On Monday, June 4, 2018, a ground-breaking ceremony paved the way for the start of construction works of a 10 MW battery storage project in the North German municipality Bordesholm. RES Deutschland GmbH is building the project for the utility VBB. The battery storage will provide grid stabilisation and back-up power – fed from 100% renewable energies – to Bordesholm, if there is a main grid disruption or upstream grid failure. A first on the public power supply network, this unique project has been funded by the EU and supported by the federal state of Schleswig-Holstein.
The German energy transition is picking up speed; as the share of renewable energy is growing, there is an increasing need for intelligent grid solutions, especially for frequency stabilization. Bordesholm currently meets 75% of its electricity demand with renewable energy sources, which are directly connected to the public electricity grid. VBB is aiming to raise the figure to 100% by 2020. In addition to providing control power, VBB's 10MW battery storage with a storage capacity of 15MWh can continue to provide power to Bordesholm if there is a grid outage.
Frank Günther, Managing Director of VBB, said "This is a unique solution for an island network linking into a public power supply network. With this smart solution, the use of coal and nuclear power plants can be avoided in the future. New, modern battery storage plants can ensure the required system stability by using only renewable energy".
Pilot project VBB: Autonomous supply from renewable energies
The testing of the island operation in Bordesholm for the municipal power supply from renewable energy is funded as a pilot project by EU and the state of Schleswig-Holstein. Schleswig-Holstein is promoting the development of storage technologies for the German Energy Transition 2.0. In addition to the technical solution for frequency stabilization, the project has a positive contribution to achieving the German climate targets defined by the Federal Government: a saving of 12,000 tonnes of CO2-equivalent per year makes this project possible. In addition, the battery storage will generate sufficient funding for the refinancing by providing primary control power to the energy market.
"With this stand-alone solution, the battery storage becomes a flagship project, which forms a very important component on the way to a supply from 100 % renewable energy," emphasizes Dominique Guillou, Managing Director of RES Deutschland GmbH.
Battery storage as a building block of the German Energy Transition 2.0
Battery storage systems, as offered by RES in Germany and Europe, are ideally suited for the provision of ancillary services: when supply is greater than demand the battery absorbs the surplus energy and can feed it back into the grid when demand is greater than supply. This ensures a balance between energy consumption and production. Battery storage systems also compensate for voltage fluctuations in the power grid within seconds in order to keep the grid frequency precisely stable at 50 hertz.
"Battery storage systems are central elements of the German Energy Transition 2.0. In the coming years, due to the increasing displacement of thermal power plants by renewable energy sources, the provision of primary control power with battery storage systems will continue to gain importance in Germany" said Matthias Leuthold, Head of Energy Storage at RES Germany.
The VBB-project is the first multi-megawatt battery storage project in Germany. The commissioning of the battery storage is scheduled for spring 2019. After the completion of this pilot project, research institutions and universities will be able to use the data generated from the battery storage to transfer new findings to other network projects.
RES (Renewable Energy Systems) is one of the world’s leading independent renewable energy companies. At the forefront of renewable energy development for over 30 years, RES has developed and/or built over 16GW of renewable energy capacity worldwide. RES' core activities are onshore wind, offshore wind, solar, energy storage and transmission. RES is headquartered in the United Kingdom and operates across the globe.