Uniper’s Production Facilities in Sweden

Power Plants for Fossil-Free Electricity Production

Thanks to electrification, Sweden has excellent opportunities to succeed in its transition to fossil-free energy while remaining a competitive nation. At Uniper, we believe in a future where Sweden has reached its climate goals through a digitized industry and an electrified transport sector. We also envision a future with new electricity-intensive industries — such as fossil-free chemicals, electrofuels, and a growing cyber industry. It’s a future that is bright, exciting, and powered by electricity. 

Nuclear power

Nuclear power accounts for around 30 percent of Sweden’s electricity production. Uniper takes full responsibility for its share of Sweden’s nuclear power and holds a unique position as a stakeholder in all of the country’s nuclear power plants: Oskarshamn, Ringhals, and Forsmark. We also own the Barsebäck plant, currently the site of one of Europe’s most advanced decommissioning projects.

Today, Uniper operates six reactors, which we continuously develop and invest in to ensure efficient, long-term operations for decades to come. 

Hydropower

As Sweden moves toward greater electrification and more power is generated from weather-dependent sources such as solar and wind, the need for fast, flexible regulation increases. Hydropower plays a key role in this. Uniper owns and operates around 70 hydropower plants in Sweden, with a total installed capacity of approximately 1,700 MW. Together, these plants account for around 10 percent of Sweden’s total hydropower production.

Our hydropower plants are strategically located along major rivers such as Göta älv, Lagan, Ljungan, Indalsälven, Faxälven, and Ångermanälven, home to some of Sweden’s largest hydropower facilities. The oldest plant still in operation is Hemsjö Övre, in the Mörrumsån river, commissioned in 1907. 

Solar and Wind Energy

As part of the energy transition, Uniper is developing solar and wind power projects in Sweden. Our focus is on land-based facilities, often in collaboration with landowners, forestry companies, and municipalities. These projects are developed with the ambition to quickly contribute to new fossil-free electricity generation, while also respecting local conditions and needs.

Uniper is active across the entire value chain, from project development to operations, and aims to develop 10 GW of solar and wind power to ready-to-build status across Europe over the next decade. In Sweden, this serves as an important complement to our existing nuclear, hydro, and thermal reserve power, contributing to a robust, sustainable, and balanced power system. 

Together with Solgrid AB, Uniper is developing the Segås and Segerhult solar parks. 

Power Plants for System Stability 

The power grid must be balanced every minute of every day. This is challenging, as electricity cannot be stored on a large scale. That’s why backup capacity is crucial, available at any time, regardless of weather or season. 

Karlshamn Power Plant 

Karlshamnsverket is a peaking and reserve power plant with the capacity to supply electricity during times of high demand or system imbalance. It can, for example, be used during capacity shortages and is capable of starting up and delivering power to the grid within two hours. The plant also provides ancillary services, procured by Svenska kraftnät (Sweden's Authority of Electricity Contingency Planning), helping maintain grid frequency at 50 Hz. Although oil-fired, the plant is equipped with advanced flue gas cleaning technology that significantly reduces emissions of nitrogen and sulfur oxides, as well as particulates. 

Öresundsverket

Öresundsverket in Malmö is a modern gas-fired power plant, commissioned in 2009. It was decommissioned in 2016 for market-related reasons. As of 2023 it is part of Sweden’s electricity preparedness, following a decision by Svenska kraftnät.

The plant is responsible for maintaining so-called “island mode operation,” ensuring power supply within a geographically limited area. Öresundsverket covers the Malmö and Skåne regions and is ready to support the system in case of a major blackout disconnected from the national grid. 

Open-cycle gas turbines (OCGTs)

Uniper operates a total of nine gas turbines in Sweden, with a combined installed capacity of more than 500 MW. These turbines are extremely fast-starting — the fastest can reach full output in under three minutes. All of Uniper’s gas turbines are part of Svenska kraftnät’s reserve assets for grid congestion management. They are activated during major disturbances, such as unexpected outages at power plants. The primary fuel is Light Fuel Oil No. 1,commonly referred to as diesel, though some units have been converted to run on renewable fuel, such as hydrotreated vegetable oil (HVO). 

Production Facilities for Fossil-Free Transport

The transport sector faces a significant and challenging transformation. Today, it accounts for one third of Sweden’s total greenhouse gas emissions. Meeting the sector’s future electricity demand will require a well-balanced electricity system that makes use of all fossil-free power sources.

Electrofuels

Uniper is working to enable large-scale electrofuel production in Sweden. We are engaged across the entire value chain, from hydrogen production using renewable electricity, to the capture and transport of biogenic carbon dioxide from the forest industry and bioenergy plants. Together with partners, we are building the infrastructure and capacity needed for a new generation of sustainable fuels.

Hydrogen

Uniper sees hydrogen as a key part of tomorrow’s fossil-free energy system. Since 1992, we have been producing fossil-free hydrogen at OKG in Oskarshamn. The process uses electricity from the nuclear plant and water from our own water treatment facility to run a 0.7 MW electrolyser. The hydrogen is used to cool generators, and the surplus is sold commercially.

We are also part-owners of Liquid Wind, which develops facilities to produce eMethanol from hydrogen and biogenic carbon dioxide, powered by wind energy.

In Luleå, we are leading the forward-looking BothniaLinkH2 project together with Luleå Port. The aim is to establish a regional hydrogen hub where fossil-free hydrogen can be used in industry, shipping, or for export. 

Power plants in Sweden