With the rapid development of power transmission and transformation industry, the application range of inorganic materials and organic materials as insulating materials is also expanding. However, the voltage level is constantly improving. In order to reduce the economic losses and casualties caused by pollution flashover accidents to a certain extent, silicone rubber has attracted extensive attention. It is necessary to analyze the application standard of silicone rubber in external insulation of power system, and study its practical application characteristics and evaluation.

Anti aging silicone rubber

Pollution flashover is one of the main fault forms of power system. The problem of external insulation anti pollution flashover has become an important topic for the safe and stable operation of power system. Due to its excellent anti pollution flashover performance, room temperature cured silicone rubber (RTV) has been widely used as a new material. The research shows that the component that fundamentally determines the long-term aging performance and hydrophobicity of RTV coating is the base glue content in the coating formula. However, the current national and industrial standards are still lack of testing for this item. Combined with the factors such as the limitations of on-site construction conditions, it is necessary to formulate feasible methods such as density analysis and Fourier transform infrared spectroscopy, which can effectively detect the content ratio of base glue and filler of commercial RTV products, and provide guidance for the pre network detection of normal temperature curing silicone anti pollution flashover coating for insulators.

The large-scale application of silicone rubber line insulators in China has greatly improved the external insulation level of China's power system. China has become the first country in the world to focus on organic external insulation in UHV AC and DC transmission systems. Organic external insulation represented by silicone rubber composite insulator is a hot spot in the field of external insulation of power system for many years. The problems in the operation of line composite insulators are classified and analyzed, and the market share and competitiveness of composite insulators and porcelain and glass insulators are analyzed and compared; The application of composite insulator in substation and converter station is discussed. The results show that it has obvious advantages and development prospects.