摘要
为研究复合绝缘子绝缘清洗剂浸润污层沿面放电特性,首先对3种污秽等级硅橡胶试样分别用水和清洗剂进行完全浸润处理,测量各组试样闪络电压和泄漏电流;然后利用扫描电子显微镜及X射线能谱仪检测分析污层表面结构组分的变化;最后采集沿面放电电弧发射光谱,并利用电弧图像提取算法分析绝缘清洗剂对沿面电弧通道的影响。试验结果表明,随着污秽等级升高,绝缘清洗剂对湿润污层沿面放电抑制效果越明显。对于湿润污层表面,绝缘清洗剂自行铺展覆盖形成致密保护膜,并渗透于其中,阻碍可溶性盐分在水中溶解、电离和激发,同时挥发吸收表面污层热量,阻碍污层内部电子跃迁;对于电弧通道,绝缘清洗剂会使其扭曲程度随着污秽等级升高进一步加剧,加快电弧通道能量的耗散,从而加强抑制效果。
In order to study the surface discharge characteristics under the condition of insulation cleaning agent,three kinds of silicone rubber samples are completely soaked with water and cleaning agent,respectively,and the flashover voltage and leakage current of the samples are measured.Then,scanning electron microscopes and energy dispersive spectrometers are used to analyze the changes of structural components on the surface of the pollution layer.Finally,the arc emission spectrum of surface discharge is collected,and the effect of insulation cleaning agent on surface arc channel is analyzed by arc image extraction algorithm.The test results show that with the increase of pollution grade,the effect of insulation cleaning agent on surface discharge of wet pollution layer is more obvious.For the surface of the wet dirty layer,the insulating cleaning agent spreads and covers itself to form a dense protective film,and penetrates into it,preventing the soluble salt from dissolving,ionizing and exciting in the water,and volatilizing absorbs the heat of the surface dirty layer and prevents the electronic transition inside the dirty layer.For the arc channel,the insulation cleaning agent will further aggravate the distortion degree with the increase of pollution level,accelerate the energy dissipation of the arc channel,and strengthen the inhibition effect.
作者
吴田
刘鑫源
WU Tian;LIU Xinyuan(College of Electrical Engineering and New Energy,China Three Gorges University,Yichang 443002,China)
出处
《湖南电力》
2024年第3期75-82,共8页
Hunan Electric Power
基金
国家自然科学基金项目(51807110)。
关键词
复合绝缘子
绝缘清洗剂
沿面放电
发射光谱
图像提取
composite insulator
insulation cleaning agent
surface discharge
emission spectrum
image extraction
