INVESTIGATION OF IMPEDANCE-DIFFERENTIAL PROTECTION’S ALGORITHM AS A FAULT LOCATOR FOR DOUBLE-CIRCUIT TRANSMISSION LINE

• Main Authors: Ю. Герлендер, Я. Ижиковски, Б. Брусилович
• Format: Article
• Language: English
• Published: NAS of Ukraine, Institute of elecrodynamics 2020-10-01
• Series: Технічна електродинаміка
• Subjects: double-circuit line; transmission line; fault location; atp-emtp; simulation; algorithm; negative and zero sequences
• Online Access: https://techned.org.ua/index.php/techned/article/view/30

This paper deals with an analysis of impedance-differential protection algorithm applied to locate faults on a double-circuit transmission line. In particular, the study of fault location accuracy for the case of using the relation between currents for negative-sequence not for zero-sequence, as it was presented so far, is provided. It results from the well-known fact that zero-sequence impedances are in practice considered as quite unreliable data. Therefore, one has to limit usage of zero-sequence impedance parameters as much as possible. Such approach was applied in this paper and therefore the  use of the additional relation of currents for negative-sequence is under investigation. The fault signals from ATP-EMTP simulation on the sample double-circuit transmission line was applied for evaluating the fault location accuracy. References 8, figures 4, table 1.