Optimizing the Locations of Cables for Current Rating Presented by Wael Moutassem Supervisors: Reza...
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Transcript of Optimizing the Locations of Cables for Current Rating Presented by Wael Moutassem Supervisors: Reza...
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
5,703 AmperesSmallest Total
3,438 Amperes
Difference = 2,265 Amperes
Optimization Results- Casing
Largest Total
2,850 AmperesSmallest Total
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