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Estimation of Indiv...
Estimation of Individual Failure Rates for Power System Components based on Risk Functions
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- Jürgensen, Jan Henning, 1987- (författare)
- KTH,Elektroteknisk teori och konstruktion,Reliability Centred Asset Management (RCAM) Group
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- Nordström, Lars (författare)
- KTH,Elkraftteknik,Power system operation and control
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- Hilber, Patrik (författare)
- KTH,Elektroteknisk teori och konstruktion,Reliability Centred Asset Management (RCAM) Group
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(creator_code:org_t)
- 2018
- Engelska.
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- The failure rate is essential in power system reliability assessment and thus far it has been commonly assumed as constant. This is a basic approach that delivers reasonable results. However, this approach neglects the heterogeneity in component populations which has a negative impact on the accuracy of the failure rate. This paper proposes a method based on risk functions, which describes the risk behaviour of condition measurements over time, to compute individual failure rates within populations. The method is applied to a population of 12 power transformers on transmission level. The computed individual failure rates depict the impact of maintenance and that power transformers with long operation times have a higher failure rate. Moreover, the paper presents a procedure based on the proposed approach to forecast failure rates. Finally, the individual failure rates are calculated over a specified prediction horizon and depicted with a 95\% confidence interval.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Nyckelord
- Asset management
- condition monitoring
- failure rate
- failure rate modeling
- power transformer diagnostics
- Electrical Engineering
- Elektro- och systemteknik
Publikations- och innehållstyp
- vet (ämneskategori)
- ovr (ämneskategori)