摘要
油浸式变压器主要由铁芯、绕组、绝缘系统和散热器构成,通过改变散热器的位置可以改变油箱进口处的油速,进而影响绕组的热点温度.通过有限元法,建立变压器在不同进口油速时绕组区域温度场与流场的流固耦合模型,分析绕组在不同进口油速时的热点温度变化,并通过光纤温度传感器直接测温实验验证模型的有效性.通过对比不同进口油速时绕组热点温度可知,油速在0.002~0.03 m/s之间,随着油速的增加绕组热点温度降低了3.2 K;在0.03~0.05 m/s之间,随油速增加热点温度降低缓慢,温度降低了0.5 K.
Oil-immersed transformers are mainly composed of iron cores, windings, insulation systems and heat sinks. By changing the position of the radiator, the oil speed at the fuel tank inlet can be changed, which in turn affects the hot spot temperature of the winding.This paper uses the finite element method to establish the fluid-solid coupling model of the temperature field and the flow field of the winding area of the transformer at different oil inlet speeds.The hot spot temperature changes of the windings at different inlet oil velocities are analyzed and verified by direct temperature measurement experiments with optical fiber temperature sensors.By comparing the winding hot spot temperature at different inlet oil velocities, we find that the winding hot spot temperature decreases by 3.2 K as the oil velocity increases between 0.002 and 0.03 m/s.Between 0.03~0.05 m/s, the hot spot temperature decreases slowly with the increase of oil velocity, and the temperature decreases by 0.5 K.
作者
刘畅
赵振刚
黄嘉
张长胜
LIU Chang;ZHAO Zhengang;HUANG Jia;ZHANG Changsheng(Faculty of Information Engineering and Automation,Kunming University of Science and Technology,Kunming 650500,China)
出处
《昆明理工大学学报（自然科学版）》
CAS
北大核心
2020年第4期85-90,共6页
Journal of Kunming University of Science and Technology(Natural Science)
基金
国家自然科学基金项目(51667011)
云南省基础应用研究基金项目(2018FB095)
关键词
油浸式变压器
进口油速
流固耦合
热点温度
oil-immersed transformer
inlet oil velocity
coupled heat transfer
temperature distribution
作者简介
刘畅(1994-),男,硕士研究生.主要研究方向:变压器温升研究.E-mail:734012328@qq.com;通信作者:赵振刚(1981-),男,博士,副教授.主要研究方向:变压器温升研究、光纤传感器的应用.E-mail:292738069@qq.com
