邵先军,高一冉,金凌峰,詹江杨,郑一鸣,李元
SHAO Xianjun,GAO Yiran,JIN Lingfeng,ZHAN Jiangyang,ZHENG Yiming,LI Yuan

• 1:国网浙江省电力有限公司电力科学研究院
• 2:西安交通大学电气工程学院

摘要(Abstract)：

绕组热点温升是评估油浸式变压器运行状态及剩余寿命的关键指标。以110 kV油浸自冷式变压器为研究对象，搭建包含散热器等效几何结构的二维闭环全尺寸热-流场仿真模型，模型预测温度与温升试验结果误差小于5℃，准确性较高。仿真结果显示绕组水平油道内存在油流静止段，为改善此区域的油流循环，分析了水平油道宽度和挡油板数量对油流速和绕组温升的影响规律。研究结果表明：加宽水平油道可降低绕组平均温度和热点温度；安装挡油板可显著提升水平油道油流速，降低绕组平均温升；所设置条件下，安装5个挡油板为综合散热性能最优方案。
The temperature rise at winding hotspots is a critical metric for assessing the operational condition and remaining 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 conditions, the installation of five baffle plates emerges as the optimal solution for achieving comprehensive heat dissipation performance.

关键词(KeyWords)： 油浸式变压器;热点温度;热-流场耦合;温升试验;结构优化
oil-immersed transformer;hotspot temperature;thermal-fluid field coupling;temperature rise test;structural optimization

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（52107165）

作者(Author): 邵先军,高一冉,金凌峰,詹江杨,郑一鸣,李元
SHAO Xianjun,GAO Yiran,JIN Lingfeng,ZHAN Jiangyang,ZHENG Yiming,LI Yuan

DOI: 10.19585/j.zjdl.202312005

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