Planning criteria for future transmission networks in the presence of a greater variability of power exchange with distribution systems

The volumes of Distributed Energy Resources (DER) connecting to the electricity system at lower voltages are rapidly increasing. Together with more active distribution system management, smart grids and demand response, this means grid planning methods and assumptions must adapt. In particular, quantity and quality of data exchanged between TSO-DSO need to be improved. This report suggests how the TSO-DSO data exchange should evolve for future-proof grid planning.