Managing cable thermal stress through predictive ratings

Author

Huang, R. ; Pilgrim, J.A. ; Lewin, P.L. ; Scott, D. ; Morrice, D.

Author_Institution

Sch. of Electron. & Comput. Sci., Univ. of Southampton, Southampton, UK

fYear

2015

fDate

7-10 June 2015

Firstpage

110

Lastpage

113

Abstract

The majority of high voltage cables are sized and operated by a continuous current rating which is based on the worst-case assumptions. However, the load on the cables themselves may vary significantly depending upon the time and season. In this paper, a dynamic thermal model for a cable in air installation is built using the finite difference method. The real-time load current and ambient conditions are accessible to allow improved cable modelling. This model is then used to support the rating calculations, the accuracy of which is compared with results obtained from laboratory experiments. A prediction system has been developed to predict the rating from any point forward within the next 24 hours.

Keywords

finite difference methods; power cables; thermal stresses; air installation; continuous current rating; dynamic thermal model; finite difference method; high voltage cable thermal stress management; predictive rating; Cable insulation; Cable shielding; Communication cables; Conductors; Copper; Integrated circuit modeling; Predictive models; Cable; dynamic thermal rating; finite difference method; thermal analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation Conference (EIC), 2015 IEEE

Conference_Location

Seattle, WA

Print_ISBN

978-1-4799-7352-1

Type

conf

DOI

10.1109/ICACACT.2014.7223601

Filename

7223601