摘要
通过在变压器油中添加热导率高的氮化铝(AlN)陶瓷纳米颗粒,可以提高基础油的热导率;但随着混合油的热导率增大,其电气性能有所下降。文中选取的添加浓度,在满足设备电气性能的同时,也使混合油的导热性能大为提升。文中提出了纳米油变压器实际应用方案,通过试验研究了纳米油变压器自然负载、低负载运行及过负载运行工况等实际挂网运行性能,对比研究了纳米粒子的添加对变压器稳态和短时温升提升效果的差异,研究发现氮化铝纳米陶瓷粒子的添加能够加强变压器内部热量的传导,提高变压器的散热效率,但在较低的负荷工况下稳态温升降低幅度小于变压器高负载工况下短时温升的降低幅度。
Adding nano-AIN ceramic particles with high thermal conductivity into basic insulating oil of transformer can improve the oil’s thermal conductivity,however,the electrical performance of the transformer decreases with the thermal conductivity.This research selected proper additive concentration to significantly increase the thermal conductivity of the oil without reducing the electrical performance of the equipment.An application scheme was proposed.The transformer with the nano-AIN particles in insulating oil was tested in power network to understand its operation status in the conditions of natural load,low load,and over-load.The effects of the nano-additive on the steady-state temperature rise and short-time temperature rise of the transformer were analyzed comparatively.It was found that addition of the nano-particles could strengthen the heat conduction and improve the heat dissipation in transformer,and the decreasing amplitude of steady-state temperature rise in low load condition of the transformer was smaller than that of short-time temperature rise in over-load condition.
作者
任欢
寇晓适
马伦
赵磊
周远翔
王琪
REN Huan;KOU Xiaokuo;MA Lun;ZHAO Lei;ZHOU Yuanxiang;WANG Qi(State Grid Henan Electric Power Research Institute,Zhengzhou 450052,China;State Key Laboratory of Power System and Generation Equipment Control and Simulation of Tsinghua University,Beijing 100084,China)
出处
《高压电器》
CAS
CSCD
北大核心
2020年第2期93-100,107,共9页
High Voltage Apparatus
基金
国网河南省电力公司2015科研项目(1512).
关键词
氮化铝
纳米粒子
变压器
油热导率
温升
AlN
nano particle
transformer oil
thermal conductivity
temperature rise
