Fault phase selection scheme of EHV/UHV transmission line protection for high-resistance faults

Author

Xu, Z.Y. ; Yan, X.Q. ; Ran, Li ; Zhang, Xiaobing

Author_Institution

Sch. of Electr. & Electron. Eng., North China Electr. Power Univ., Beijing, China

Volume

6

Issue

11

fYear

2012

fDate

11/1/2012 12:00:00 AM

Firstpage

1180

Lastpage

1187

Abstract

This study proposes a fault phase selection scheme for EHV/UHV transmission line protection during unbalanced faults. The scheme utilises the relative phase angle relationship between the negative and zero sequence currents and the fault impedance to identify the fault phase, providing particularly satisfactory tolerance towards high-fault resistance during normal operating situations and power swings. Real time digital simulator (RTDS) simulations demonstrate the outstanding performance of the proposed scheme in varying pre-fault system and fault conditions.

Keywords

power transmission faults; power transmission lines; EHV/UHV transmission line protection; fault conditions; fault impedance; fault phase selection scheme; high-fault resistance; high-resistance faults; negative sequence currents; normal operating situations; power swings; pre-fault system; real time digital simulator; relative phase angle relationship; unbalanced faults; zero sequence currents;

fLanguage

English

Journal_Title

Generation, Transmission & Distribution, IET

Publisher

iet

ISSN

1751-8687

Type

jour

DOI

10.1049/iet-gtd.2011.0860

Filename

6407177