Single Line Schematic

Hi

I am doing a project on power systems and I need to come up with a single line schematic to cover the following,"interconnected generators,transmission system,distribution system, industrial and low voltage loads,relevant transformers and small scale generation.The schematic should show at least two feeders in all systems to allow for duality of supply and one spur feeder should be annotated with relevant voltage levels"

I've been looking about but can't find much.Any help would be greatly received