Abstract
Because the market regulation in Brazil, power transmission companies are paid for the availability of their
lines. When a fault occurs and the line becomes unavailable, such companies are penalized for the time
the line is off service. Thus, fault location systems that can reach higher accuracy to estimate the fault
location minimize the downtime of the line and, therefore, the application of penalties. Impedance-based
fault location methods usually are not efficient in high impedance events. Traveling wave-based fault location
technology provides good estimation independently of the type of the fault. This article shows the experience
of implementing a traveling waves-based fault location system in Eletronorle (Brazil) transmission lines,
which because of their geographical location and the climate of the region, have a large incidence of highimpedance
faults. After a large number of events, the results show the reliability of fault location by using
traveling waves, even if the wave fronts are shown with higher attenuation compared to those produced by
/ow-impedance faults.
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