2. Tutorial - Structure of energy system models
Grids, nodes and units
Grids
Grids are essentially groups of nodes with a common form of energy. The primary purpose of the grid dimension is to organize the nodes into grids so that the results are easier to decipher. Furthermore, the diffusion and transfer of energy between nodes located in different grids is not permitted directly. Instead, controlled transfer of energy between grids is referred to as “conversion” and handled by certain types of units, which will be explained later. However, it would make no difference for the functioning of said conversion unit even if all the nodes were included in the same grid. Diffusion between grids is not currently possible, even though it could possibly have some niche applications.
Source: VTT. Energy Network Structure: Introduction to Grids, Nodes and Units. Gitlab.vtt.fi/backbone, 2019.