Adaptive SPAR offers many advantages over
conventional techniques. In the case of transient faults, the
arcing extinction time can be accurately determined and in the
case of a permanent fault, breaker reclosure can be avoided.
This paper describes, in some detail, the design of a new
Adaptive SPAR technique that extracts high frequencies
transients, from the CVT. The main case of study in this paper is
the High Dam / Nagh Hamady, Nagh Hamady /Assuit 500 kV
double circuit transmission system in the Egyptian network.
Fault scenario cases representing different fault locations,
inception angles, actual representation to secondary arc
characteristics, and with/without shunt reactor existence were
extracted from simulation work, and then verified through real
field records in that system. The outcome of this study indicates
that the proposed technique can be used as an effective means of
achieving an adaptive single pole auto reclosure |
