Over-reaching factor for distance relay with Mho characteristic

Author

Shateri, H. ; Jamali, S.

Author_Institution

Iran Univ. of Sci. & Technol., Tehran

fYear

2007

fDate

4-6 Sept. 2007

Firstpage

333

Lastpage

337

Abstract

Fault resistance is a source of error for distance relays by the means of deviating the measured impedance from its actual value. The presence of the fault resistance not only leads to measured resistance deviation, but also the measured reactance deviates from its actual value. This would lead to both under-reaching and over-reaching. This paper investigates the over-reaching aspect by defining an over-reaching factor for Mho distance characteristics. Variation of this factor due to changes in the power system conditions is also discussed.

Keywords

earthing; electric resistance measurement; power system faults; power system protection; power system relaying; relay protection; Mho characteristic; distance relay; earth fault resistance; fault resistance; impedance measurement; over-reaching factor; power system; Circuit faults; Earth; Electrical resistance measurement; Impedance measurement; Power measurement; Power system faults; Power system measurements; Power system protection; Power system relaying; Protective relaying; Distance relay; Fault resistance; Measured impedance; Mho characteristic.; Over-reaching factor;

fLanguage

English

Publisher

ieee

Conference_Titel

Universities Power Engineering Conference, 2007. UPEC 2007. 42nd International

Conference_Location

Brighton

Print_ISBN

978-1-905593-36-1

Electronic_ISBN

978-1-905593-34-7

Type

conf

DOI

10.1109/UPEC.2007.4468970

Filename

4468970