  The German government recently announced that 80\% of the power supply should
come from renewable energy by 2030. One key task lies in reorganizing the
transmission system such that power can be transported from sites with good
renewable potentials to the load centers. Dynamic Line Rating (DLR), which
allows the dynamic calculation of transmission line capacities based on
prevailing weather conditions rather than conservative invariant ratings,
offers the potential to exploit existing grid capacities better. In this paper,
we analyze the effect of DLR on behalf of a detailed power system model of
Germany including all of today's extra high voltage transmission lines and
substations. The evolving synergies between DLR and an increased wind power
generation lead to savings of around 400 million euro per year in the short
term and 900 million per year in a scenario for 2030.
