1.湖北省输电线路工程技术研究中心(三峡大学), 湖北 宜昌 443002
2.三峡大学电气与新能源学院, 湖北 宜昌443300
3.武汉大学电气与自动化学院, 武汉 430072
4.南方电网科学研究院, 广州 510663
刘振邦(1999),男,硕士研究生,从事变压器多物理场计算研究,1229026437@qq.com;
杜志叶(1974),男,通信作者,教授,博士,研究方向为多物理场耦合仿真计算、电力系统电磁环境、特高压直流关键技术,duzhiye@163.com;
黎鹏(1989),男,副教授,博士, 研究方向为电力设备智能运维、电工装备多物理场分析,lipeng_ctgu@163.com。
收稿:2024-09-08,
网络首发:2024-12-30,
纸质出版:2026-08-20
移动端阅览
刘振邦,杜志叶,黎鹏等.基于参数等效及改进混合剖分的变压器绕组温升研究[J].南方电网技术,2026,20(08):104-113.
LIU Zhenbang,DU Zhiye,LI Peng,et al.Research on Temperature Rise in Transformer Windings Based on Parameter Equivalence and Improved Hybrid Profiling[J].Southern Power System Technology,2026,20(08):104-113.
刘振邦,杜志叶,黎鹏等.基于参数等效及改进混合剖分的变压器绕组温升研究[J].南方电网技术,2026,20(08):104-113. DOI: 10.13648/j.cnki.issn1674-0629.2026.08.009.
LIU Zhenbang,DU Zhiye,LI Peng,et al.Research on Temperature Rise in Transformer Windings Based on Parameter Equivalence and Improved Hybrid Profiling[J].Southern Power System Technology,2026,20(08):104-113. DOI: 10.13648/j.cnki.issn1674-0629.2026.08.009.
变压器绕组热点温度是制约其带负载能力和运行寿命的决定性因素。以一台S20-M-630 kVA/10 kV油浸式配电变压器为研究对象,建立了包含外壳散热片在内的三维电磁-温度-流体耦合模型。针对其绕组内部结构复杂、流固边界层网格质量差、计算效率低下等问题,提出了绕组参数等效方法与结合映射剖分和自由剖分的混合网格剖分技术。该方法不仅显著提升了绕组热点温度的计算精度,还优化了流固边界层的网格质量,大幅提高了计算效率。结果表明:绕组参数等效方法能有效反映变压器实际工作中绕组的温度分布,混合剖分相比与全自由剖分达到相同结果下的整体三维网格数量和仿真时间分别减少了73.60%、82.50%,绕组热点温度仿真值与试验值相对误差不超过1%。
Load capacity and operating life are governed by the hot spot temperature of the transformer windings. A three-dimensional electromagnetic-temperature-fluid coupling model including the shell heat sink is established with an S20-M-630 kVA/10 kV oil-immersed distribution transformer as the research object. Aiming at the problems of complex internal structure of the winding
poor mesh quality of the fluid-solid boundary layer
and low computational efficiency
a winding parameter equivalence method and a hybrid mesh profiling technique combining mapping profilings and free profilings are proposed. The method not only significantly improves the accuracy of the calculation of the winding hot-spot temperature
but also optimises the mesh quality of the fluid-solid boundary layer
which significantly improves the calculation efficiency. The results show that in actual transformer operation
the winding temperature distribution can be effectively reflected by the winding parameter equivalence method
and compared with free profiling
hybrid profiling reduces the overall number of 3D meshes and simulation time by 73.60% and 82.50%. The relative error between the simulated and experimental values of the winding hot-spot temperature shall not exceed 1%.
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