Backup Protection for Six-Phase Transformer Based on Six-Sequence Components

Article Preview

Abstract:

The six-phase transmission can improve the power transmission density of the transmission lines effectively, and save line corridor. To save the problem that the sensitivity of the traditional transformer backup protection is low in six-phase transmission system, a backup protection for six-phase transformer was proposed. An over-current protection criterion is proposed for interphase short circuit and opposite zero sequence over-current protection criterion is proposed for ground faults, based on the six-sequence components relationship, and the existence of six-sequence components in different fault types. Theoretical analysis and EMTDC simulation experiments prove that the scheme is feasible.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

1127-1130

Citation:

Online since:

August 2013

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2013 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] C. M. Portela, M. C. Tavares. Six-phase transmission line propagation characteristics and new three-phase representation. IEEE Transaction on Power Delivery, 1993, 8 (3):1470-1483.

DOI: 10.1109/61.252674

Google Scholar

[2] Zhao Qingming, He Jiali, Mou Dunkang, et al. Study on UHV six-phase transmission lines characteristics. Electric Power. 2007, 40(8):40-44.

Google Scholar

[3] Jin Yixiong, Cheng Haozhong. Fault calculation method for six-phase transmission system. Relay. 2005, 33(1):10-15.

Google Scholar

[4] Zhang Yanxia, Wang Yan, Wu Shi. Phase-selection for six-phase power transmission system based on six-sequence components method. Automation of Electric Power System. 2009, 33(24):49-53.

Google Scholar

[5] Ge Yaozhong. New types of protective relaying and fault location theory and techniques . Xi'an: Xi'an Jiaotong University Press, (1996).

Google Scholar

[6] Wu Shi. Fault Analysis of Six-phase Transmission System. Tianjin: School of  Electrical Engineering &Automation, Tianjin University, (2008).

Google Scholar