Vattenfall is planning to upgrade four existing hydro power stations in Sweden which could provide an additional 730MW of capacity.
The Swedish developer is looking to carry out works in 2026, which are expected to be completed by 2032, and has started pre studies to prepare for an upcoming investment decision for each project.
It plans to renew and reinstate a hydro power unit that is currently out of operation at the Harsprånget power station on the Lule älv river which could provide up to 110MW of additional capacity.
The decision to invest is planned for 2024 and commercial operation is anticipated in 2026.
There are also plans to increase water flow and generation at the Porjus power station on the Lule älv river in Norrbotten to deliver a potential capacity of up to 80MW.
A final investment decision (FID) is expected in 2026, with commercial operations due before 2031.
Vattenfall is also conducting a pilot study to investigate reinstating the Juktan power station on the Storjuktan lake adjacent to the Umeälven river in Västerbotten, to a pumped storage plant with a capacity of up to 380MW.
A decision to invest in the site is planned for 2027 and commercial operations would start in 2031.
Meanwhile, the Swedish developer is also planning to install a fourth unit at the Messaure power station on the Lule älv river with a capacity of up to 150 MW.
FID is planned for 2028 and commercial operations is earmarked for 2032.
Vattenfall head of hydro power operations in the Nordics Johan Dasht said: “It is truly a pleasure to announce our plans to build new hydro power in Sweden. If these projects are in fact put in motion, it will mean a substantial increase in output when we need it the most.
“This is necessary to meet the rising demand for fossil-free electricity, which is a must if we are to reach our climate goals.
“Hydro-power reservoirs are Sweden’s green batteries and by adding new flexibility and balancing capabilities, we are paving the way for a greater proportion of wind and solar power in the electrical system.
“Vattenfall strives to continue developing hydro power to meet the increased demand. Its great capacity to store energy in dams and its capacity for control are enormous assets.
“In the pre studies, we will analyse the consequences on the environment, technology and the impact on local stakeholders. And, where appropriate, we will also consult with those affected.”