Open AccessResilient protection scheme preserving system integrity during stressed condition
Author(s) -
Paladhi Subhadeep,
Pradhan Ashok Kumar
Publication year - 2019
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.2018.5513
Subject(s) - tripping , blackout , relay , protective relay , electric power system , scheme (mathematics) , system integrity , computer science , power system protection , transmission (telecommunications) , electric power transmission , reliability engineering , control theory (sociology) , power (physics) , engineering , electrical engineering , circuit breaker , telecommunications , control (management) , mathematical analysis , physics , mathematics , quantum mechanics , artificial intelligence
During stressed system condition, power flow in transmission lines may substantiate and affect seen impedance of distance relay resulting in maloperation. Such a situation may initiate cascaded tripping leading to blackout. Proper coordinated blocking and tripping schemes of distance relays become essential to avoid such a relay malfunction and thus preserving system integrity. In this study, a resilient protection scheme is proposed employing adaptive zone‐1 setting, thereby preventing relay maloperation during stressed system condition. The scheme uses a prefault data of both end distance relays to accomplish the proposed adaptive relay setting for the purpose. The performance of the proposed scheme is tested on the IEEE 118 bus system using PSCAD/EMTDC simulation data and is found to be accurate.