Economical and with great potential for the future
With its investment of some 100 million euros, STEAG becomes a pioneer in the use of large-scale battery systems. STEAG is convinced of the economy and viability of the technology and is investing this amount without availing itself of subsidies. To get a certain distribution in the grid, the large-scale batteries are being installed at six German power plant sites: Lünen, Herne and Duisburg-Walsum in North Rhine-Westphalia and Bexbach, Völklingen-Fenne and Weiher in the Saarland. The large-scale batteries make use of the infrastructure of the power plant sites, but operate independently. Conducing to their economical operation is, not least of all, their integration in the virtual power plant OneOpt, which integrates the distributed and central systems of STEAG (see www.steag-oneopt.com). One advantage: for the required backup STEAG does not have to build redundant systems at the sites. Should a battery fail, the needed primary reserve power can be provided from another source in the “virtual power plant” that is prequalified to provide primary reserve power. This substantially reduces the cost of the systems.
The system in Lünen will be put through trial operation from June to August 2016 before Trading & Optimization begins marketing. The experience will be applied to the building of the other systems so that all six large-scale battery systems will be in commercial operation by the beginning of 2017.