Comparison of Development Trends of Various Insulators

Organic composite insulators are rapidly developing new material insulators, with small size, light weight, no need for zero value detection, and the hydrophobicity of silicone rubber materials can greatly improve the pollution withstand voltage of composite insulators. At present, the manufacturing level of various types of core rods has greatly improved, with stable quality and considerable production capacity, which can fully meet the needs of the organic composite insulator manufacturing industry.

The outstanding advantage of glass insulators is "zero value self explosion", so they have good application prospects in power grids that are prone to large-scale serious pollution.

Products with a crimping structure as the main component have become a representative of advanced technology and have been widely promoted and applied through continuous improvement in technology in recent years. The 750KV, 2L0-300KN composite insulators produced by China have passed national appraisal and are about to be put into operation. It can be said that the manufacturing level of composite insulators at this voltage level has reached the international advanced level. Porcelain insulators have good chemical and thermal stability, almost no aging and deterioration, and have good electrical and mechanical properties. New varieties such as large disc diameter, L00-400KN large tonnage, ordinary and bell shaped umbrellas have emerged. However, overall, the number of porcelain insulator production enterprises has not increased in recent years, but has decreased through integration and restructuring in the equally fierce market competition. DC insulator is a new type of insulator. Both domestically and internationally, organic composite insulators, porcelain insulators, and glass insulators have been applied to DC transmission lines. Although the quantity is not large, they have accumulated certain operating experience. Domestic research and development work mainly relies on several large manufacturing plants and research institutes, which provide a certain number of products for operation. In the future, with the construction of more than ten planned DC transmission projects in China, there will be a considerable demand for DC insulators. Long rod porcelain insulator is another new type of line insulator. This kind of insulator is mainly used in Europe, mainly in Germany, mainly because it inherits the advantages of suspension porcelain insulator and has the advantages of light weight (between disc suspension porcelain insulator and organic composite insulator), good anti-aging performance, high pollution resistance, strong white cleaning performance (the umbrella is an open aerodynamic type and does not need to be cleaned), simple and convenient use and maintenance, non breakdown, good and stable electrical performance, high anti damage strength and low operation and maintenance costs.