Zm. Radojevic et al., NUMERICAL ALGORITHM FOR BLOCKING AUTORECLOSURE DURING PERMANENT FAULTS ON OVERHEAD LINES, Electric power systems research, 46(1), 1998, pp. 51-58
This paper presents a new numerical algorithm for blocking autoreclosu
re during permanent faults on overhead lines. It is based on one termi
nal input data processing and it is derived in time domain. The fault
nature (arcing or arcless fault) is determined from the are voltage am
plitude estimated using the least squares error technique. The faulted
phase voltage is modeled as a serial connection of fault resistance a
nd are voltage. The new approach does not require the line zero sequen
ce parameters as input data and the algorithm is derived for the case
of the most frequent single-phase to ground unsymmetrical fault. The r
esults of algorithm testing through computer simulation and under labo
ratory conditions are given. The influence of remote infeed, fault res
istance, network topology and other factors are investigated and syste
matically presented. (C) 1998 Elsevier Science S.A. All rights reserve
d.