I would like to integrate a transformer into my model to simulate a different electrical grid level. However, when connecting to a connector of the grid model, the model becomes singular. Why?

Transformers are treated differently in the equation system of Green City models due to the definition of the voltage level. Therefore, please select the ‘Transformer’ option for the ‘OutputType’ parameter in the grid model. You will then receive an additional connector for connecting a transformer above the model. The procedure is similar for hierarchical grids (several grid models) and the DC grid (inverter on the DC grid).