Average Service Availability Index
From HandWiki
The Average Service Availability Index (ASAI)[1][2] is a reliability index commonly used by electric power utilities. ASAI is calculated as
[math]\displaystyle{ \mbox{ASAI} = \frac{\sum{N_i} \times 8760 - \sum{U_i N_i}}{\sum{N_i} \times 8760} }[/math]
where [math]\displaystyle{ N_i }[/math] is the number of customers and [math]\displaystyle{ U_i }[/math] is the annual outage time (in hours) for location [math]\displaystyle{ i }[/math]. ASAI can be represented in relation to SAIDI (when the annual SAIDI is given in hours)
[math]\displaystyle{ \mbox{ASAI} = 1 - \frac{\mbox{SAIDI} }{8760} }[/math]
See also
References
- ↑ Yeddanapudi, Sree. "Distribution System Reliability Evaluation". Iowa State University. Archived from the original on 26 December 2011. https://web.archive.org/web/20111226034249/http://www.ee.iastate.edu/~jdm/ee653/DistributionReliabilityPredictive.ppt. Retrieved 18 June 2011.
- ↑ Pham, Hoang (8 April 2003). Handbook of reliability engineering. Birkhäuser. pp. 514. ISBN 978-1-85233-453-6. https://books.google.com/books?id=Xe6Z4wKQFMoC&pg=PA514. Retrieved 21 July 2011.
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