Power plant maintenance scheduling using dependency structure matrix and evolutionary optimization

Magnus Thor Jonsson*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

With the growth of demand for electrical energy, it is a common practice in the power industry to shorten the maintenance duration and often to postpone maintenance tasks. Maintenance or overhaul of generating units is one of the crucial factors in delivering reliable electrical energy. A large part of the overhaul work is to examine the condition of the mechanical and the electrical elements. This examination can highlight faults in some components requiring management of new activities. This paper presents a method using a dependency structure matrix for managing schedules within uncertain conditions of information dependency. The matrix is optimized using an evolutionary algorithm for scheduling overhaul and planned outages at hydro power plants. The dependency between tasks or the information flow between activities is formulated in a structural matrix with the objective to minimize the total completion time. The method is used to examine the staff scheduling of a twelve years overhaul at one of Landsvirkjun's hydro power units. Staff scheduling or rostering is a large scale constrained optimization problem. Using the Dependency Structure Matrix (DSM) and evolutionary methods (GA) to optimize the order of activities shows improvements in the overhaul operational plan.

Original languageEnglish
Title of host publicationWCECS 2015 - World Congress on Engineering and Computer Science 2015
EditorsCraig Douglas, Jon Burgstone, Warren S. Grundfest, Jon Burgstone, Craig Douglas, S. I. Ao
PublisherNewswood Limited
Pages961-965
Number of pages5
ISBN (Electronic)9789881404725
Publication statusPublished - 2015
Event2015 World Congress on Engineering and Computer Science, WCECS 2015 - San Francisco, United States
Duration: 21 Oct 201523 Oct 2015

Publication series

NameLecture Notes in Engineering and Computer Science
Volume2220
ISSN (Print)2078-0958

Conference

Conference2015 World Congress on Engineering and Computer Science, WCECS 2015
Country/TerritoryUnited States
CitySan Francisco
Period21/10/1523/10/15

Other keywords

  • Dependency structure matrix
  • Maintenance
  • Optimization
  • Outage
  • Staff scheduling

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