DocumentCode :
2041216
Title :
Assessment of spare transformer requirements for high voltage load stations
Author :
Hamoud, G.A.
Author_Institution :
Hydro One Inc., Toronto, ON, Canada
fYear :
2012
fDate :
22-26 July 2012
Firstpage :
1
Lastpage :
8
Abstract :
This paper describes a probabilistic method based on a Markov model for assessing the number of spare transformers required for a group of similar transformers used in high voltage load stations. The proposed method accounts for a number of factors that affect the number of spare units. The factors include the group size, unit failure rate, unit repair time, installation time of a spare unit and the failure criterion defined for each load station. The method uses two criteria in determining the required number of spare units. The 1st criterion assumes that a predetermined level of the group availability is given and the number of spare units is determined when the calculated group availability exceeds the pre-determined level of the group availability. The 2nd criterion uses a cost/benefit analysis method in calculating the number of the spare units. In the 2nd criterion, the number of spare units (optimal number) is determined when the total cost (spare unit capital cost and unit outage cost) is minimum. A sample of Hydro One power transformers is used to illustrate the proposed method of assessment.
Keywords :
Markov processes; cost-benefit analysis; costing; fault diagnosis; maintenance engineering; power transformers; Hydro One power transformers; Markov model; cost-benefit analysis method; failure criterion; group availability; group size; high-voltage load stations; probabilistic method; spare transformer requirements; spare unit capital cost; spare unit installation time; unit failure rate; unit outage cost; unit repair time; Availability; Circuit faults; Equations; Maintenance engineering; Markov processes; Mathematical model; Power transformers; Cost/ benefit analysis; Deployment time for spare transformer; High voltage load station; Markov model; Sensitivity analysis; Spare transformer; System availability; Transformer failure rate;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power and Energy Society General Meeting, 2012 IEEE
Conference_Location :
San Diego, CA
ISSN :
1944-9925
Print_ISBN :
978-1-4673-2727-5
Electronic_ISBN :
1944-9925
Type :
conf
DOI :
10.1109/PESGM.2012.6344650
Filename :
6344650
Link To Document :
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