Title :
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
fDate :
10/1/1997 12:00:00 AM
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;
Journal_Title :
Power Delivery, IEEE Transactions on
