绝缘包覆引流线温升模型及特性研究
Research on temperature rise model and characteristics of insulation-coated drainage line
杜迎春 1伍弘 2杨志宁 1马陆阳 1李凯 3毕茂强3
作者信息
- 1. 国网宁夏电力有限公司吴忠供电公司, 宁夏 吴忠 751100
- 2. 国网宁夏电力有限公司电力科学研究院, 宁夏 银川 750011
- 3. 重庆理工大学 电气与电子工程学院, 重庆 400054
- 折叠
摘要
为明确绝缘层对引流线温度场的影响,采用有限元数值计算的方法,建立电磁温度场耦合计算模型,仿真分析绝缘引流线绝缘层的厚度、热导率以及载流量对温度分布的影响.结果表明:随着绝缘层厚度增加,传热过程变长,绝缘层外界温度逐渐降低,而绝缘层内侧和导体线芯温度接近,均表现为先减小后增大;绝缘层材料的导热率是影响导体线芯温度变化的重要因素,但对绝缘层外侧影响较小.采用试制的绝缘引流线样品进行温升实验,验证了计算模型的有效性.研究结果可为绝缘引流线的设计提供参考.
Abstract
The ordinary drainage wire is insulated by silicone rubber material, which effectively improves its insulation performance.However, the heat dissipation condition of the original wire is changed.To clarify the influence of the insulation layer on the temperature field of the drainage line, the electromagnetic-temperature field coupling calculation model is built by using the finite element numerical calculation method.The influence of the thickness, thermal conductivity and current carrying capacity of the insulation layer on the temperature distribution of the drainage line is simulated and analyzed.Our results show as the thickness of the insulating layer increases, the heat transfer process becomes longer, and the temperature outside the insulating layer gradually decreases, while the temperature inside the insulating layer is close to that of the conductor core, both of which decrease first and then increase.The thermal conductivity of the insulating layer material is an important factor affecting the temperature change of the conductor core, but it has little effect on the outside of the insulating layer.Finally, the rising-temperature experiment is conducted by using the trial-produced insulation drainage line sample, and the simulation and experimental calculation results are compared and analyzed to verify the validity of the calculation model.Our research results may provide some references for the design of insulation drainage wire.
关键词
绝缘引流线/绝缘层/硅橡胶/有限元计算/温度分布Key words
insulation drainage line/insulation layer/silicone rubber/finite element calculation/temperature distribution引用本文复制引用
基金项目
宁夏自然科学基金项目(2023AAC03849)
出版年
2024
国家科技期刊平台
NSTL
万方数据