Try {
  $HighPerf = powercfg -l | %{if($_.contains("High performance")) {$_.split()[3]}}
  $CurrPlan = $(powercfg -getactivescheme).split()[3]
  if ($CurrPlan -ne $HighPerf) {powercfg -setactive $HighPerf}
} Catch {
  Write-Warning -Message "Unable to set power plan to high performance"
}