文章摘要
110 kV插拔式GIS电缆终端轴向传热分析
Assessment on axial heat transfer of 110kV plug-in GIS cable terminal
投稿时间:2020-01-22  修订日期:2020-02-21
DOI:
中文关键词: GIS电缆终端  载流量  热路  高压电缆  轴向传热
英文关键词: GIS cable terminal  ampacity  thermal circuit  cable  axial heat conduction
基金项目:国家高技术研究发展计划项目(2015AA050201)。
作者单位E-mail
许鹏飞 华南理工大学电力学院 214824181@qq.com 
杨帆 广州供电局电力试验研究院 327900050@qq.com 
刘刚 华南理工大学电力学院  
朱宁西 华南理工大学电力学院  
王振华 广州供电局白云供电局  
张敏 广州供电局电力试验研究院  
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中文摘要:
      GIS电缆终端的轴向传热特性对电缆资产的可靠性与利用率均有重要意义。本文通过建立GIS电缆终端等效热路模型,理论分析其传热特性与载流热点,通过搭建了110kV GIS电缆终端大电流实验平台,激励800A至1200A稳态负荷电流,量化分析其轴向传热特性与影响范围。结果显示,GIS电缆终端轴向传热程度与载荷大小正相关,当载荷为1200A时,至高点温度为93.0℃,最大轴向温差可达15.4℃,已超过电缆线路的额定载流量。分析表明,GIS电缆终端轴向传热明显,其影响范围为尾管后1m左右距离,顶推弹簧截面处的导体为温度至高点,环境温度对GIS电缆终端与电缆本体影响权重等同并呈线性规律,本文研究结果可供电力调度及运行维护部门评估电缆线路载流量提供参考。
英文摘要:
      Axial heat-transfer characteristics of GIS cable terminals are important to the reliability and utilization of cable assets. In this paper, the equivalent thermal circuit model is established, and its axial and radial heat-transfer characteristics are analyzed. A 110kV GIS cable terminal high-current experimental platform is built, and a steady-state temperature rise experiment of 800A to 1200A is performed to further analyze its characteristics.The results showed that the axial heat transfer degree of GIS cable terminal was positively correlated with the load size. When the load was 1200A, the temperature to the high point was 93.0℃, and the maximum axial temperature difference was 15.4℃, exceeding the rated load capacity of the cable line.The analysis shows that the axial heat transfer of the GIS cable terminal is obvious, and the influence range is about 1m behind the liner, and the conductor at the push spring section is the temperature to the high point. The influence weight of the ambient temperature on the GIS cable terminal and the cable body is the same and shows a linear rule. The research results in this paper can be used as a reference for power dispatching and operation and maintenance departments to evaluate the ampacity of cable lines.
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