大型油浸式变压器绕组温度场仿真及验证  

Simulation and Verification of Winding Temperature Field for Large Oil Immersed Transformer

作　　者：武卫革[1] 杜振斌 刘刚[2] 李杰[1] 韩贵胜[1] WU Weige;DU Zhenbin;LIU Gang;LI Jie;HAN Guisheng(Hebei Provincial Key Laboratory of Electromagnetic&Structural Performance of Power Transmission and Transformation Equipment,Baoding Tianwei Baobian Electric Co.,Ltd.,Baoding 071056,China;Key Laboratory of Transmission and Transformation Equipment Security Defense,North China Electric Power University,Baoding 071003,China)

机构地区：[1]保定天威保变电气股份有限公司河北省输变电装备电磁与结构性能重点实验室,河北保定071056 [2]华北电力大学河北省输变电设备安全防御重点实验室,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2020年第6期68-74,共7页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家重点研发计划项目(2017YFB0902703);国家自然科学基金资助项目(51407075).

摘　　要：随着计算机技术的发展,仿真计算逐渐应用到大型变压器绕组温升优化设计中,为了验证仿真计算结果的有效性,在现有大型油浸变压器绕组温度实验平台上,针对强油导向(ODAF)冷却方式开展了功率损耗为55 kW,流量为10 m^3/h绕组温度实验测量工作,实验平台采用空心无感绕组,有效避免了绕组涡流损耗计算不准确造成的热源误差,绕组的轴向、辐向方向布置测温点共计44个。基于有限体积法对该实验工况下绕组的导向板、匝绝缘、油道结构等进行精细化建模仿真计算,对比结果验证了仿真计算的有效性,仿真结果得出了绕组温度随轴向、辐向方向变化规律及绕组的热点位置,为大型变压器绕组温度场优化设计提供参考。With the development of computer technology,simulation is gradually applied to the optimization design of winding temperature rise of large transformer.To test simulation results,this paper carries out an experimental measurement on the conditions of 55 kW power loss and 10 m^3/h flow rate in Oil Directed and Air Forced(ODAF)cooling mode.The experiment is conducted on the existing experimental measurement platform for winding temperature of large oil immersed transformer.The platform adopts air core non-inductive coil with 44 temperature measuring points in the axial and radial directions,avoiding the heat error caused by inaccurate calculation of winding eddy current loss.Based on the finite volume method,we carry out detailed modeling and simulation calculation of the oil washers,turn insulation and oil duct structure of the winding.The measurement points were compared to verify the effectiveness of the simulation.The simulation results reveal the temperature changing regularities at axial and radial directions and the hot spot location of the winding,providing reference for the optimal design of winding temperature field of large transformer.

关 键 词：大型油浸式变压器 绕组温度场 实验平台 热点位置 

分 类 号：TM401[电气工程—电器]