I am beginner the V8i substation design, could you help me? how can we start?

Now, we start to design two (2) new 110kV substation, as below:

  • 1st substation: new one, not thing, we build it from land free area.
  • 2nd substation: from existing substation, we add one transformer bay and MV panel.

Please you help us for this, could you give to us the flow chart for design, then we will follow your guide line.