HVDC transmission is an efficient technology designed to deliver large amounts of electricity over long distances with negligible electrical losses. AC (electrical) systems that must be connected must be synchronized. This means that they must operate at the same voltage and frequency, which can be difficult to achieve. HVDC is used to connect AC systems. When DC is converted to AC, there is a lot of heat produced and that damages the system over time. Therefore a reliable cooling system is important and Teesing components can contribute to this. The cooling is effectuated with cooling elements that are placed in between the units that have an inlet and an outlet with an SO PVDF connection that is guided to the central manifold. The quality of the materials is of great importance because of the high risks associated with fluid leakage in an electricity environment. Serto PVDF couplings are used in this cooling system for their reliability and quality.
PVDF VERSUS STAINLESS STEEL
The most common choice in this type of application stainless steel components due to its proven reliability and durability. However, in most applications PVDF performs the same or better with a lower total costs of ownership (a reduction of 75%).
It is important to understand the properties of the materials, for example the pressure, temperature and chemical properties of the medium. For the cooling system of the converter valve, the parameters mentioned are very suitable for PVDF.
As described in our customer story about China’s longest HVDC link from State Grid China, Siemens China had prescribed Serto PVDF combined with FEP tubing, which are also used in their European facilities. A number of other brands of plastic couplings were tested, but because the system is so complex, Serto PVDF was found to be the best option. And the customer prefers the high-quality products from Serto.
ADVANTAGES OF PVDF
- Low price
- Short delivery times
- Total cost of ownership will drop from 100% to 25%
- Chemical resistance
- Light weight
- Insulator for heat
- Insulator of materials (no guidance for corrosion)