NDLI: Implementation of statistical principles to reflect the long term performance of composite insulators

Content Provider	IEEE Xplore Digital Library
Author	Tzimas, A. Rowland, S.M.
Copyright Year	2011
Description	Author affiliation: School of Electrical and Electronic Engineering, The University of Manchester, Manchester, M13 9PL, UK (Tzimas, A.; Rowland, S.M.)
Abstract	There are numerous advantages of polymeric composite insulators over the traditional ceramic ones. However composite insulators, being comprised of organic elements, age more rapidly over time. Environmental conditions control both the manner in which composite insulators age, and the effective stresses that insulator strings are exposed to in service. The current work presents a statistical methodology to reflect the reliability of a network consisting of composite insulators. This accounts for the working environment and its impact on both the ageing of the insulator and risk of flashover. This is achieved by combining previously established statistical dimensioning principles according to the site's pollution severity and a four-state Markov ageing model. The risk of flashover is estimated according to the site's pollution severity using statistical principles. Then by choosing appropriate transition probabilities between the states of Markov's ageing process the population of insulators at risk of flashover because of ageing is estimated. The combination of the risk of flashover due to the pollution severity and due to ageing of the insulators results in an estimation of risk of flashover for a given number of insulators in a given point in time. The resulting forecast of flashover performance could be used to assist asset management decisions as well as optimising condition monitoring of composite insulators.
Starting Page	97
Ending Page	101
File Size	513183
Page Count	5
File Format	PDF
ISBN	9781457702785
e-ISBN	9781457702792
e-ISBN	9781457702778
DOI	10.1109/EIC.2011.5996124
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-05
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Insulators Aging Flashover Markov processes Pollution Sea measurements Mathematical model condition monitoring outdoor insulators Markov risk of flashover statistical methodology asset management
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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