This paper presents a proposal for single-phase fault protection of Half Wavelength (HWL) transmission lines using conventional relays. The behavior of the voltages and currents caused by single-phase faults does not allow the use of the conventional philosophy to identify and locate faults. The study was performed for an energization test of an isolated HWL transmission line. This work describes the digital relay functions necessary to properly trip the line. The simulations were performed with RTDS real-time simulator.
E.C. Gomes, M.C. Tavares, C.A. Floriano, Presented at the International Conference on Power Systems Transients (IPST2013) in Vancouver, Canada July 18-20, 2013. Paper #: 13IPST085
KEYWORDS: Protection, half wavelength transmission, AC-Link, RTDS, digital relays, single line faults.