Thermal analysis of cables in tunnel using SUPG finite element method

Author

Liang, Yongchun

Author_Institution

Hebei Univ. of Sci. & Technol., Shijiazhuang, China

fYear

2011

fDate

9-13 Oct. 2011

Firstpage

1

Lastpage

5

Abstract

In this paper thermal analysis and ampacity evaluation of underground power cables that are placed in Tunnel are presented. A Streamline-upwind/Petrov-Galerkin (SUPG) stabilized finite element method is proposed to solve the air governing formulations in the region between the cables and the retaining tunnel in the underground power transmission system. In thermal analysis, a nonlinear-coupled electromagnetic-thermal model of underground cables and the radiation heat exchanges between external cables surface and internal tunnel surface is proposed. The analysis reveals that the convection induced heat exchange is much stronger than the conduction induced heat exchange in the air between external cables surface and internal tunnel surface. At last, Newton-Rahpson iteration method is used to evaluate the cable ampacity.

Keywords

Galerkin method; Newton-Raphson method; convection; finite element analysis; heat conduction; heat radiation; power cables; thermal analysis; tunnels; underground cables; underground transmission systems; Newton-Rahpson iteration method; SUPG finite element method; ampacity evaluation; cable surface; cable thermal analysis; conduction-induced heat exchange; convection-induced heat exchange; nonlinear-coupled electromagnetic thermal model; radiation heat; streamline-upwind-Petrov-Galerkin stabilized FEM; tunnel surface; underground power cables; underground power transmission system; Soil; Thermal conductivity; Cable Ampacity; Coupled Analysis; Finite Element Method; SUPG Stabilized Formulation; Thermal Field; Tunnel;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting (IAS), 2011 IEEE

Conference_Location

Orlando, FL

ISSN

0197-2618

Print_ISBN

978-1-4244-9498-9

Type

conf

DOI

10.1109/IAS.2011.6074407

Filename

6074407