基于混合气体热特性的GIL氮气使用配比研究 |
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作者姓名: | 庞乐乐 杨文勇 李鹏飞 郭晓飞 高鹏 梁睿 |
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作者单位: | 国网冀北电力有限公司张家口供电公司,国网冀北电力有限公司张家口供电公司,国网冀北电力有限公司张家口供电公司,国网冀北电力有限公司张家口供电公司,中国矿业大学,中国矿业大学,中国矿业大学 |
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基金项目: | 江苏省自然科学基金面上项目(BK20201348),基于边缘计算的GIS温度反演及过热故障诊断(830107200003) |
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摘 要: | SF6/N2混合气体具有绝缘性能良好、环境效益好等优点,被认为是能替代SF6的最具发展前景的气体之一,但SF6/N2混合气体在不同场景下的混合比问题尚缺乏研究。文中在保证气体绝缘输电线路(GIL)绝缘水平的前提下,建立多物理场耦合计算模型,从混合气体热特性的角度出发,分析不同绝缘气体压强、负载电流和环境温度下SF6/N2混合比与GIL温升之间的关系,为GIL在不同场景下选择合适的SF6/N2混合比提供依据。结果表明:绝缘气体压强和相同压强下SF6含量均与GIL温升呈负相关关系;设备的负载电流长期超过3 kA时,建议SF6含量为40%~60%;设备运行在中低纬度地区时,建议SF6含量为40%~70%,运行在高纬度地区时,建议SF6含量为30%~40%。此外,由于设计GIL设备时考虑了安全裕度,因此通常SF<...
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关 键 词: | 气体绝缘输电线路(GIL) SF6/N2混合气体 气体组分 气体绝缘 有限元法 热特性分析 |
收稿时间: | 2021/3/22 0:00:00 |
修稿时间: | 2021/5/21 0:00:00 |
N2 proportion in GIL based on heat characteristics of gas mixture |
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Authors: | PANG Lele YANG Wenyong LI Pengfei GUO Xiaofei GAO Peng LIANG Rui |
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Affiliation: | State Grid Jibei Electric Power Co,Ltd Zhangjiakou Power Supply Company,State Grid Jibei Electric Power Co,Ltd Zhangjiakou Power Supply Company,State Grid Jibei Electric Power Co,Ltd Zhangjiakou Power Supply Company,State Grid Jibei Electric Power Co,Ltd Zhangjiakou Power Supply Company,China University of Mining and Technology,China University of Mining and Technology, |
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Abstract: | SF6 has problems such as high global warming potential and high price, so SF6/N2 with good insulation performance and environmental friendliness is considered to be the most promising SF6 replacement gas at present. Under the premise of ensuring the insulation level of gas-insulated transmission lines, researching the thermal characteristics of SF6/N2 mixed gas and determining the mixing ratio of SF6/N2 under different conditions is of great significance for reducing the amount of SF6 used and reducing the environmental impact of power equipment. In this paper, a 3D GIL model for coupled electromagnetic-fluid-temperature fields is developed using finite element analysis. By varying the SF6/N2 mixing ratio, insulating gas pressure, load current and ambient temperature, the thermal characteristics of the GIL under different operating conditions are obtained to determine the relationship between the SF6/N2 mixing ratio and temperature rise. The simulation results provide a basis for choosing a suitable SF6/N2 mixing ratio for the GIL, which has a good engineering application prospect and is of great significance for reducing the use of SF6 and reducing the impact of power equipment on the environment.#$NLKeywords: GIL; SF6/N2 gas mixture; gas insulation; finite element method; thermal characteristics research |
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Keywords: | GIL SF6/N2 gas mixture gas insulation finite element method thermal characteristics research |
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