Prioritizing the Restoration of Network Transformers Using Distribution System Loading and Reliability Indices

Roupchan Hardowar, Sergio Rodriguez, Resk Ebrahem Uosef, Francisco De Leon, Dariusz Czarkowski

Research output: Contribution to journalArticle

Abstract

A method is proposed to prioritize the repair or replacement of out-of-service transformers that feed a heavily meshed secondary grid. Priority assigned to the restoration of a specific transformer is based on the risk reduction that results from this replacement. Risk is defined as the reduction in the probable number of customers out of service should the transformer return to service. This measure of risk addresses the possibility of network collapse following feeder failures (occasioned by load-induced failure of transformers or feeders) and local customer impact on the secondary network. The prediction of risk makes extensive use of load predictions for feeder sections, network transformers, and secondary mains. A software tool has been developed to implement the equations proposed in this paper. This software gives system planners and operators the ability to quickly and economically select the next transformer to be repaired or replaced.

Original languageEnglish (US)
Pages (from-to)1236-1243
Number of pages8
JournalIEEE Transactions on Power Delivery
Volume32
Issue number3
DOIs
StatePublished - Jun 2017

Keywords

  • Distribution system contingency analysis
  • line out distribution factor
  • network reliability
  • risk assessment

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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