In recent decades, the real-time fault location became an issue of great interest for electric utilities, since it contributes to a very fast post-fault power supply restoration, with no need to analyze oscillographic records. However, most of existing fault location algorithms are applied off-line to take advantages of more sophisticated procedures for error reducing. Here, four digital fault location methods typically applied offline that are based on fundamental phasor values obtained through Phasor Measurement Units (PMU) were implemented in the Real Time Digital Simulator (RTDS) and compared among themselves. For this end, real-time digital simulations of faults on a 230 kV transmission line 300 km long were carried out and classical sources of errors such as inaccuracies in transmission line parameters, fault characteristics and the use of series compensation were addressed.
F.V. Lopes, Y.M.P. Melo, D. Fernandes Jr., W.L.A. Neves, Presented at the International Conference on Power Systems Transients (IPST2013) in Vancouver, Canada July 18-20, 2013. Paper #: 13IPST124
KEYWORDS: Fault location, phasor measurement units, PMU based methods, real-time, RTDS, transmission lines.