I some how made a program using windows batch file it took me 2 days (I'm really worse in programming)
We do have 30 Windows laptop and we have standardized the power settings should be same in all computers. All Computers don't have admin rights and are not in domain, so No GPO.
So the one manual option would be to go to each 30 computer give the user admin rights create powerplan set it and again revoke the admin privilege. Normal users were not able to change