Spread across two locations and coupled with hydropower stations, Germany’s RWE is building a battery storage system with a total capacity of 117 MW, to be installed at its power plants in Lingen (Lower Saxony) and Werne (North Rhine-Westphalia).
These batteries will be virtually coupled with RWE’s run-of-river hydro power stations along the Mosel River. By increasing or decreasing the flow at these power stations, RWE can make additional capacity available, also as balancing energy. This coupling process raises the total capacity of the batteries by another 15%, according to a press release. This the battery and the hydropower stations work hand-in-hand to help keep the frequency in the power grid stable.
Around €50 million is being invested in this project. The system is scheduled to start operations at the end of 2022.
“Battery storage systems are essential to the success of the energy transition. They help balance out fluctuations in the power grid, which are increasing as the share of renewable energies grows. Our project is setting new standards and shows how we can offer the market even more flexibility by intelligently linking up battery capacity with run-of-river power stations,” explains Roger Miesen, chief executive officer of RWE Generation.
“Large battery storage systems in the megawatt category make a key contribution towards network stability in the new energy world,” said NRW State Minister for Economic Affairs and Energy Andreas Pinkwart. “The implementation of this project at a power station with a tradition as long as Werne’s demonstrates impressively how competence and innovative technologies can be used to design the secure energy supply of the future. With its energy storage systems in Werne and Lingen, RWE sets new standards and can become a role model for many other projects around the transformation of our energy system.”
The planned system comprises 420 lithium-ion battery racks housed in 47 overseas shipping containers spread across two RWE power stations. The system at the Gersteinwerk in Werne will have a capacity of 72 MW, while the one at the Emsland station in Lingen will have 45 MW.
The fact that RWE has all the necessary expertise within the company —battery competency, understanding of the market and years of experience in operating power stations — formed the basis for developing this innovative solution. The company already operates battery storage systems in the U.S., Germany and Ireland.