Multi-purpose balanced transformer with harmonic eliminating capability for railway traction applications

Author

Zhang, Zhiwen ; Wu, Bin ; Luo, Longfu ; Zhou, Lawu ; Liu, Fusheng

Author_Institution

Coll. of Electr. & Inf. Eng., Hunan Univ., Changsha

fYear

2008

fDate

20-24 July 2008

Firstpage

1

Lastpage

8

Abstract

A multi-purpose balanced (MPB) transformer is proposed in this paper for electric railway applications. The MPB transformer is developed from impedance-matching (IM) transformers widely used in Chinapsilas railway systems. The proposed MPB transformer has three main functions: (1) it provides a symmetrical two-phase voltage of 27.5 kV for railway overhead lines to power electric trains, (2) it supplies a three-phase balanced voltage of 10.5 kV for railway substations, and (3) it can accommodate a three-phase harmonic filter with improved power factor and reduced manufacturing cost. In this paper, the operating principles of the MPB transformer are elaborated, the design of the harmonic filters is discussed, and the results of computer simulations are provided. A 16 MVA MPB transformer was designed and commissioned, and real-time field measurements are provided.

Keywords

power harmonic filters; railway electrification; reactive power; traction; transformer substations; apparent power 16 MVA; electric railway traction applications; harmonic eliminating capability; impedance-matching transformers; manufacturing cost reduction; multipurpose balanced transformer; power electric trains; power factor; railway overhead lines; railway substations; symmetrical two-phase voltage; three-phase harmonic filter; voltage 10.5 kV; voltage 27.5 kV; Educational institutions; Harmonic filters; Impedance; Power engineering and energy; Power harmonic filters; Power transformer insulation; Rail transportation; Railway engineering; Reactive power; Substations; Balanced transformers; Harmonic filters; Railway substations; Reactive power compensation; Traction drives;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008 IEEE

Conference_Location

Pittsburgh, PA

ISSN

1932-5517

Print_ISBN

978-1-4244-1905-0

Electronic_ISBN

1932-5517

Type

conf

DOI

10.1109/PES.2008.4596107

Filename

4596107