| 户内气体绝缘输电线路温升数值计算模型的研究 |
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| 引用本文： | 张改杰,;夏雨潇,;张伦,;梁京辉.户内气体绝缘输电线路温升数值计算模型的研究[J].陕西电力,2014(3):45-48. |
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| 作者姓名： | 张改杰 ;夏雨潇 ;张伦 ;梁京辉 |
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| 作者单位： | [1]国网孝感供电公司,湖北孝感432100; [2]海军工程大学电气工程学院,湖北武汉430033 |
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| 基金项目： | 国家自然科学基金资助项目（5127717）; 中央高校基本科研业务费专项资金资助（2012207020208） |
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| 摘 要： | 气体绝缘输电线路(GIL)载流量与温升密切相关,因此准确的温升计算对于GIL产品设计具有重要意义。建立了电磁场分析模型,计算出户内GIL导体与外壳功率损耗,并以该损耗作为热分析的体积热源。基于计算流体力学原理,将空气层引入求解区域,建立了GIL流体-温度场耦合有限元分析模型,并给出了基本假设与边界条件。利用该模型分别分析了不同负荷电流条件下的GIL稳态温升值以及阶跃负荷条件下的瞬态温度变化过程。温升计算结果与实测数据的对比证明了本文模型的有效性,所提出的方法为GIL热分析提供了参考。
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| 关 键 词： | 气体绝缘输电线路 有限元 温升 计算流体力学 |
Numerical Model Research of Temperature Rise Characteristics of Indoor Gas-insulated Transmission Lines |
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| Affiliation: | ZHANG GaiJie, XIA Yuxiao, ZHANG Lun, LIANG Jinghui (1.Xiaogan Power Supply Bureall, Xiaogan 432100, China; 2. Naval University of Engineering, Wuhan 430033, China) |
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| Abstract: | The current carrying capacity is relative with the temperature rise in gas-Insulated transmission lines（GIL）,thus temperature rise calculation is important in the design process of GIL.The electromagnetic analysis model is established to calculate power losses in the conductor and enclosure,which are used as heat source in the thermal analysis of indoor GIL.By introducing the ambient air into the solution region,finite element model coupling fluid and thermal fields is established based on computational fluid dynamics（CFD）,in which the basic assumptions and boundary conditions are given.The model is used to analyze,respectively,the steady-state temperature rises of GIL under different load currents and transient temperature rise process under step load current.The proposed model is validated with the comparison between the calculated and tested results.It will provide reference for the thermal analysis of GIL. |
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| Keywords: | gas-insulated transmission lines（GIL） finite element temperature rise computational fluid dynamics（CFD） |
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