Abstract
A new approach for location of electrical faults along power transmission lines has been proposed in this paper. In the new approach, the electrical current signals of a fault at various locations along a transmission line are introduced into two fiber optical cables that could exhibit two different propagation speeds, and the fault location is found by using the time differences of arrival of the output signals from the two optical cables. To evaluate this approach, two types of experiments, one with square pulse generators for relaying the signals before being introduced into the optical cables and the other without any relay, have been carried out and the results show the location can be found with an error less than 10 m for a simulated power transmission line.
