Effects of frequency dependence and line parameters on single ended travelling wave based fault location schemes

Author

Ancell, G.B. ; Pahalawaththa, N.C.

Author_Institution

Dept. of Electr. & Electron. Eng., Auckland Univ., New Zealand

Volume

139

Issue

4

fYear

1992

fDate

7/1/1992 12:00:00 AM

Firstpage

332

Lastpage

342

Abstract

The effects of frequency dependence, line asymmetry, and varying ground conductivity on ultrahigh speed, travelling wave based, single ended, protection schemes are investigated. Typical schemes assume the transmission lines to be balanced and frequency independent which simplifies the analysis of the fault transients. Investigation of a single circuit vertically configured transmission line reveals that better results can be obtained by using modal parameters based on the configuration of the transmission line. The problem of modal mixing at discontinuities on the transmission line is demonstrated in the case of an unbalanced line to ground fault. The results described have applications in both protection and fault location schemes

Keywords

fault location; power system protection; power transmission lines; fault location; frequency dependence; line asymmetry; line parameters; modal mixing; modal parameters; protection; single circuit; single ended travelling wave; transmission lines; unbalanced line; varying ground conductivity; vertically configured transmission line;

fLanguage

English

Journal_Title

Generation, Transmission and Distribution, IEE Proceedings C

Publisher

iet

ISSN

0143-7046

Type

jour

Filename

149577