It would probably be easier to use a single controlled voltage source and directly manipulate the sine wave fed into it from Simulink (turn on filtering at the simulink to ps converter if you do this), however, you can use the ideal switch (multiple required to attatch different loads) https://www.mathworks.com/help/sps/ref/idealsemiconductorswitch.html
or you can use something like the double pole throw switch: https://www.mathworks.com/help/sps/ref/dpstswitch.html?s_tid=doc_ta
Regards,
Joel
