Unsteady heat transfer of long gas insulated transmission lines in tunnel: Model and analysis

被引：0
|
作者：
Li, Guo [1 ]
Zeng, Wenhui [1 ]
Fan, Jiayuan [1 ]
Yi, Luo [1 ]
Xu, Wenjie [1 ]
机构：
[1] State Grid Sichuan Elect Power Co, Econ & Technol Res Inst, Chengdu 610056, Peoples R China
来源：
HELIYON | 2024年 / 10卷 / 13期
关键词：
Gas insulated transmission line; Tunnel; Unsteady heat transfer; Flow;
D O I：
10.1016/j.heliyon.2024.e33513
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The temperature of the cable core and cable casing is crucial for the safety and efficiency of the transmission system. Accurately predicting the distribution and variation of the transmission temperature field in the gas insulated transmission lines (GIL) tunnel is essential to ensure the long GIL tunnel transmission system's safe and stable operation. This paper addresses the challenge of calculating unsteady heat transfer flow in extra-long GIL transmission tunnels. The paper proposes a model, and a rapid solution method for extra-long GIL transmission heat transfer flow. In addition, the temperature variation during the operation of 1000 kV GIL has been analyzed. The results indicated that the conductor and cable casing temperature gradually increases and tends to be relatively stable with the operation time. The research results can provide theoretical basis and data support for the regulation of GIL tunnel transmission operation.
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页数：16
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