Optimal computation of distance relays second zone timing in a mixed protection scheme with directional overcurrent relays

Author

Pérez, Luis G. ; Urdaneta, Alberto J.

Author_Institution

Univ. Simon Bolivar, Caracas, Venezuela

Volume

16

Issue

3

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

385

Lastpage

388

Abstract

This paper describes a technique to determine the optimal time setting for the second zone of distance relays when used in a mixed protection scheme with directional overcurrent relays. The technique consists of including the second zone operation time as a new variable in the original problem statement of optimal computation of directional overcurrent relays settings. It is shown that the influence of distance relays and directional overcurrent relays must be considered when the settings of these relays are computed. Numerical results obtained with the proposed method for a realistic power system are presented

Keywords

overcurrent protection; power system faults; power system protection; power system relaying; relay protection; timing; directional overcurrent relays; distance relays second zone timing calculation; mixed protection scheme; power systems; problem statement; Circuit breakers; Circuit faults; Equations; Helium; Linear programming; Power system protection; Power system relaying; Protective relaying; Relays; Timing;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.924815

Filename

924815