Hi to all I started with a base design from RCN_Sailor (search on Yeggi or Cults3D). I modified some of the pieces and recombined others, then made my own additions and interior structures. I reworked the smoke stack to have more detail, larger dimensions and company logo. I expanded the main walls to about 2x the original. The component files are on TInkerCad. I might add some more details...
www.tinkercad.com
www.tinkercad.com
www.tinkercad.com
www.tinkercad.com
All of the files are open for downloading.

3D design Power Plant Stack- resized RCN_Sailor base - Tinkercad
3D design Power Plant Stack- resized RCN_Sailor base created by undefined with Tinkercad

3D design Power Plant roof and second floor-open windows and interior - Tinkercad
3D design Power Plant roof and second floor-open windows and interior created by undefined with Tinkercad

3D design Second roof plate- RCN_Sailor base - Tinkercad
3D design Second roof plate- RCN_Sailor base created by undefined with Tinkercad

3D design Power Station-walls RCN_Sailor base design- expanded - Tinkercad
3D design Power Station-walls RCN_Sailor base design- expanded created by undefined with Tinkercad