Numerical algorithm for adaptive autoreclosure and protection of medium-voltage overhead lines

In this paper, a new numerical algorithm for medium-voltage overhead lines, autoreclosure, is described. The subfunction of the autoreclosure scheme that would inhibit the first shot after detecting a solid fault (as compared with an arc fault) is evaluated and presented. It is based on one terminal...

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Bibliographic Details
Published in:IEEE transactions on power delivery 2004-04, Vol.19 (2), p.554-559
Main Authors: Terzija, V.V., Radojevic, Z.M.
Format: Article
Language:English
Subjects:
Adaptive algorithm
Adaptive algorithms
Algorithms
Computer network reliability
Computer simulation
Data processing
Elongation
Estimation error
Fault detection
Faults
Gunshot detection systems
Mathematical models
Medium voltage
Numerical analysis
Protection
Solids
Studies
Supplying
Terminals
Testing
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Summary:In this paper, a new numerical algorithm for medium-voltage overhead lines, autoreclosure, is described. The subfunction of the autoreclosure scheme that would inhibit the first shot after detecting a solid fault (as compared with an arc fault) is evaluated and presented. It is based on one terminal data processing and it is derived in the time domain. In the algorithm the fault nature (arcing or arcless fault) is estimated using linear least error squares estimation technique. The arc, occurring on the fault point during arcing faults on overhead lines, is included in the problem consideration. In addition, by introducing the prefault load current in the existing model, better algorithm performances and a more reliable adaptive algorithm for autoreclosure are achieved. The algorithm is derived for the case of three-phase symmetrical fault. The results of the algorithm testing through computer simulation are presented. Particularly the algorithm sensitivity to arc elongation effects, supplying network parameters, and processing of the signals in the presence of harmonics are tested and analyzed.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2003.823184