A Monovoltage Equivalent Model of Bi-Voltage Autotransformer-Based Electrical Systems in Railways

Author

Pilo, Eduardo ; Rouco, Luis ; Fernández, Antonio ; Abrahamsson, Lars

Author_Institution

Inst. de Investig. Tecnol. (IIT), Univ. Pont. Comillas de Madrid, Madrid, Spain

Volume

27

Issue

2

fYear

2012

fDate

4/1/2012 12:00:00 AM

Firstpage

699

Lastpage

708

Abstract

This paper presents an equivalent model that allows representing bi-voltage autotransformer-based systems (such as 2 × 25 kV ac, 2 × 15 kV ac) as if they were monovoltage systems. This model can be used for symmetrical (such as 2 × 25-kV 50-Hz systems) and unsymmetrical (such as 12/24-kV 25-Hz systems) configurations. It is based on two simplifying hypotheses that establish relationships between currents and voltages in the positive and negative phases. These hypotheses are discussed and the accuracy of the model is evaluated by comparing the results with a detailed conventional model of power-supply systems.

Keywords

autotransformers; power supplies to apparatus; railways; bivoltage autotransformer-based electrical systems; hypotheses simplification; monovoltage equivalent model; negative phases; positive phases; power-supply systems; railways; symmetrical configurations; unsymmetrical configurations; Conductors; Equations; Impedance; Integrated circuit modeling; Mathematical model; Rail transportation; Substations; Power system modeling; rail transportation power system;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2011.2179814

Filename

6172985