Construction of 220 kV transmission line Kröflulína 3

  • Zemlja: Iceland
  • Lokacija: Iceland
  • Godina: 2019-2021
  • Investitor: Landsnet, Iceland
  • Status: finished
  • Dužina: 122 km

The project significance:

The Kröflulína 3 transmission line will connect the Krafla geothermal power plant and the Fljótsdalur hydropower plant, or electricity system in the north and east of the country. It was built with the aim of improving the electricity transmission system, increasing stability and quality of energy supplies. In addition, the significance of this project is reflected in the fact that this is the first step in building a new generation of transmission lines, and also the largest project in the field of transmission lines construction in this country in the last 30 years.

Elnos Group works:

The construction of the 220 kV transmission line Kröflulína 3, the first new generation transmission line in Iceland, is one of the most significant projects of Landsnet, as the investor. The Kröflulína 3 project had many challenges. Let’s not forget that this is the terrain where the astronauts prepared for their expeditions, so we can freely say that each pillar place hid some specificity. Behind our team is a long and exciting journey that involves working on this project.
The first step was the installation and erection of 328 transmission line tubular towers, whose height is up to 31 meters and which together weigh over 2,500 tons. The second step of the process is the assembly of the conductor. These are specific conductors with a cross-section of 911 mm2, with steel cores used for areas with high additional loads. The installation of conductors of such a large diameter is in itself extremely demanding, and in difficult winter working conditions with strong wind gusts it is an extremely difficult job.

The role of the new generation of regional transmission lines:

Their purpose is to eliminate many shortcomings that make Iceland’s main distribution system’s operation difficult today. It will work at a higher voltage level, ie. at 220 kV instead of 132 kV. The poles are made of steel pipes that are more resistant to storms and ice, which will significantly increase the security of supply.