摘要
变压器油的绝缘性能是影响电力设备安全运行的关键因素。采用氟化和直流电晕充电处理聚丙烯无纺布,并将其用于变压器油的净化,考察其过滤性能。结果表明:在氟化过程中,聚丙烯的部分C-H键被C-F键取代,同时聚丙烯纤维的平均直径减小,粗糙度增加,制备得到了超疏水滤膜。将氟化后的滤膜进行电晕充电并用于变压器油的净化发现,过滤后的油样相对于用原始滤膜过滤后的油样绝缘性能得到更多恢复,击穿电压升高,微水含量、相对介电常数和介质损耗因数降低。
The insulation property of transformer oil is a critical factor affecting the safe operation of power equipment.The nonwoven polypropylene(PP)electret films used for purification of transformer oil were treated by fluorination and DC corona charging,and the oil filtration properties were investigated.The results show that the C-H bonds in polypropylene can be replaced by C-F bonds during fluorination process and the mean diameter of fibers decreases while the roughness of the fibers increases,which represents the super-hydrophobicity.When the fluorinated PP films were corona charged and applied to transformer oil filtration,it was observed that the aged oil filtered by the modified films got a better recovery of insulation properties in comparison to that of oil filtered by original PP films.There was a great increase in the breakdown voltage.Furthermore,the content of moisture,the relative dielectric permittivity and loss factor decreased significantly.
作者
王飞鹏
万春香
穆朋
李剑
黄正勇
黄镜亮
WANG Feipeng;WAN Chunxiang;MU Peng;LI Jian;HUANG Zhengyong;HUANG Jingliang(State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400044,P.R.China;Chongqing Yuneng Oil-filter Manufacturing Co.Ltd.,Chongqing 400707,P.R.China)
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第8期39-49,共11页
Journal of Chongqing University
基金
重庆市重点产业共性关键技术创新专项重点研发项目(cstc2017zdcy-zdyfx006)~~
关键词
变压器油净化
直接氟化
电晕充电
驻极体
transformer oil filtration
direct fluorination
corona charging
electret
