A new principle for high resistance earth fault detection during fast power swings for distance protection

Author

Mechraoui, A. ; Thomas, D.W.P.

Author_Institution

Dept. of Electr. & Electron. Eng., Nottingham Univ., UK

Volume

12

Issue

4

fYear

1997

fDate

10/1/1997 12:00:00 AM

Firstpage

1452

Lastpage

1457

Abstract

The combined effects of a high impedance ground fault condition and a fast power swing condition cause the apparent impedance `seen´ by power system distance protection schemes to vary over a wide range. Previous research work has shown that the detection and location of high impedance faults during power swings is very difficult. A new principle for high impedance fault detection during fast power swings is presented which overcomes these deficiencies. This method forms a part of a complete power swing relaying scheme and can be implemented on standard relaying hardware. Results are presented based on extensive simulation studies carried out on a typical 400 kV transmission system, using the Electromagnetic Transient program (EMTP)

Keywords

earthing; electric impedance; fault location; power system analysis computing; power system protection; power system stability; software packages; transmission networks; 400 kV; Electromagnetic Transient program; computer simulation; fast power swings; high-resistance earth fault detection; power system distance protection; relaying hardware; transmission system; Circuit faults; EMTP; Earth; Electrical fault detection; Fault detection; Hardware; Impedance; Power system relaying; Protection; Voltage;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.634160

Filename

634160