Temperature and Electric Field Distribution Characteristics of a DC-GIL Basin-Type Spacer with 3D Modelling and Simulation

Xiaolong Li, Mingde Wan, Shouyi Yan and Xin Lin
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Xiaolong Li: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Mingde Wan: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Shouyi Yan: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Xin Lin: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China

Energies, 2021, vol. 14, issue 23, 1-16

Abstract: The temperature properties of real-type direct-current gas-insulated transmission lines (DC-GIL) with a basin-type spacer were investigated by the finite element method in this paper. A horizontally installed model was established and the temperature distribution was obtained with a 3D model. The specific heat capacity and thermal conductivity of the spacer were measured and applied in the simulation. The results show that the temperature of the convex surface was slightly higher than that of the concave surface. With an increase in the SF 6 pressure, the temperature of the spacer decreased, which can be attributed to the improvement of convection due to increases in the heat capacity per unit volume. With an increase in the ambient temperature, the temperature of the spacer increased linearly. The temperature difference between the inner and outer parts of the spacer increased with increases in the load current. Besides, an obvious increase in the surface electric field strength appeared under the influence of the thermal gradient compared to the results without the thermal gradient. Thus, special attention should be paid to the insulation properties of the spacer considering the influence of temperature distribution. This study evaluates both the thermal and insulation characteristics of the GIL along with the spacer under various conditions.

Keywords: temperature distribution; electric field distribution; gas-insulated transmission lines; spacer; high voltage direct current (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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