Title :
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
fDate :
5/1/2000 12:00:00 AM
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;
Journal_Title :
Power Engineering Review, IEEE
