A method to include component condition and substation reliability into distribution system reconfiguration

Ilias Sarantakos*, David M. Greenwood, Jialiang Yi, Simon R. Blake, Phil C. Taylor

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

5 Citations (Scopus)


Component condition and substation (S/S) reliability have a material impact on the cost of customer interruptions in electricity distribution systems (DSs). However, these factors are not usually considered within distribution system reconfiguration (DSR) problem formulations, because of the lack of a readily available methodology. This paper presents such a method, making use of component condition scores which are now mandatory for distribution system operators (DSOs) in the UK. Based on these condition scores, condition-based failure rate can be calculated for each component. S/S reliability is a function of component condition, S/S configuration and the network upstream of the S/Ss. The reliability of the S/S then has an impact on the reliability indices of each load point (LP) it supplies. These factors are combined to deliver a better informed algorithm for DSR, which is verified through its application on two DSs. The annual savings, compared to the formulation that neglects component condition and S/S reliability, can be in the order of tens of thousands of U.S. dollars for a single DS.

Original languageEnglish
Pages (from-to)122-138
Number of pages17
JournalInternational Journal of Electrical Power and Energy Systems
Publication statusPublished - Jul 2019

Bibliographical note

Funding Information:
This work was supported by the Engineering and Physical Sciences Research Council (EPSRC), UK (award reference 1645763) and Siemens plc, UK (reference 14220176). The authors would like to thank four anonymous reviewers for their valuable comments, as well as Dr Graeme Coapes from Siemens plc, Hebburn for his helpful feedback. Data supporting this publication is openly available under an 'Open Data Commons Open Database License'. Additional metadata are available at: http://dx.doi.org/10.17634/154300-106 .

Publisher Copyright:
© 2019 The Authors

Copyright 2019 Elsevier B.V., All rights reserved.


  • Component condition
  • Condition-based failure rate
  • Reconfiguration
  • Reliability
  • Substation

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