| 摘要: |
| 随着电力装备向高电压、大容量与紧凑化方向发展,变压器内部的电磁、热、流体及结构等多物理场耦合问题日益复杂.本文研究了变压器多物理场建模的问题.首先,本文介绍了油浸式变压器的几何建模与数学建模方法,并阐述了电磁、热、流体等单物理场的数学方程以及多物理场耦合方法.随后,介绍了电力设备仿真的常用数值计算方法.随后利用这些方法,在应用层面,本文重点关注局部放电检测,尤其是超高频(UHF)定位技术,指出多物理场耦合建模与高精度数值计算为局部放电的精确定位与状态监测提供了理论支撑与方法参考. |
| 关键词: 多物理场耦合 高精度数值计算 油浸式变压器 局部放电检测定位 |
| DOI： |
| 分类号:O175.29;TM405 |
| 基金项目:国网山东省电力公司科技项目资助(520627250001). |
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| MULTIPHYSICS COUPLING MODELING AND NUMERICAL COMPUTATION FOR OIL-IMMERSED TRANSFORMERS |
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TIAN Peng1, Lü Jun-tao2, YAN Li1, REN Jing-guo2, WANG Yi-han3
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1.Information and Communication Company, State Grid Shandong Electric Power Company, Jinan 250002, China;2.State Grid Shandong Electric Power Company, Jinan 250002, China;3.Wuhan University, Wuhan 430072, China
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| Abstract: |
| With the development of power equipment toward higher voltage, larger capacity, and more compact configurations, the multiphysics coupling phenomena)covering electromagnetic, thermal, fluid, and structural fields)within transformers have become increasingly complex. This paper investigates the problem of multiphysics modeling of transformers. First, it introduces the geometric and mathematical modeling approaches for oil-immersed transformers, elaborating on the governing equations of individual physical fields, including electromagnetic, thermal, and fluid domains, as well as the methods for multiphysics coupling. Then, commonly used numerical computation methods for power equipment simulation are discussed. Based on these methods, at the application level, the paper focuses on partial discharge detection, particularly the ultra-high-frequency (UHF) localization technique. It is highlighted that multiphysics coupled modeling combined with high-accuracy numerical computation provides theoretical foundations and methodological references for precise partial discharge localization and condition monitoring. |
| Key words: Multiphysics coupling High-fidelity numerical simulation methods Oil-immersed transformers Partial discharge detection and localization |
