BiSS – Bidirectional Sector coupling & Storage utilization optimization

When it comes to renewable self-generated electricity in the housing industry and small (service) companies, without battery storage, often only 30-55% of the self-generated electricity can be consumed locally. As a result, 50-70% of the electricity is now almost always fed into the public grid and often has to be distributed across regions by distribution and transmission system operators to ensure grid stability. In the area of public charging infrastructure, on the other hand, unplanned peak loads often occur, which can overload local distribution grids.

The BiSS project therefore aims to connect the unpredictable and expensive peak loads from decentralized public charging points via a balancing group with stationary private electricity battery storage systems in the housing industry and small businesses. In this way, unavoidable peak loads from the public charging infrastructure can be absorbed in a way that benefits the grid. In addition, the same battery storage systems can temporarily store self-generated electricity from locally produced green electricity or bidirectionally charging electric vehicles and make it available to local consumers in a grid-friendly manner, increasing local consumption to 70-90%. This creates an energetic and economic win-win situation for charging station operators and the housing industry or small (service) companies, as the investment and operating costs for grid-friendly stationary battery storage systems can be shared between these parties.

H-BRS is developing a digital twin of a grid section to investigate possible load peaks or voltage band violations caused by the charging infrastructure. This model approach enables a digital representation of the grid section and thus extended grid studies. In addition, H-BRS is setting up a test infrastructure for SecondLife batteries and charging stations using hardware-in-the-loop. In this laboratory setup, the grid section, including public charging infrastructure, is digitally mapped and the effects on the grid section are investigated.