Pu-Bai 750kV Transmission Project: Toughened Glass Insulator Solution

Reliable Glass Insulator Solutions for High-Voltage Power Transmission in Dusty and Icy Environments

The Pu-Bai 750kV Transmission and Transformation Project is a key extra-high-voltage (EHV) power grid project in Shaanxi Province, China. The project includes the construction of a new Pu-Bai 750kV Substation and approximately 175.6 km of 750kV overhead transmission lines.

By adopting a π-connection mode, the project is integrated into the existing 750kV power grid, helping strengthen the regional grid structure in Weinan and improve the transmission capacity for renewable energy generated in northern Weibei.

For such a high-voltage transmission project, reliable insulation performance is essential to ensure long-term power transmission safety and grid stability.

The transmission lines are located in a loess tableland area, where heavy dust accumulation creates demanding operating conditions for overhead transmission equipment.

The combination of airborne dust, pollution deposits and seasonal icing places higher requirements on the performance of transmission line insulators. Under these conditions, conventional insulation solutions may face increased risks of surface contamination, leakage current and flashover.

Therefore, the project requires a high-performance glass insulator solution with strong resistance to pollution, reliable mechanical strength and stable operation under cold and harsh environmental conditions.

For high-voltage transmission lines such as the Pu-Bai 750kV project, toughened glass insulators provide several advantages for long-term outdoor operation.

The glass insulator is designed to provide reliable electrical insulation and mechanical support between the conductors and transmission towers. Its toughened glass body offers high mechanical strength and excellent resistance to environmental conditions, making it suitable for extra-high-voltage transmission applications.

In dusty areas, the surface characteristics of glass help maintain stable insulation performance under contaminated conditions. Combined with appropriate insulator string design and pollution-level considerations, the glass insulator solution can help reduce the risk of pollution flashover and improve transmission reliability.

For areas affected by low temperatures and icing, the mechanical and environmental resistance of the insulator is also an important consideration. The selected 750kV glass insulator solution is designed to withstand the mechanical and electrical stresses associated with high-voltage overhead transmission systems.

A 750kV transmission line operates under demanding electrical and mechanical conditions. The glass insulator must therefore provide consistent performance throughout its service life.

Key performance considerations for this type of application include:

• High mechanical strength for reliable support under transmission line loads
• Excellent electrical insulation performance for 750kV EHV applications
• Strong pollution resistance for dusty and contaminated environments
• Reliable performance under low-temperature and icing conditions
• Stable outdoor performance under long-term exposure to weather and environmental changes
• High visibility of glass components, supporting easier visual inspection of insulator strings

These characteristics make toughened glass insulators a suitable solution for high-voltage transmission projects where safety, reliability and long service life are critical.

The Pu-Bai 750kV project also plays an important role in supporting the delivery of new-energy power from northern Weibei.

As wind and solar power generation continues to expand, modern transmission networks require reliable EHV infrastructure capable of transmitting electricity over long distances.

High-performance glass insulators for power transmission are an important component of this infrastructure. By providing reliable insulation and mechanical support, they contribute to the safe and stable operation of transmission lines and substations.

With extensive experience in the production of toughened glass insulators, Tailun Electric provides insulation solutions for high-voltage and extra-high-voltage power transmission applications.

Our glass insulators are manufactured under controlled production and quality inspection processes and can be supplied for different voltage levels, mechanical load requirements and environmental conditions.

For projects involving 750kV transmission lines, substations, renewable energy transmission and harsh outdoor environments, Tailun Electric can provide customized glass insulator solutions based on project requirements.

Looking for reliable glass insulators for 750kV transmission lines or other EHV power projects? Contact Tailun Insulator for technical support and product solutions.