Calculation of optimum directional overcurrent relays settings: the parallel lines case

Author

Perez, Luis G. ; Urdaneta, Alberto J.

Author_Institution

Simon Bolivar Univ., Caracas, Venezuela

Volume

20

Issue

5

fYear

2000

fDate

5/1/2000 12:00:00 AM

Firstpage

68

Lastpage

69

Abstract

A simple and practical criterion is proposed to consider the transient changes due to nonsimultaneous operation of directional overcurrent relays in parallel lines. The criterion consists of using two different time coordination intervals: one for relay coordination pairs that do not belong to parallel lines and another for pairs belonging to parallel lines. The method can be implemented in programs that use the optimization technique for the calculation of relay settings. Numerical results showing the performance of the method are also presented

Keywords

overcurrent protection; power system protection; power system transients; relay protection; nonsimultaneous operation; optimum directional overcurrent relays settings; parallel lines; relay coordination; relay coordination pairs; time coordination intervals; transient changes; Batteries; Capacitors; Computer aided software engineering; Energy storage; Flywheels; Lakes; Protective relaying; Relays; Samarium; Tires;

fLanguage

English

Journal_Title

Power Engineering Review, IEEE

Publisher

ieee

ISSN

0272-1724

Type

jour

DOI

10.1109/39.841356

Filename

841356