Today there is an overhead line between Hamang and Smestad substations. Statnett has now launched a study to identify feasible technical solutions for a new electricity interconnector on the section.
This is important in order to acquire sufficient knowledge to ensure well-founded assessments and a sound decision-making basis. Consequently, we will study both powerlines and underground cable as potential technical solutions. We will also make socio-economic analyses and map buildings, infrastructure, roads and the environment.
We do not know today how the final solution will be. This is what we will find out through our current assessment work. Our primary objective is to build a robust and future-oriented electricity connection for the Greater Oslo main grid.
After the assessment has been conducted, Statnett will apply for a licence from the Norwegian Water Resources and Energy Directorate (NVE), probably first half of 2019. During the licensing process, the NVE will submit the application for consultation, and all affected parties will have an opportunity to give their comments. Licences for the energy sector are considered in accordance with the Norwegian Energy Act. The new electricity connection will be completed over the next ten years, at the earliest.
This project is part of The Greater Oslo Grid Plan ensuring a reliable supply of electricity to Oslo and Akershus in the years to come. Click here to read more about the grid plan.
The current overhead lines between Hamang and Smestad were built in 1952. They are approaching the end of their technical lifespan and need upgrading. In addition, growth in electricity consumption in Oslo and Akershus could happen fairly soon, according to the consumption prognoses for the Greater Oslo Grid Plan.
To handle the growth in consumption, we will begin with measures that give the fastest increase in capacity. On cold winter days, supply to Greater Oslo is from the west. Consequently, we need to reinforce one of the interconnectors from that direction.
A renewed electricity connection from Hamang to Smestad will be the quickest measure and important for the power system. Statnett has therefore started studying a potential interconnector from Hamang to Smestad, which will replace the current 300-kV overhead line.
Bærum substation is located between Hamang and Smestad. This station also needs upgrading.