Tuna Substation is a 400kV substation located in Tuna, Kalmar, Sweden.

The Tuna Substation project’s construction has begun in 2020. The works are expected to be commissioned in 2025.


Tuna Substation project, which is an upgrade substation, will be operated by Svenska Kraftnat.

The designed voltage level of the substation is 400/220kV and the operating voltage level is 400/220kV.

The step-in voltage of the project is 400kV and the step-out voltage is 220kV.

Tuna Substation project development status

The development of the Tuna Substation project was approved by Swedish Energy Markets Inspectorate in 2020. The project is expected to be commissioned in 2025.

About Svenska Kraftnat

Svenska Kraftnat (Svenska) is a state-owned electric utility. It develops, operates, and maintains the national transmission system in Sweden. The company balances production and consumption of electricity system in the country. It also carries out electricity contingency planning and is financed through government funding. Svenska conducts research and development to increase the transmission network’s operational reliability, efficiency and sustainability. The company constructs communications network for telecommunications and data for maintaining operational reliability in the grid. It has offices in Sundsvall and Solleftea. Svenska is headquartered in Sundbyberg, Sweden.


All publicly-announced T&D Line & Substation projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects is sourced through secondary information sources such as country specific utility players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.