沿室温硫化硅橡胶表面及瓷表面染污放电现象的研究

The Study on the Discharge along RTV Coated Insulators and Porcelain InsulatorsState Key Laboratory of Electrical Insulation for Power Equipment

在绝缘子表面涂覆一层憎水涂料，可显著提高绝缘子的耐污闪能力，实践证明这是防止污闪事故的一项有效措施。室温硫化硅橡胶涂料是一种新型防污、憎水、长效涂料，与常用涂料相比，室温硫化硅橡胶涂料具有涂覆简单、维护方便、寿命长的特点，目前已在我国许多地方投入使用。为了更好地了解室温硫化硅橡胶涂料的耐污闪能力，本文借助高速摄相机，拍摄了沿室温硫化硅橡胶表面和瓷表面污闪放电的全过程。通过照片，可以看出沿室温硫化硅橡胶涂料表面的污闪过程明显不同于沿瓷表面的污闪过程，借助记录波形并结合理论分析，揭示了两者不同放电现象的本质差别。

The hydrophobic coating on the surface of insulator may increase the flashover voltage of contaminated insulator The room temperature vulcanizing(RTV)silicone rubber coating has been used in China to prevent pollution flashover of insulator due to its long service life and convenience The discharge phenomena along surface with or without RTV coating observed with high-speed camera were studied