Today electric distribution grids are subject to many influencing factors such as new generators, storage facilities and consumers. As a rule, not all of the information required for optimal operation is available. Therefore, Fraunhofer ISE offers various methods for (synthetically) mapping the local generation and consumption structure. Among other things, our scientifically based synthetic consumption profiles allow new load situations, such as those caused by electric vehicles, to be considered. The state of electrical grids can be estimated and used as the basis for use planning of controllable generators and storage facilities. The planning also includes the optimal control of grid components, such as adjustable local grid transformers or voltage stability using reactive power.