dc = plugged in ac = battery
This is the only one you really want
Turns off sleep while plugged.
powercfg /x -standby-timeout-ac 0
The rest, work it out.
powercfg /x -hibernate-timeout-ac 0
powercfg /x -hibernate-timeout-dc 0
powercfg /x -disk-timeout-ac 0
powercfg /x -disk-timeout-dc 0
powercfg /x -monitor-timeout-ac 0
powercfg /x -monitor-timeout-dc 0
powercfg /x -standby-timeout-dc 0