摘要
自冷型油浸式变压器是电力系统的重要设备,其寿命与安全性与中心温度息息相关。为获得变压器散热特性,进一步优化其散热能力,通过计算流体力学(CFD)对自冷型油浸式变压器进行数值仿真研究,获得其温度分布,分析自然对流换热条件下变压器散热片的散热特性。通过试验验证CFD仿真的可靠性,散热片中心流道表面温度的仿真与试验结果相对误差约为5%。在不破坏变压器本体、不影响变压器使用的前提下,提出管式和板式两种变压器外部辅助水冷设备并进行数值仿真研究。结果表明,设置板式和管式辅助装置的散热片进出口温差比无辅助设备的温差分别增加了23.1℃和3.6℃。使用外部辅助设备能显著改善自冷型油浸式变压器的散热特性。
Self-cooled oil-immersed transformer is an important facility in the electrical power system,whose safety and life are relevant to the working temperature.To gain the characteristics of its heat transfer and optimize the ability of the radiator,a CFD numerical simulation of self-cooled power transformer has been carried on.According to the temperature distribution of the transformer,the natural convection heat dissipation characteristics of the radiator have been discussed.The reliability of CFD simulation is verified by experiments.The relative error between simulation and test results is about 5%.Without breaking the structure and affecting the use of the transformer,a pipe type and a floor type water-cooled exterior auxiliary equipment was studied by numerical simulation.The results show that both the pipe and the floor water-cooled exterior auxiliary equipment can significantly improve the effect of heat dissipation.Compared with the heat sink without cooling equipment,in turn,the temperature difference between the inlet and outlet of the radiator increases 23.1℃and 3.6℃at the floor and the pipe types.
作者
张斌
井萍
铁子甲
丁文超
付涛
苏阳
陈雪江
ZHANG Bin;JING Ping;TIE Zijia;DING Wenchao;FU Tao;SU Yang;CHEN Xuejiang(State Grid Weinan Electric Power Supply Company,Weinan 714000,Shaanxi,China;School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《科技和产业》
2023年第8期247-254,共8页
Science Technology and Industry
关键词
油浸式变压器
散热器
计算流体力学(CFD)
试验验证
外部辅助水冷设备
换热特性
self-cooled oil-immersed transformer
radiator
computational fluid dynamics(CFD)
experimental verification
exterior auxiliary water-cooled equipment
heat transfer characteristics
