Generalization of Wye and Delta auto-connections: Analysis of voltages and currents
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Data
2010-12-01
Autores
Da S. Oliveira, Priscila [UNESP]
Fernandes, Rodolfo C. [UNESP]
De Seixas, Falcondes J. M. [UNESP]
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Resumo
Multipulse rectifier topologies based on autoconnections, or differential connections, are more and more applied as interface stages between the mains and power converters. These topologies mitigate many low-order current harmonics in the utility, reducing the THD (total harmonic distortion) and increasing the power factor. This paper presents a mathematical model based on phasor diagrams, that results in a single expression able to unify all differential topologies connections (Delta and Wye), for both step-up or step-down autotransformers, for 12 and 18-pulse AC-DC converters. The proposed family of converters can be designed for any relationship between the input voltage and the load voltage. An immediate application would be the retrofit, i.e. to replace a conventional rectifier with poor quality of the processed energy by the 12 or 18 pulses rectifier with Wye or Delta-differential connection. The design procedure, simple and fast, is developed and tested for a prototype rating 6 kW and 250 V on the DC load © 2010 IEEE.
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Palavras-chave
18-pulse, Ac-dc converters, As interfaces, Current harmonics, DC load, Design procedure, Differential connection, Differential topology, Input voltages, Load voltages, Multi-pulse rectifiers, Phasor diagrams, Power factors, Total harmonic distortions, DC power transmission, Electric power factor correction, Mathematical models, Power converters, Retrofitting, Topology, Electric rectifiers
Como citar
2010 9th IEEE/IAS International Conference on Industry Applications, INDUSCON 2010.