The phasor combination differential protection for Le-Blanc transformers

Author

Lu, Kwang-Chang ; Chen, Naming

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Inst. of Technol., Taipei, Taiwan

Volume

12

Issue

4

fYear

1997

fDate

10/1/1997 12:00:00 AM

Firstpage

1434

Lastpage

1438

Abstract

The main electrical protection of Le-Blanc connection transformers that supply the single-phase power to the electric railway in Taiwan is the overcurrent protection. This paper presents a more complete protective scheme, the differential protection, for Le-Blanc by phasor combination method. The calculation procedure and the good mismatch results of a practical design example using the parameters of a Le-Blanc transformer of Taiwan Railway Bureau (Tairail) are described in this paper. In addition, using the normal current transformers and electromagnetic type transformer differential relays to completely construct the protective scheme is another merit of this algorithm

Keywords

current transformers; power system protection; power transformers; railways; relay protection; Le-Blanc transformers; Tairail; Taiwan; Taiwan Railway Bureau; connection transformers; current transformers; electric railway; electromagnetic type transformer differential relays; phasor combination differential protection; single-phase power supply; Algorithm design and analysis; Current transformers; Equations; Power supplies; Power system protection; Power transformers; Protective relaying; Rail transportation; Railway engineering; Voltage;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.634157

Filename

634157