Composite insulators are widely used in power systems and play a crucial role in transmission lines and substations, providing electrical insulation and mechanical support. 

Below is an overview of the main applications and features of composite insulators:

1. Transmission Lines

    High Voltage (HV) and Extra High Voltage (EHV) Transmission Lines: Composite insulators are commonly used in HV and EHV transmission lines as suspension or post insulators. They can withstand high electrical voltages and mechanical loads while offering excellent pollution flashover resistance.

    Harsh Environments: In coastal areas, industrial pollution zones, and high-altitude regions, the corrosion resistance and pollution flashover performance of polymer insulators make them an ideal choice.

 2. Substations

     Busbar Support: In substations, composite insulators are used to support busbars, providing both electrical insulation and mechanical stability.

     Equipment Connection: They are also used to connect transformers, circuit breakers, and other equipment, ensuring reliable and safe electrical connections.

3. Electrified Railways

    Overhead Catenary Support: In electrified railway systems, composite insulators are used to support overhead catenary systems, offering electrical insulation and mechanical stability.

    Vibration and Shock Resistance: Composite insulators exhibit excellent resistance to vibration and shock, making them suitable for the dynamic loads encountered in railway environments.

 4. Distributed Generation and Renewable Energy

     Wind Farms and Solar Power Plants: In wind farms and solar power plants, composite insulators are used to support transmission lines and equipment, adapting to complex climatic and environmental challenges.

 5. Other Applications

     High-Voltage Equipment Testing: Composite insulators are also used in high-voltage laboratories and equipment testing as insulating support components.

     Special Environments: In extreme conditions such as high temperatures, low temperatures, and strong UV radiation, composite insulators outperform traditional ceramic or glass insulators.

 Features of Composite Insulators

     Lightweight and High Strength: Composite insulators are lightweight, making them easy to transport and install, while also offering high mechanical strength.

     Excellent Weather Resistance: They exhibit strong resistance to UV radiation, corrosion, and aging, making them suitable for various climatic conditions.

     Superior Pollution Flashover Performance: Their hydrophobic surface ensures reliable insulation performance even in polluted environments.

     Low Maintenance Costs: Composite insulators are less prone to breakage, have a long service life, and require minimal maintenance and replacement.

 Conclusion

Composite insulators, with their excellent electrical and mechanical properties, are widely used in power systems, railways, renewable energy, and other fields, particularly excelling in harsh environments. With advancements in material technology, the application scope of composite insulators will continue to expand.