I am having connection error of transformer with the asynchronous machine/ wind turbine (DFIG)

Error:The following two blocks cannot be connected in series:

Block 1: 'A_stator: Asynchronous Machine pu Units1'

Block 2: 'transfo_1_winding_1: Three-Phase Transformer (Two Windings)'

The first block, modeled as a current source, cannot be connected in series with the inductive element of the second block.

Add a high-value resistance in parallel with one of the two block.

You can also specify high-value resistive snubbers if the blocks have a snubber device.You can avoid the use of the snubber by selecting the 'Continuous' simulation type in the Solver tab of the Powergui and deselecting the 'Disable ideal switching' option in the Preferences tab of Powergui block.

Answer 1

[Sabin]

This is specific to specialized power systems. Inductors are modelled as current sources and cannot be in series without an alternative path. It is not possible to have two current sources in series. You can add a resistive path to ground between the two current sources which is known as a snubber resistor. The value of this snubber resistor will have some impact on the simulation speed/performance. The smaller the snubber, the simulation will be faster but less accurate.