This paper presents the implementation of a fast adaptive single-phase reclosing scheme based on the
measurement of voltage harmonic content. The main objective of this scheme is to ensure the application of single-phase reclosing after the transient fault extinction or perform automatic blocking maneuver and three-phase tripping for permanent faults. The transmission system represented was based on an actual 500 kV Brazilian system and the tests were made with Real-Time Digital Simulator (RTDS). The protection scheme was implemented with a commercial relay and a measurement equipment, as well as in RTDS hardware. The proposed adaptive protection reduced typical dead-time and ensured successful reclosing only after arc extinction, enhancing system reliability.
O.F. Dians, M.C. Tavares, In Proc. International Conference on Power Systems Transients (IPST2015), Cavtat, Croatia, June 2015
KEYWORDS: Single-phase fault, Adaptive reclosing, Harmonic content, Real-time digital simulator (RTDS)