Finite Element Analysis for the Influence of Clamp on the Thermal Characteristics of High Voltage Insulated Power Cable
Lü Anqiang1,2, Li Jing3, Zhang Zhenpeng4, Song He1, Lin Xiaobo5
1. Department of Electronic and Communication Engineering North China Electric Power University Baoding 071003 China;
2. Hebei Key Laboratory of Power Internet of Things Technology North China Electric Power University Baoding 071003 China;
3. Department of Computer North China Electric Power University Baoding 071003 China;
4. China Electric Power Research Institute Wuhan 430074 China;
5. State Grid Zhoushan Electric Power Supply Company of Zhejiang Power Corporation Zhoushan 316021 China
The clamp is an essential component of the installed high-voltage insulated cable. In order to obtain the influence of clamp on the thermal characteristics of the cable, the electrothermic coupling finite element analysis is carried out on a typical 220kV AC single core XLPE insulated cable. According to the actual situation of cable laying in a certain city in China, the two dimensional and three dimensional electrothermal coupling finite element models of the cable under five different material clamps are established. The ampacity ratings and thermal time constants of the cable under different clamps are obtained through steady-state and transient thermodynamic calculation. The distribution law of conductor temperature in radial and axial directions is obtained by calculating the cable temperature under different clamp materials and intervals, and the relation function of the clamp material and interval with the cable conductor temperature is obtained. The results show that the material and interval of the clamps have an effect on the cable's ampacity ratings and thermal time constant. There is a critical value for the thermal conductivity and interval of the clamp, and the conductor temperature on both sides of this value varies greatly. This paper can provide theoretical and data support for cable construction and operation.
吕安强, 李静, 张振鹏, 宋贺, 林晓波. 夹具对高压绝缘电缆热学特性影响的有限元分析[J]. 电工技术学报, 2022, 37(1): 283-290.
Lü Anqiang, Li Jing, Zhang Zhenpeng, Song He, Lin Xiaobo. Finite Element Analysis for the Influence of Clamp on the Thermal Characteristics of High Voltage Insulated Power Cable. Transactions of China Electrotechnical Society, 2022, 37(1): 283-290.
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2022, Vol. 37 
