摘要
为研究气压、湿度及老化时间对硅橡胶复合绝缘子电晕老化过程的影响,首先构建气压、湿度可调的硅橡胶电晕加速老化试验平台,采用正交试验法开展了硅橡胶材料的电晕老化试验,对老化后的试样进行了热刺激电流(TSC)测试、扫描电镜(SEM)和傅里叶红外光谱(FTIR)测试。基于陷阱电荷量的极差结果表明:气压水平的变动对陷阱电荷量的影响最大,其次是湿度和老化时间;同时,通过TSC和SEM分析发现,低气压下,湿度越高,试样的陷阱电荷量越多,且老化时间越长,湿度的影响越显著;随着气压的升高,湿度对陷阱电荷量的贡献逐步减少,而与老化作用时间有关,老化时间越长,试样的陷阱电荷量越多。同时,通过TSC测试、SEM和FTIR测试得到的老化程度排序结果并不一致,而TSC测试结果能够更全面地体现由于材料物化缺陷而导致的电晕老化特性。因此,可将TSC测试结果作为老化程度的有效判据。
We studied the corona aging characteristics of silicone rubber composite insulator by orthogonal tests in order to study the effects of pressure, humidity and aging time on the corona aging process. Meanwhile, we constructed a corona accelerated aging test platform of silicon rubber with adjustable air pressure and humidity , and used thermally stimulated current (TSC), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) to test the aged samples. The results of the range analysis showed that the changes of the pressure had the most significant influence on the trap charges,followed by the humidity and the aging time. Combined with TSC and SEM, it was found that there was more trap charges when the humidity was higher, and the humidity was more significant with the longer aging time. However, it could be seen from the TSC, SEM and FTIR tests that the results of aging states were inconsistent, and TSC tests had more influences on the corona aging characteristics caused by physical and chemical defects. Therefore, TSC results could be used as an effective criterion for the aging states.
作者
梁英
董平平
高丽娟
LIANG Ying;DONG Pingping;GAO Lijuan(Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense, North China Electric Power University,Baoding 071003, China;Suqian Power Supply Branch, State Grid Jiangsu Electric Power Supply Co., Ltd., Suqian 223800, China;Hengshui Power Supply Branch, State Grid Hebei Electric Power Supply Co., Ltd., Hengshui 053000, China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2018年第12期4083-4089,共7页
High Voltage Engineering
基金
国家自然科学基金(51207055)
河北自然科学基金(E2013502213)~~
