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A Novel Principle of Current Differential Protection for UHV and EHV Transmission Lines Based on Distributed Parameters Line Model
Authors: M. Arshad Shehzad Hassan, Guobing Song, Xiaoning Kang, Zaibin Jiao, Sohaib Tahir, Nouman Faiz
Number of views: 599
Distributed capacitive current of ultra high voltage
and extra high voltage (UHV&EHV) transmission lines has a
severe negative effect on current differential protection. The
current differential protection in this proposed paper is based
on distributed parameters line model of the transmission line
and has been used to solve the problem of distributive
capacitive current of transmission line. Time-domain algorithm
has been used to calculate currents at the set point of the line by
using both ends current. By adding linear interpolation with
low computational rate at each sampling points has been
achieved. The theoretical analysis of this method is broach to
demonstrate how the novel principle is of high sensitivity in
differentiating between the external and the internal faults of
the line. After theoretical analysis and applying the pristine
novel principle of current differential protection for UHV and
EHV transmission lines based on distributed parameters line
model, the simulation results illustrates that the analysis done
in this paper is quite appropriate as desired, correspondingly
this recently acquired principle is much reliable, compared to
the traditional principle.