Title :
Evaluation of uncertainties in double line distance relaying. A global sight
Author :
Agrasar, M. ; Uriondo, F. ; Hernandez, J.R.
Author_Institution :
Dept. of Electr. Eng., Univ. of the Basque Country, San Sebastian, Spain
fDate :
10/1/1998 12:00:00 AM
Abstract :
Uncertainty sources, when relaying double lines with distance relays, during simple or intercircuit faults, are evaluated. Tendencies on errors and their magnitude are easily viewed in a forward reach settings vs. real fault distance covered plane. Contributions of different factors are separated and relations among them are established using the mentioned plane. Desired situations to be evaluated include any type of fault, for any previous state and any fault resistance, as well as any type of distance unit. The intent of the analysis presented is not only to evaluate known tendencies of distance relay responses, in double or single lines, but also to identify the causes and to show the usefulness of the employed methodology for any other type of study to be performed when calculating settings, analysing or designing the best protection philosophy in double or single lines
Keywords :
power system protection; power system relaying; relay protection; distance relay responses; distance unit; double line distance relaying; fault resistance; forward reach settings; intercircuit faults; real fault distance covered plane; uncertainties evaluation; Circuit faults; Circuit topology; Mutual coupling; Performance analysis; Performance evaluation; Power system relaying; Protection; Protective relaying; Relays; Uncertainty;
Journal_Title :
Power Delivery, IEEE Transactions on