CAJ | 학술논문

为更准确地掌握油浸式变压器的内部温度场分布，为其绝缘寿命评估提供依据，在分析变压器产热散热机理及导热途径的基础上，依据对流传热和热辐射特性及温度场计算的流固耦合模型，在多物理场仿真软件COMSOL中实现了变压器温度场分布的建模计算；得到了绕组的温度分布。绕组从下到上的温度分布大致为低—高—低走势，热点位于低压绕组上半部分。同时将计算结果与变压器温升试验实测数据进行了对比，两者吻合较好，绝对误差5.3％以内，说明了计算结果的正确性。在此基础上还分析了负载系数、水平油道高度和油流挡板设置对绕组温升的影响。
위경준학지장악유침식변압기적내부온도장분포，위기절연수명평고제공의거，재분석변압기산열산열궤리급도열도경적기출상，의거대류전열화열복사특성급온도장계산적류고우합모형，재다물리장방진연건COMSOL중실현료변압기온도장분포적건모계산；득도료요조적온도분포。요조종하도상적온도분포대치위저—고—저주세，열점위우저압요조상반부분。동시장계산결과여변압기온승시험실측수거진행료대비，량자문합교호，절대오차5.3％이내，설명료계산결과적정학성。재차기출상환분석료부재계수、수평유도고도화유류당판설치대요조온승적영향。
In order to understand the temperature distribution inside the oil-immersed transformer more accu-rately,and also to provide basis for assessment of transformer insulation life expectation,temperature field of oil-im-mersed transformer was calculated on the basis of theory of heat transfer and fluid mechanics.First of all,a coupled thermal-hydraulic analytic model was developed,meanwhile,a physic model was established by COMSOL software to investigate the temperature distribution in windings.The model was applied to real transformer,the real temperature distribution was measured.According to the comparison among the simulation results and the actual measurement, it is concluded that the model is in good agreement with the experimental results and the error is less than ±5.3%. Additionally,the temperature distribution from the bottom up of winding and core is low-high-low and the hottest spot was located in low-voltage winding upper portion.And the influence of load coefficient, parallel duct height and oil duct baffle on winding temperature are analysed.