Abstract
A method for the exact computation of long-line fault transients is presented. The use of a numerical inverse Laplace transform algorithm makes it possible to analyze faults on lines of any length, while the derivation of the equations in the s-domain makes it possible to represent such lines by a single two-port network for each one. For convenience, the approach is first illustrated for a single-phase representation, which is valid for symmetrical faults. Then a generalized approach for three-phase modeling is derived to simulate any type of fault. The advantages of this approach are its accuracy and simplicity as well as its inherent capability for giving the values of the different currents and voltage at different network locations at preselected time points. It is believed that one of the major applications of this method will be the testing of different digital protection algorithms and strategies.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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