I need to allow WakeTimers (computer wake up from sleep/hibernation) for all power plans set on plugged in to Enabled.
It appears that you can use WMI to change the setting.
http://www.daniweb.com/software-development/csharp/threads/272577
Microsoft has a WMI code creator that will help you out:
https://www.microsoft.com/download/en/confirmation.aspx?displayLang=en&id=8572
You will want to search under "root\CIMV2\power" for the power management stuff.