Omexom has secured a contract worth approximately NOK100 million with Hafslund Kraft to deliver critical 300 kV and 420 kV infrastructure for the rehabilitation of Nes power station in Hallingdal, Norway. The programme will include new high-voltage cables, a new switchgear facility and upgrades to existing high-voltage equipment. Planning is scheduled to begin in August 2026, with the wider power station rehabilitation expected to be completed in the first half of 2033. Working alongside Linjepartner, Omexom will support a long-term investment intended to extend the facility’s operational life, increase capacity and retain renewable electricity production for decades.

Major Grid Upgrade

The contract places Omexom at the centre of an extensive infrastructure renewal at Nes power station, which has operated since 1967. Its scope covers cable, equipment and line installations, addressing both 300 kV and 420 kV infrastructure as part of the plant’s wider modernisation programme.

For a hydroelectric station entering a new phase of operation, transmission connections and switching equipment are central to reliably moving generated electricity into the wider power system. The work will pair the installation of new high-voltage cables with the establishment of a new switchgear facility, while also renewing elements of the existing high-voltage installation.

Hafslund Kraft selected Omexom on the basis of price, technical solution and delivery capability. The award recognises the specialist expertise required for complex 420 kV projects, where technical planning and careful execution are vital to the resilience of the electricity network.

Supporting Renewable Generation

Nes power station is undergoing a comprehensive rehabilitation intended to extend its lifespan, raise capacity and adapt the facility to future requirements in Norway’s power system. The stated objective is to secure renewable energy production from the station for several more decades.

The investment illustrates the value of upgrading established generation assets alongside the development of new renewable capacity. Modern equipment and robust grid connections can help ensure that long-serving hydroelectric infrastructure remains fit for service as power-system requirements change.

The project’s focus on higher-voltage infrastructure is particularly relevant to the dependable transfer of electricity from the power station. By renewing key electrical assets, the programme is designed to strengthen the facility’s role in supplying renewable power while preparing it for future operational requirements.

Specialist Capability Required

The scale of the work reflects the technical demands of modernising high-voltage systems at operating generation sites. Omexom’s role covers infrastructure that spans cable, equipment and line installations, requiring specialist knowledge across transmission networks and high-voltage cables.

Lars Sannum, forretningsenhetsleder at Omexom, said:

“Det vil i årene som kommer være flere kraftverk som vil trenge tilsvarende oppgraderinger. Modernisering som dette er avgjørende for å sikre kapasitet, forsyningssikkerhet og videre utvikling av kraftsystemet i Norge. Det krever fagfolk med spesialkompetanse, og det er en kompetanse det tar år å bygge”

The project points to a wider need for skilled delivery teams as ageing energy assets are renewed. The combination of high-voltage technical work and a live, long-term rehabilitation programme places a premium on coordination, planning and established delivery experience.

Coordinated Delivery Programme

Omexom will undertake the assignment in collaboration with Linjepartner. The infrastructure works will run in parallel with other rehabilitation activities at the power station, making close coordination between the parties an integral part of the programme.

Planning begins in August 2026, ahead of a delivery timeline that aligns with completion of the overall power station rehabilitation in the first half of 2033. The extended schedule reflects the breadth of the modernisation programme and the need to integrate multiple workstreams at the site.

For Hafslund Kraft, the project represents a substantial commitment to retaining the value of an established renewable generation asset. For Omexom and Linjepartner, it provides an opportunity to apply specialist high-voltage expertise to infrastructure designed to support capacity, security of supply and the continued development of Norway’s electricity system.

Long Term Power System Value

The Nes programme brings together plant rehabilitation and grid infrastructure renewal in a single long-term effort. Its planned cable, switchgear and high-voltage upgrades are intended to give the facility the electrical foundation needed for its next decades of operation.

As more existing power stations require similar upgrades, projects of this kind will remain important to maintaining reliable renewable electricity supplies. Omexom’s NOK100 million contract offers a focused example of how specialist transmission infrastructure can support the continued contribution of established hydropower assets to Norway’s power system.