How I model Scott Transformer using Simulink?

I have produced this moder, 3ph 230kV Line to Line source aimed to deliver 25kV on the secondary windings, however the results are not as expected. The approach of the scott transformer is based on the number of turns , but I cannot input the number of turns in the multiwinding transformer. Instead, I need to input nominal voltages and I do not know how to do it. Any suggestions?