摘要
憎水性丧失导致硅橡胶绝缘子污闪是电力系统稳定运行的潜在隐患,为了快速在线提升染污硅橡胶表面憎水性,使用脉冲高压电源以空气作载气产生滑动弧等离子体(功耗仅12 W),对不同种类自然积污和不同灰密人工染污硅橡胶试样改性实验。结果表明,脉冲滑动弧处理能短时间内大幅提升鸟粪染污试样憎水性。对于人工染污硅橡胶试样,滑动弧扫描60~90 s,便使0.125 mg/cm^(2)和0.25 mg/cm^(2)灰密试样表面接触角由50°左右提升至超过130°,而未处理试样自然迁移数天也难以达到同样效果。发射光谱、扫描电子显微镜及傅里叶变换红外光谱分析表明,滑动弧能够破坏硅橡胶表面污层的致密结构、制造出大量微孔,加速硅橡胶中小分子硅氧烷迁移至污层表面。污闪试验结果表明,滑动弧处理后人工染污硅橡胶试样污闪电压有了较大提升。
The pollution flashover of silicone rubber(SR)insulators caused by loss of hydrophobicity is a potential risk for stable operation of power system.To operate online and quickly improve the hydrophobicity of contaminated SR sur-face,pulsed high-voltage power supply was used to generate gliding arc(GA)plasma with ambient air as the carrier gas.Modification was carried out on different species natural polluted SR samples and SR samples after artificial contamina-tion with different non-soluble deposit density.The results showed that the hydrophobicity of the bird droppings fouled SR samples was obviously increased in short time.For the artificial pollution SR samples with a non-soluble deposit den-sity of 0.125 and 0.25 mg/cm^(2),the contact angle increased from about 48°to more than 130°after 60~90 s of scanning.The same effect could not be seen in samples without GA plasma treatment after several days of natural migration.Opti-cal emission spectroscopy(OES),scanning electron microscopy(SEM)and Fourier transform infrared(FTIR)spectroscopy analysis revealed that the GA plasma breaks the compact structure of the contamination layer and produces large number of micropore,which makes it faster for the low molecular weight siloxanes(LMWs)in the SR to migrate to the contamination layer surface.The results of the pollution flashover test show that the pollution flashover voltage of the artificial polluted samples after GA plasma treatment has been greatly improved.
作者
余嘉川
徐岸非
黄邦斗
邓禹
刘健犇
刘宇舜
YU Jiachuan;XU Anfei;HUANG Bangdou;DENG Yu;LIU Jianben;LIU Yushun(Hubei Collaborative Innovation Centre for High-efficiency Utilization of Solar Energy,Hubei University of Technology,Wuhan 430068,China;Beijing International S&T Cooperation Base for Plasma Science and Energy Conversion,Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China;China Electric Power Research Institute,Beijing 100192,China;State Key Laboratory of Power Grid Environmental Protection,Wuhan 430074,China;State Grid Anhui Electric Power Research Institute,Hefei 230022,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2023年第8期3324-3334,共11页
High Voltage Engineering
基金
国家自然科学基金(51925703,51907190)
安徽能源互联网联合基金(2108085UD14)。
关键词
脉冲放电
表面改性
硅橡胶
憎水性
污闪
pulsed discharge
surface modification
silicone rubber
hydrophobicity
pollution flashover
