http://blogs.technet.com/b/heyscriptingguy/archive/2012/09/18/create-a-powershell-scheduled-job.aspx
$dailyTrigger = New-JobTrigger -Daily -At "2:00 PM"
$option = New-ScheduledJobOption -StartIfOnBattery -StartIfIdle
Register-ScheduledJob -Name UpdateHelp -ScriptBlock {Update-Help -Module * -Force} -Trigger $dailyTrigger -ScheduledJobOption $option
To look at the scheduled job, open the Task Scheduler MMC by typing the following command.
Taskschd.msc
Need note that Powershell schedule job is actually create task in Windows task scheduler, if you have no permission to task scheudler (e.g. on your company PC), you are unable to do this in Powershell as well.