until 31.12.2023
Electricity distribution grids are characterized by sub-grids dominated by generators and consumers as well as sub-grids with constantly changing power flow directions that are locally adjacent but electrically unconnected. As a result, wind turbines are sometimes switched off in one sub-grid in order to prevent grid overload, while the consumption or storage systems in a neighboring sub-grid could absorb some or all of this excess power.
Medium-voltage direct current (MVDC) short couplings can be used to avoid the shutdown of renewables, to make optimum use of the existing grid infrastructure and to limit the expansion of the grid infrastructure for newly installed generators, consumers, energy storage systems and power-to-X systems such as electrolysers to an acceptable level.
In the project, typical grid topologies at medium-voltage level are identified, described and systematized in cooperation with grid operators. A simulation is being used to investigate the scenarios and boundary conditions for which MVDC short-circuiting makes sense.
Open questions for use are identified and solutions are developed on the basis of which network operators can start their network planning. In addition to the technical characteristics, the legal framework is also examined. The synchronized further development of the technical characteristics and the legal framework opens up new potential for the restructuring of the electricity supply.
