油浸式变压器用片式散热器参数研究与优化  

Study and optimization of panel-type radiator parameters for oil-immersed transformer

作　　者：苗阿乐 白晓春 朱超 王绿 刘迎文[1] MIAO Ale;BAI Xiaochun;ZHU Chao;WANG Lyu;LIU Yingwen(School of Energy and Power Engineering,Xi′an Jiaotong University,Xi′an 710049,China;State Grid Shaanxi Electric Power Company Research Institute,Xi′an 710100,China)

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049 [2]国网陕西省电力公司电力科学研究院,陕西西安710100

出　　处：《电力工程技术》2023年第4期206-214,共9页Electric Power Engineering Technology

基　　金：国家电网有限公司总部科技项目“基于多场协同理论的高温大负荷户内变电站降噪技术研究”(5226SX21001C)。

摘　　要：片式散热器对油浸式变压器的散热具有重要作用。为探究片式散热器结构参数对其散热性能的影响,以片高、焊道数量和焊道高度差为自变量,散热量和流动阻力为响应值,采用Box-Behnken设计(Box-Behnken design,BBD)方法设计多变量矩阵,利用STAR-CCM+对模型进行数值模拟并得到对应的响应结果;基于模型的散热量和流动阻力方差分析,获得二次回归模型,分析片高和焊道数量对散热量和流动阻力的交互影响;最终使用期望值法对片式散热器进行参数优化,确定最佳结构参数。结果表明:响应面预测值和模拟结果集中分布在回归线附近,误差在10%以内,满足工程设计要求;片高和焊道数量的增大均会导致散热量和流动阻力增大,但散热量和流动阻力对片高变化更敏感;片高为2483 mm、焊道数量为6、焊道高度差为60 mm时,片式散热器的散热性能最佳。Panel-type radiator plays an important role in the heat dissipation of oil-immersed transformers.To study the influence of structural parameters of panel-type radiator on its heat dissipation performance,the multi-variable design matrix is designed by using the Box-Behnken design(BBD)method.These three key parameters(the height of the panel-type radiator,the number of weld passes,and the difference of the weld pass height)are used as independent variables,and the heat dissipation and flow resistance are the response values.STAR-CCM+is used for numerical simulation of the model and corresponding response results are obtained.Based on the variance analysis of heat dissipation and flow resistance of the model,a quadratic regression model is obtained to analyze the interaction effects of the height of the radiator and the number of passes on heat dissipation and flow resistance.Finally,the desirability approach is used to optimize the parameters of the dispersion and determine the optimal structural parameters.The results show that the predicted values and simulation results are distributed around the regression line.The error between the predicted and simulation results is within 10%,which meets the requirements of engineering design.The increase in the height of panel-type radiator and the number of weld passes leads to an increase in heat dissipation and flow resistance,but the sensitivity of heat dissipation and flow resistance to panel-type radiator height is higher than the number of weld passes.The panel-type radiator has the best heat dissipation performance when the values of the panel-type height,the number of weld passes,and the difference of weld passes height are 2483 mm,6,and 60 mm respectively.

关 键 词：片式散热器 油浸式变压器 响应面方法 期望值法 散热性能 流动阻力 

分 类 号：TM403[电气工程—电器]