浙江电力2023，Vol.42Issue(12)：36-44,9.DOI:10.19585/j.zjdl.202312005
油浸式变压器内部温度的热-流场耦合仿真与特性分析
Thermal-fluid field coupling simulation and characteristic analysis on internal tem-perature of oil-immersed transformers
摘要
Abstract
The temperature rise at winding hotspots is a critical metric for assessing the operational condition and re-maining lifespan of oil-immersed transformers.In the context of a 110 kV oil-immersed self-cooling transformer,a comprehensive two-dimensional closed-loop full-scale thermal-fluid simulation model incorporating the equivalent geometric structures of radiators is constructed.The model predicts temperatures with an error of less than 5℃when compared to temperature rise test results,demonstrating a high level of accuracy.Simulation results bring to light the presence of an oil stagnant zone within the horizontal oil duct of the windings.To optimize oil circulation in this area,the impact of horizontal oil duct width and the number of baffle plates on oil flow rate and winding temperature rise is analyzed.The study findings suggest that widening the horizontal oil duct reduces both the average winding temperature and hotspot temperature.Additionally,the installation of baffle plates significantly improves oil flow rate in the horizontal oil duct,consequently reducing the average winding temperature rise.Under the specified con-ditions,the installation of five baffle plates emerges as the optimal solution for achieving comprehensive heat dissi-pation performance.关键词
油浸式变压器/热点温度/热-流场耦合/温升试验/结构优化Key words
oil-immersed transformer/hotspot temperature/thermal-fluid field coupling/temperature rise test/structural optimization引用本文复制引用
邵先军,高一冉,金凌峰,詹江杨,郑一鸣,李元..油浸式变压器内部温度的热-流场耦合仿真与特性分析[J].浙江电力,2023,42(12):36-44,9.基金项目
国家自然科学基金项目(52107165) （52107165）
