如何使用 Powershell 更改 Windows 10 中的电源计划并在长脚本后恢复到原始设置？

Question

如何制作一个 PowerShell 脚本来检查当前的电源计划，将其更改为“高性能”（如果还没有），然后运行一个很长的 PowerShell 脚本，然后在该脚本之后切换回原始电源计划？

我想出了这样的东西，但感觉 -and 语句不起作用，或者我做错了什么？

此时我得到以下信息：

$PowerSettingsorg = Get-WmiObject -Namespace root\cimv2\power -Class win32_powerplan
$PowerSettings = Get-WmiObject -Namespace root\cimv2\power -Class win32_powerplan


If ($PowerSettings.IsActive -eq $True -And $PowerSettings.ElementName -eq 'Hoge prestaties') 
{ 
write-host "++ Power Plan Settings are correct.!" 
}

Else {
$hpPlan = Get-WmiObject -Namespace root\cimv2\power -Class win32_powerplan | Where-Object { $_.ElementName -eq 'Hoge prestaties' } 
$hpPlan.Activate()
write-host "++ Power plan Settings are changed to High Performance.!"
}

<Long Script here>


If ($PowerSettingsorg.IsActive -eq 'true' -and $PowerSettingsorg.ElementName -eq 'Gebalanceerd')
{
$orgPlan = Get-WmiObject -Namespace root\cimv2\power -Class win32_powerplan | Where-Object { $_.ElementName -eq 'Gebalanceerd' } 
$orgPlan.Activate()
write-host "++ Power plan Settings have been reverted to Belanced.!"
}
Else {
write-host "++ No Power Plan settings have been reverted.!"
}

Answer 1

在 Windows 10 中，COM 对象上的

Activate()

方法不再起作用，会给您错误消息

Exception calling "Activate" : "This method is not implemented in any class "

。

要操纵电源方案设置，您必须使用

PowerCfg.exe

：

# fill a hashtable with power scheme guids and alias names:

# Name                                   Value
# -----                                  -----
# 381b4222-f694-41f0-9685-ff5bb260df2e   SCHEME_BALANCED  # --> Balanced
# 8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c   SCHEME_MIN       # --> High performance
# a1841308-3541-4fab-bc81-f71556f20b4a   SCHEME_MAX       # --> Power saver

$powerConstants = @{}
PowerCfg.exe -ALIASES | Where-Object { $_ -match 'SCHEME_' } | ForEach-Object {
    $guid,$alias = ($_ -split '\s+', 2).Trim()
    $powerConstants[$guid] = $alias
}

# get a list of power schemes
$powerSchemes = PowerCfg.exe -LIST | Where-Object { $_ -match '^Power Scheme' } | ForEach-Object {
    $guid = $_ -replace '.*GUID:\s*([-a-f0-9]+).*', '$1'
    [PsCustomObject]@{
        Name     = $_.Trim("* ") -replace '.*\(([^)]+)\)$', '$1'          # LOCALIZED !
        Alias    = $powerConstants[$guid]
        Guid     = $guid
        IsActive = $_ -match '\*$'
    }
}

# set a variable for the desired power scheme (in this case High performance)
$desiredScheme = $powerSchemes | Where-Object { $_.Alias -eq 'SCHEME_MIN' }

# get the currently active scheme
$PowerSettingsorg = $powerSchemes | Where-Object { $_.IsActive }

if ($PowerSettingsorg.Alias -eq $desiredScheme.Alias) {
    # or by guid:   if ($PowerSettingsorg.Guid -eq $desiredScheme.Guid)
    # or localized: if ($PowerSettingsorg.Name -eq $desiredScheme.Name)
    # or:           if ($desiredScheme.IsActive)
    Write-Host "++ Power Plan Settings are correct.! ($($PowerSettingsorg.Name))"
}
else {
    # set powersettings to High Performance
    Powercfg.exe -SETACTIVE $desiredScheme.Alias  # you can also set this using the $desiredScheme.Guid
    # test if the setting has changed
    $currentPowerGuid = (Powercfg.exe -GETACTIVESCHEME) -replace '.*GUID:\s*([-a-f0-9]+).*', '$1'
    if ($currentPowerGuid -eq $desiredScheme.Guid) {
        Write-Host "++ Power plan Settings have changed to $($desiredScheme.Name).!"
    }
    else {
        # exit the script here???
        Throw "++ Power plan Settings did not change to $($desiredScheme.Name).!"
    }
}

### <Long Script here> ###


# get the current power scheme and test if it needs to be reverted
if ($currentPowerGuid -ne $PowerSettingsorg.Guid) {
    # set powersettings to the original scheme
    Powercfg.exe -SETACTIVE $PowerSettingsorg.Alias  # you can also set this using the $PowerSettingsorg.Guid
    # test if the setting has changed
    $currentPowerGuid = (Powercfg.exe -GETACTIVESCHEME) -replace '.*GUID:\s*([-a-f0-9]+).*', '$1'
    if ($currentPowerGuid -eq $PowerSettingsorg.Guid) {
        Write-Host "++ Power plan Settings have been reverted to $($PowerSettingsorg.Name).!"
    }
    else {
        # exit the script here???
        Throw "++ Power plan Settings did not revert to $($PowerSettingsorg.Name).!"
    }
}
else {
    Write-Host "++ Power Plan settings did not need to be reverted.!"
}

Answer 2

所以这是我的修复，因为

.Activate()

方法在新版本的 PS 上神秘地消失了：

使用激活方法和 CIM 的旧方法

$p = Get-CimInstance -Name root\cimv2\power -Class win32_PowerPlan -Filter "ElementName = 'High Performance'"      
Invoke-CimMethod -InputObject $p -MethodName Activate

使用 powercfg 现在设置所选计划的新方法

$p = Get-CimInstance -Name root\cimv2\power -Class win32_PowerPlan -Filter "ElementName = 'High Performance'"      
powercfg /setactive ([string]$p.InstanceID).Replace("Microsoft:PowerPlan\{","").Replace("}","")

Answer 3

您的 $PowerSettings 变量包含所有三个电源计划的设置。您需要测试看看哪个计划处于活动状态。

$PowerSettings = Get-WmiObject -Namespace root\cimv2\power -Class win32_powerplan
($PowerSettings | Where-Object { $_.IsActive }).ElementName

Answer 4

您可以通过以下命令查看 Windows 中所有电源计划的列表：

powercfg -l

设置您想要的电源计划，在本例中我选择了高性能计划：

powercfg -s 8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c
powercfg -l