| 引用本文: | 邓永清,阮江军,龚宇佳,黄道春,赵庆源.基于参数热等效的10 kV变压器温度流体场三维仿真计算[J].电力自动化设备,2021,41(4): |
| DENG Yongqing,RUAN Jiangjun,GONG Yujia,HUANG Daochun,ZHAO Qingyuan.Three dimensional thermal fluid field simulation of 10 kV transformer based on parameter thermal equivalence[J].Electric Power Automation Equipment,2021,41(4): |
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| 摘要: |
| 变压器温度流体场三维仿真是准确计算变压器绕组热点温度的重要方法，然而变压器绕组结构复杂，精确考虑绕组导线和绝缘结构的三维模型建模和网格剖分困难，同时计算效率低，难以满足实际工程需求。提出了一种配电变压器绕组结构的热等效简化分析方法，采用热导率各向异性、比热容等效的块状导体来等效实际的绕组结构。应用所提方法对一台S13-M-200 kV·A/10 kV型油浸式变压器三维温度流体场进行了计算。基于短路法的变压器温升试验结果表明：热等效参数方法大幅减少了变压器三维网格剖分数量，同时温度场计算结果能有效反映绕组轴向温度分布，热点温度仿真值与温升试验值温差相对误差不超过4 %，验证了所提方法的有效性与准确性。 |
| 关键词: 油浸式变压器 温度流体场 热等效 热点温度 |
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| 基金项目:国家自然科学基金智能电网联合基金资助项目(电力设备热点状态多参量传感与智能感知技术)(U2066217) |
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| Three dimensional thermal fluid field simulation of 10 kV transformer based on parameter thermal equivalence |
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DENG Yongqing1, RUAN Jiangjun1, GONG Yujia2, HUANG Daochun1, ZHAO Qingyuan3
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1.School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China;2.China Electric Power Research Institute, Wuhan 430074, China;3.Benxi Power Supply Company of Liaoning Electric Power Co.,Ltd.,Benxi 117000, China
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| Abstract: |
| The three-dimensional simulation of transformer temperature fluid field is an important method to accurately calculate the winding hot spot temperature. As the winding structure is complex, the winding modeling and mesh generation considering the detailed conductor and insulation are difficult, and the calculation efficiency is low, which is difficult to meet the actual engineering needs. A simplification method based on parameter thermal equivalence for the winding structure of 10 kV distribution transformer is proposed. The block conductor with anisotropic thermal conductivity and equivalent specific heat capacity are used to replace the actual winding structure, and the method is applied to calculate the three dimensional thermal fluid field of a S13-M-200 kV·A/10 kV oil immersed transformer. In order to verify the simulation model, the transformer temperature rise test based on the short circuit method is carried out. The results show that thermal equivalent parameter method can greatly reduce the mesh number of transformer, and the temperature calculate results can effectively reflect the axial winding temperature distribution, the maximum error between simulation and test result is less than 4 %,which proves the validity and accuracy of the proposed method. |
| Key words: oil-immersed transformer thermal fluid field thermal equivalence hot-spot temperature |
