Replacement of PILC/PICAS joints using dynamic programming for optimization and Weibull model for reliability assessment

Ian Hancock, Chengke Zhou, Huajie Yi, Dong Chen, Andrew McDiarmid, Ralph Eyre-Walker

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

In response to a recent rise in the number of PILC/PICAS joint failures at a utility, the company has set targets to replace a significant number of ageing joints over the next 4 years. This paper aims to provide a methodology for replacement optimization using Dynamic Programming (DP). As part of the methodology, an objective function and constraints is proposed where the goal is to determine the optimal number of yearly replacements which minimizes total cost whilst maintaining an acceptable level of risk. DP is used to find the replacement combination which returns the minimum cost whilst satisfying the constraints. A case study is conducted to investigate the impact cost of replacement, cost of failure and total acceptable replacement limit has on the optimization results. The optimal replacement strategy was obtained. By comparing the optimal replacement strategy against an average unoptimized replacement strategy, it was found that utilities can expect a 14% cost saving and a 40% reduction in the total number of predicted failures by using the replacement optimization methodology detailed in this paper.

Original languageEnglish
Title of host publication2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)
PublisherIEEE
Pages97-100
Number of pages4
ISBN (Electronic)9781665419079
DOIs
Publication statusPublished - 14 Feb 2022
Event96th IEEE Conference on Electrical Insulation and Dielectric Phenomena - Vancouver, Canada
Duration: 12 Dec 202115 Dec 2021

Publication series

NameAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
Volume2021-December
ISSN (Print)0084-9162
Name
ISSN (Electronic)2576-2397

Conference

Conference96th IEEE Conference on Electrical Insulation and Dielectric Phenomena
Abbreviated titleCEIDP 2021
Country/TerritoryCanada
CityVancouver
Period12/12/2115/12/21

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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