In the present paper the main results on Half-Wavelength Transmission Line (HWL) protection scheme for three-phase faults are presented. The analyzed system consisted of an experimental trunk of 2600 km formed with actual 500 kV lines existent in Brazilian electrical power system. This AC transmission alternative is a point-to-point transmission that does not need neither shunt nor series compensation, resulting in a lower implementation cost when compared to HVDC solution, with the additional advantage of not being based on Power Electronic technology. The HWL protection scheme for threephase faults was implemented in RTDS real time simulator with the relay that will be used with the experimental trunk. It was possible to properly protect the 2600 km long line with conventional relay, only using the functions available in the equipment.
R.G. Fabián E., M. C. Tavares, Presented at the International Conference on Power Systems Transients (IPST2013) in Vancouver, Canada July 18-20, 2013. Paper #: 13IPST107
KEYWORDS: Half-wavelength transmission, Line energization, RTDS simulation, Protection, Three-phase faults, Reduced Insulation Distance (RID).