DocumentCode :
2593540
Title :
Optimization of multipulse converters with delta and Y-differential connections
Author :
Oliveira, Priscila Da Silva ; De Seixas, Falcondes J Mendes ; Fernandes, Rodolfo Castanho
Author_Institution :
Fac. de Eng. de Ilha Solteira, UNESP, Ilha Solteira, Brazil
fYear :
2009
fDate :
Sept. 27 2009-Oct. 1 2009
Firstpage :
901
Lastpage :
907
Abstract :
This work presents a study regarding the optimization of multipulse converters. A general expression for the connection (¿ or Y) for both 12 and 18-pulses is obtained and describes the output voltages on the secondary windings, depending on the voltage reference from the primary. These generalized expressions allows choosing different ratios between input and output voltages and as result an optimum operation point for the converter can be calculated. Considering ¿-connected converters the optimum point occurs when the magnetic core of the autotransformer processes 18% and 17% of the output power for 12 and 18-pulses, respectively. For Y-connected converters the optimum point occurs when the kVA rating is 13% and 18% for 12 and 18-pulses, respectively. Based on these results magnetic elements can be calculated and designed leading to a great weight and volume reduction and also to lower costs and losses. Finally an analysis is made to improve the kVA rating of the transformers for 12 and 18 pulses converters.
Keywords :
autotransformers; harmonics suppression; power convertors; transformer windings; Y-connected converters; Y-differential connections; autotransformer processes; delta connections; multipulse converters optimization; secondary windings; voltage reference; ¿-connected converters; Circuit topology; Costs; Genetic expression; Power generation; Power harmonic filters; Power system harmonics; Reactive power; Rectifiers; Transformers; Voltage; autotransformer; differential connection; multipulse converter; reduction of harmonics;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Electronics Conference, 2009. COBEP '09. Brazilian
Conference_Location :
Bonito-Mato Grosso do Sul
ISSN :
2175-8603
Print_ISBN :
978-1-4244-3369-8
Electronic_ISBN :
2175-8603
Type :
conf
DOI :
10.1109/COBEP.2009.5347706
Filename :
5347706
Link To Document :
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