根据常见的干式变压器环氧树脂配方，制作了环氧树脂试样，在100、130、160℃下进行热老化试验，测试试样的介电性能，研究介电常数及介质损耗随老化时间与老化温度的变化规律。结果表明：随着老化时间与温度的增加，试样在相同电场频率下的介电常数与介质损耗因数增大；随着老化时间的增加，试样的电气强度随着介质损耗因数的增加而降低，环氧树脂的绝缘性能降低。
Epoxy resin samples were made according to the common epoxy formula for dry-type transformer, and the samples were thermal aged at 100℃, 130℃, and 160℃ respectively. Their dielectric property was tested, and the change law of dielectric constant and dielectric loss with ageing time and ageing temperature was studied. The results show that with the increase of ageing time and temperature, the dielectric constant and dielectric loss of samples at the same frequency increase. With the increase of ageing time, the electric strength of samples increases with the decrease of dielectric loss, which indicates that the insulating properties of epoxy resin decreases.
参考文献
| [1] | 赵艳龙 .树脂浇注干式变压器温度场数值计算及在线监测系统研究[D].重庆大学,2013. |
| [2] | Pierce L.W..Hottest spot temperatures in ventilated dry type transformers[J].IEEE Transactions on Power Delivery,19941(1):257-264. |
| [3] | 柳再本.干式变压器绝缘树脂老化的试验分析[J].变压器,2006(07):29-33. |
| [4] | 熊兰;赵艳龙;杨子康;宋道军;席朝辉;何为.树脂浇注干式变压器温升分析与计算[J].高电压技术,2013(2):265-271. |
| [5] | 陈平;陈辉;蹇锡高;高巨龙;张岩.环氧树脂体系固化反应及其复合材料介电性能[J].高分子通报,2003(4):1-9. |
| [6] | 徐曼;冯军强;曹晓珑.纳米银-环氧树脂复合电介质的介电特性[J].中国电机工程学报,2009(4):117-122. |
| [7] | 高铭泽 .纳米SiO2复合环氧树脂中纳米粒子分散性与介电性关系[D].哈尔滨理工大学,2014. |
| [8] | 朱兴松;刘立柱;张国伟;邓涛;方兰.环氧树脂/蒙脱土纳米复合材料的介电性能研究[J].绝缘材料,2005(2):27-29,33. |
| [9] | 李永刚;崔伟;张喜乐;王建民;韩冬杰.干式变压器绕组热点温度的一种计算方法[J].变压器,2011(8):5-8. |
| [10] | 郭永基;颜寒;肖飞.环氧树脂热氧老化实验研究[J].清华大学学报（自然科学版）,2000(7):1-3. |
| [11] | Santanu Singha;M. Joy Thomas.Dielectric Properties of Epoxy Nanocomposites[J].IEEE transactions on dielectrics and electrical insulation: A publication of the IEEE Dielectrics and Electrical Insulation Society,20081(1):12-23. |
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