Doing a quick search, the blocks you have highlighted can be
- Fourier Analysis - abc to dq Transformation https://in.mathworks.com/help/sps/powersys/ref/abctodq0dq0toabc.html or Fourier Block https://in.mathworks.com/help/sps/powersys/ref/fourier.html
- Bus Connection - Three-Phase Bus Selector https://in.mathworks.com/help/simulink/slref/busselector.html or Three-Phase Voltage Measurement https://in.mathworks.com/help/sps/powersys/ref/threephasevimeasurement.html or Three-Phase Series RLC Branch https://in.mathworks.com/help/sps/powersys/ref/threephaseseriesrlcbranch.html or Three-Phase Transformer https://www.mathworks.com/help/sps/powersys/ref/threephasetransformertwowindings.html
Reading about them more can give you a way to get the right one.
Karan
