Analysis and simulation to spurious operation of sensitive directional earth fault under load switching condition

Author

Shi, Shenxing ; Wixon, Alan ; Dong, Xinzhou ; Bo, ZQ ; Maytt, Andy ; Caunce, B.R.J.

Author_Institution

Dept. of Electr. Eng., Tsinghua Univ., Beijing, China

Volume

4

fYear

2002

fDate

2002

Firstpage

2561

Abstract

This paper presents the theoretical analysis of intermittent mal-operation of sensitive directional earth fault relays when switching off/on load and simulation tests based on Real Time Digital Simulator (RTDS). The magnitude of the residual current and voltage is dependent upon the load level and power factor, system source and line impedance´s, system capacitance to ground and the location of the open circuit. This paper analyses the effect of all electrical quantity to the problem. Based on the test results, the conclusion of mal-operation is drawn.

Keywords

earthing; load (electric); power system analysis computing; power system faults; power system protection; power system relaying; relay protection; switching; RTDS; Real Time Digital Simulator; computer simulation; intermittent mal-operation; load switching condition; open circuit; sensitive directional earth fault; Analytical models; Circuit faults; Circuit simulation; Circuit testing; Digital relays; Earth; Impedance; Power system relaying; Reactive power; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power System Technology, 2002. Proceedings. PowerCon 2002. International Conference on

Print_ISBN

0-7803-7459-2

Type

conf

DOI

10.1109/ICPST.2002.1047248

Filename

1047248