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Optimizing the Locations of Cables for Current Rating

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					Optimizing the Locations of Cables
        for Current Rating




       Presented by Wael Moutassem
  Supervisors: Reza Iravani, George Anders
Outline

    • What is current rating of a cable?

    • Cables in duct bank and casing

    • Algorithm: Vector-Immune-System (VIS)

    • Optimization results
Cable Current Rating
   • Current rating: maximum current carried by cable
     without overheating, caused by Joule and
     dielectric losses.
                             • Losses in conductor, sheath
                               and armour.
                             • Dissipation of heat outwards
                               through layers to surroundings
                             • Neighbouring cables affect
                               Joule losses and cause added
                               heat.
                             • Electro-thermal model
                               including all cables in an
                               installation
                             Equations for current ratings of
                               cables based on their
                               parameters and configuration
Cables in Duct Bank or Casing
Vector Immune System Algorithm
   • Use VIS algorithm to determine configurations for
     largest and smallest current ratings.
VIS Operations
   • Mutation: exchange




   • Mutation: inversion
Optimization Results- Duct bank
     Largest Total       Smallest Total
    5,703 Amperes        3,438 Amperes




            Difference = 2,265
                  Amperes
Optimization Results- Casing
     Largest Total       Smallest Total
    2,850 Amperes        2,766 Amperes




          Difference = 84 Amperes
Conclusion


   • Genetic algorithm used to determine best
     and worst case configurations.
   • Duct bank study shows the large
     difference in possible total current rating
   • Casing study shows effect on current
     rating of cables proximity to steel casing
      Thank You

      Questions?
wael.moutassem@utoronto.ca

				
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posted:3/23/2011
language:English
pages:10