Open AccessUniversal pilot relaying scheme for series and shunt‐compensated lines
Author(s) -
Gupta Om Hari,
Tripathy Manoj
Publication year - 2018
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2017.0814
Subject(s) - electric power transmission , control theory (sociology) , shunt (medical) , computer science , fault (geology) , protective relay , power (physics) , electric power system , algorithm , electronic engineering , topology (electrical circuits) , engineering , electrical engineering , physics , medicine , control (management) , artificial intelligence , quantum mechanics , seismology , geology , cardiology
The fault component power and energy‐based relaying schemes find limitation during the double phase to ground faults due to the effect of mutual coupling. In this study, a pilot relaying scheme for series and shunt‐compensated transmission lines is introduced which is based on incremental reactive power coefficients (IRPCs). The IRPC of a phase is defined as the ratio of integrated incremental reactive power (IIRP) to the maximum magnitude of IIRP among all three phases. If IRPC of any phase is found less than −0.5, the internal fault is detected else if none of the phases has IRPC less than −0.5, the fault is an external fault. The algorithm will start only if the incremental differential current of any phase is found >50% of pre‐fault differential current. The proposed scheme has various advantages including universal applicability to protect the series and shunt‐compensated transmission lines. The offline and real‐time simulations are carried out to investigate the performance of the proposed scheme under different operating conditions. The scheme is robust and accurate for all the conditions. Further, the performance of the proposed scheme is superior to the recently proposed schemes.