Heavy-Tailed Transmission Line Restoration Times Observed in Utility Data

The empirical probability distribution of transmission line restoration times is obtained from 14 years of field data from a large utility. The distribution of restoration times has a heavy tail that indicates that long restoration times, although less frequent, routinely occur. The heavy tail diffe...

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Bibliographic Details
Published in:IEEE transactions on power systems 2018-01, Vol.33 (1), p.1145-1147
Main Authors: Kancherla, Sameera, Dobson, Ian
Format: Article
Language:English
Subjects:
Maintenance engineering
Power system reliability
Power transmission lines
Reliability
Resilience
restoration
Steady-state
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Summary:The empirical probability distribution of transmission line restoration times is obtained from 14 years of field data from a large utility. The distribution of restoration times has a heavy tail that indicates that long restoration times, although less frequent, routinely occur. The heavy tail differs from the convenient assumption of exponentially distributed restoration times, impacts power system resilience, and makes estimates of the mean restoration time highly variable.
ISSN:0885-8950
1558-0679
DOI:10.1109/TPWRS.2017.2707278