Contact Temperature Prediction in Three-Phase Gas-Insulated Bus Bars With the Finite-Element Method

Author

Xiao Wen Wu ; Nai Qiu Shu ; Hong Tao Li ; Ling Li

Author_Institution

Sch. of Electr. Eng., Wuhan Univ., Wuhan, China

Volume

50

Issue

2

fYear

2014

fDate

Feb. 2014

Firstpage

277

Lastpage

280

Abstract

Degradation of the electric contact in gas-insulated bus bars (GIBs) is closely related to the overheating phenomenon occurring at the contacts. This paper employs the finite-element method to solve the 3-D coupled eddy current, fluid, and thermal problems in a three-phase GIB. In the model, the contact resistance is measured and described as a resistor between the conductor and the contact. Computational fluid dynamics is used to predict the temperature rise of the components in the GIB. The temperature-dependent thermal properties of SF6 gas and air are considered in the thermal analysis. The developed methodology is implemented on a 126 kV three-phase GIB prototype and validated with the experimental temperature rise results.

Keywords

SF₆ insulation; busbars; computational fluid dynamics; contact resistance; eddy currents; electrical contacts; finite element analysis; gas insulated switchgear; 3D coupled eddy current; SF₆; computational fluid dynamics; contact resistance; contact temperature prediction; electric contact; finite element method; overheating phenomenon; temperature-dependent thermal properties; thermal analysis; thermal problems; three-phase GIB prototype; three-phase gas-insulated bus bars; voltage 126 kV; Conductors; Contact resistance; Heat transfer; Heating; Temperature distribution; Temperature measurement; Computational fluid dynamics; condition monitoring; contact resistance; finite-element method;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2013.2282033

Filename

6749137