B. Lian et al., IDENTIFYING AN ERROR SOURCE IN THE DIFFERENTIAL-EQUATION APPROACH FORTHE TRANSMISSION-LINE FAULT LOCATION ALGORITHM, Electric power systems research, 42(2), 1997, pp. 115-119
An overlooked error source in the differential equation approach for l
ocating a fault on a transmission line is investigated. Due to the use
of difference equations in the expansion of the differential equation
, a mismatch results between the different transfer functions in the f
requency domain that are applied to different terms in the same equati
on, causing an error in the final fault location estimate. This error
source is identified and its effect on the fault location estimate is
shown through numerical simulation. A criterion is proposed for improv
ing the difference approximation. (C) 1997 Elsevier Science S.A.