In the smart grid, grid operators have a considerably broader range of tasks than in conventional power grids. Energy generators and additional consumers must be integrated into the grid operation. Due to the current transitions in the energy, transport and heat sectors, large amounts of power exist at the low voltage levels. These must also be managed in order to maintain grid stability. In this case, the control and regulation of the grid requires an intelligent infrastructure of components. Our control room in the Digital Grid Lab allows us to evaluate new operating concepts.