The distribution of electrical energy is a challenge of the energy transition. To achieve a higher utilization of the grid infrastructure, the project is researching a switch to direct current.
The use of direct current (DC) in distribution grids enables a significantly higher utilization of the grid infrastructure and thus reduces the use of resources for grid expansion. This means that significantly more energy can be distributed with the same amount of material compared to today's AC technology. The project will develop the technological basis for a new, fully inverter-fed distribution grid based on DC technology for urban areas, which can take over the tasks of today's grid levels 5-7 (medium and low voltage).
The conversion of distribution grids to DC technology is a comprehensive socio-technical transformation that is not only technologically feasible, but must also be accepted and supported by the various stakeholder groups involved in the transformation. Accordingly, the communicative involvement of affected stakeholder groups (system operators, appliance manufacturers, tradespeople, the general public, etc.) is an important part of the project in order to develop a realistic roadmap for the transformation process. In addition to the technical issues, research is also being conducted into the communication measures required for the associated change process.
VERNEDCT is expected to produce innovations in the following areas in particular:
New architecture and methods for distribution grid operation
Methods for optimal component utilization (increasing full load hours) through storage management and power flow control
Methods for fault clearing through converters and switching devices
New converter topologies for use in DC distribution grids
Methods and specifications for "plug & operate" control of converters
Concept of loss-minimizing hybrid switchgear for continuous operation
Transformation path with roadmaps for the asset management of distribution grid operators,
Technology development and demand group-specific communication concepts for transformation processes
The expected results of the project are
A scalable target grid topology for distribution grids in DC technology,
A corresponding protection and operating concept,
The selection and design of converter topologies for specific tasks in the distribution grid,
Methods for converter control and
Communication concepts that contribute to the successful implementation of DC technology.