The oil companies may even fund your project, they are aware as I am of the guaranteed results !
The efficiency of taking heat generated by the coal to give you steam, along with
The efficiency of having the steam spin turbines or powering reciprocating pistons in cylinders, along with
The efficiency of rotating the generator magnets to generate electricity,
And don't forget the biggest factor of all, attempting to put AC power on the grid, isn't as easy as starting a car that has a dead battery by using jumper cables, the AC phase has to be in sync.
If we are still living in the 1930 early 1940s it would have been easier, after all power was still supplied to homes as 32 volts DC, Delco Remy was the battery company supplying battery banks so you can hook up to generators in case you lose power from the line.
To use steam driven power plants for local power, isn't a bad idea, as long as you are using that mechanical energy harnessed from the steam, ( making shingles, cutting wood, running water pumps, and all the stuff you see in county fair ) . But to even think of generating electricity from steam, no thanks, it's bad enough that most wind powered generators are nothing but scams.
T.Boune Pickens, already pulled the plug on his multi million dollars wind farm project. and if you and I have his money we can certainly burn ours.... Get a hint