Modeling and analysis of the failure process for cost effective maintenance scheduling of MV XLPE cables

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Abstract

This study focuses on investigating the reliability of Medium Voltage (MV) cables. The current maintenance strategies conducted on MV cable assets are not effective. We attempt to use the reliability theory and its applications on cable asset failure and replacement process. 15 years historical cable asset failure data is explored and a significant number of events are observed. Reliability Centred Maintenance (RCM) approach is used to identify the critical failure modes and their criticality as well as the weighting patterns are assessed using the concept of Risk Priority Number (RPN). Statistical analysis of the failure data and maintenance allow us to test and assess the data for independence. We further propose a maintenance optimisation model that take into account preventive replacement of the cable assets. A simulation framework of the model is presented and used to determine optimum cost effective preventive maintenance strategy and adequate PM strategy recommended is illustrated on a graph.
Original languageEnglish
Publication statusPublished - 3 Jul 2013

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Keywords

  • medium voltage cables
  • RPN
  • reliability theory
  • statistical analysis

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