.E., Auteur ; O'Reilly, J., Auteur . - 2010 . - pp. 422 - 432. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 25 N° 2 (Juin 2010) . - pp. 422 - 432 Mots-clés : DC  motor  protection;  asynchronous  generators;  machine  control;  overcurrent  protection;  power  system  CAD Résumé : This paper proposes a new converter protection method, primarily based on a series dynamic resistor (SDR) that avoids the doubly-fed induction generator (DFIG) control being disabled by crowbar protection during fault conditions. A combined converter protection scheme based on the proposed SDR and conventional crowbar is analyzed and discussed. The main protection advantages are due to the series topology when compared with crowbar and dc-chopper protection. Various fault overcurrent conditions (both symmetrical and asymmetrical) are analyzed and used to design the protection in detail, including the switching strategy and coordination with crowbar, and resistance value calculations. PSCAD/EMTDC simulation results show that the proposed method is advantageous for fault overcurrent protection, especially for asymmetrical faults, in which the traditional crowbar protection may malfunction. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5404230&sortType%3Das [...]

Study on Mg2+ removal from ammonium dihydrogen phosphate solution by predispersed solvent extraction / JianHong Luo in Industrial & engineering chemistry research, Vol. 48 N°4 (Février 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2056–2060 Titre : Study on Mg2+ removal from ammonium dihydrogen phosphate solution by predispersed solvent extraction Type de document : texte imprimé Auteurs : JianHong Luo, Auteur ; Jun Li, Auteur ; Jin Yang, Auteur Année de publication : 2009 Article en page(s) : p. 2056–2060 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Mg2+  Predispersed  solvent  extraction  Aqueous  solution  Colloidal  liquid  aphrons Résumé : The predispersed solvent extraction (PDSE) is a new method for separating solutes from aqueous solution, and for its high extraction ratio, the PDSE presents huge potential for the extraction from dilute solution. In the present paper, colloidal liquid aphrons are successfully generated using kerosene as a solvent, di(2-ethylhexyl)phosphoric acid (D2EHPA) as an extractant, sodium dodecyl benzene sulfate (SDBS) as surfactant in the aqueous phase, and polyoxyethylene sorbitol anhydride monolaurate (Tween-20) in oil phase. The extraction of Mg2+ from ammonium dihydrogen phosphate solution is studied by using colloidal liquid aphrons (CLA) and colloidal gas aphrons (CGA) in a semibatch extraction column. To study the extraction ratio and advantages of the PDSE process in the removal of Mg2+, various parameters, initial Mg2+ concentration, D2EHPA volume fraction, reaction temperature, phase volume ratio, mass fractions of dodecyl trimethylammonium bromide (HTAB), mass fractions of SDBS, mass fractions of Tween-20, and initial pH of NH4H2PO4 solution, are studied and optimized. The results show that Mg2+ in NH4H2PO4 solution can be effectively removed by the PDSE process. An extraction ratio of more than 86.3% is attained at the optimized parameters, and superior-grade NH4H2PO4 (MAP) can be obtained by two levels of extraction. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801277t [article] Study on Mg2+ removal from ammonium dihydrogen phosphate solution by predispersed solvent extraction [texte imprimé] / JianHong Luo, Auteur ; Jun Li, Auteur ; Jin Yang, Auteur . - 2009 . - p. 2056–2060. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2056–2060 Mots-clés : Mg2+  Predispersed  solvent  extraction  Aqueous  solution  Colloidal  liquid  aphrons Résumé : The predispersed solvent extraction (PDSE) is a new method for separating solutes from aqueous solution, and for its high extraction ratio, the PDSE presents huge potential for the extraction from dilute solution. In the present paper, colloidal liquid aphrons are successfully generated using kerosene as a solvent, di(2-ethylhexyl)phosphoric acid (D2EHPA) as an extractant, sodium dodecyl benzene sulfate (SDBS) as surfactant in the aqueous phase, and polyoxyethylene sorbitol anhydride monolaurate (Tween-20) in oil phase. The extraction of Mg2+ from ammonium dihydrogen phosphate solution is studied by using colloidal liquid aphrons (CLA) and colloidal gas aphrons (CGA) in a semibatch extraction column. To study the extraction ratio and advantages of the PDSE process in the removal of Mg2+, various parameters, initial Mg2+ concentration, D2EHPA volume fraction, reaction temperature, phase volume ratio, mass fractions of dodecyl trimethylammonium bromide (HTAB), mass fractions of SDBS, mass fractions of Tween-20, and initial pH of NH4H2PO4 solution, are studied and optimized. The results show that Mg2+ in NH4H2PO4 solution can be effectively removed by the PDSE process. An extraction ratio of more than 86.3% is attained at the optimized parameters, and superior-grade NH4H2PO4 (MAP) can be obtained by two levels of extraction. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801277t