树脂浇注干式变压器温度场及流场的数值计算

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摘要树脂浇注干式变压器的绝缘性能与其内部温度场分布密切相关。为了更准确地分析干式变压器的内部温度分布情况,根据树脂浇注干式变压器三维实体结构模型,建立了变压器内部温度场及周围流场的数学计算模型。依据传热学和计算流体力学原理,利用有限元法,对干式变压器温度场及流场进行数值分析,对比了干式变压器在不带外壳和带外壳、自然散热和强制冷却四种状态下内部温度场分布情况,给出了在四种状态下最热点所处的位置以及与端部的温差,从而指出了干式变压器运行中的薄弱环节,为干式变压器的定点温度监测提供了理论依据。

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	熊兰
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	刘钰

关键词 ：干式变压器, 温度场, 流场, 有限元法, 数值计算

Abstract：The insulation property of cast resin dry-type transformers is closely related to its internal temperature field distribution. In order to analyze the temperature field of dry-type transformers more accurately, a mathematical model of cast resin dry type transformer temperature field and flow field was established based on building up the three-dimensional physical structure model. Meanwhile a numerical analysis was conducted for such coupled field with finite element method according to heat transfer theory and computational fluid dynamics(CFD). Comparison is carried out among various distribution of internal temperature field of dry type transformers on four conditions, that is without shell or with shell, by natural cooling or forced cooling. Moreover, the hottest position under different conditions are shown, as well as the temperature difference between the hottest point and the terminals. The weak links of dry-type transformers on operation are pointed out, which may give a theoretical base to locate the points for real-time temperature monitoring dry-type transformers.

Key words： keywords：Dry-type transformer temperature field flow field finite element method numerical calculation

收稿日期: 2012-09-20 出版日期: 2013-12-12

PACS:

TM412

基金资助:国家重点基础研究发展计划(973计划) (2009CB724508-1) 资助项目。

作者简介: 熊兰女，1972年生，博士，教授，从事电气设备在线智能化监测技术、脉冲功率技术、数字化仪器设备方面的研究。赵艳龙男，1985年生，硕士研究生，从事干式变压器在线监测与故障诊断技术方向的研究。

引用本文:

熊兰, 赵艳龙, 李剑, 周为, 朱强, 刘钰. 树脂浇注干式变压器温度场及流场的数值计算[J]. 电工技术学报, 2013, 28(1增): 138-145. Xiong Lan, Zhao Yanlong, Li Jian, Zhou Wei, Zhu Qiang, Liu Yu. Numerical Calculation of Temperature Field and Flow Field in Cast-Resin Dry-Type Transformer. Transactions of China Electrotechnical Society, 2013, 28(1增): 138-145.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2013/V28/I1增/138

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