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

Posted 2023-03-05

【中文标题】如何使用 Powershell 更改 Windows 10 中的电源计划并在长脚本后恢复为原始设置？

【英文标题】：How to change Power Plan in Windows 10 with Powershell and revert after long script to original settings?

【发布时间】：2020-04-08 16:27:17

【问题描述】：

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”（如果还没有的话），然后运行一个长的 PowerShell 脚本，然后在脚本之后，切换回原来的电源计划?

我想出了类似的方法，但感觉 -and 语句不起作用，还是我做错了什么？

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.!"

【问题讨论】：

尝试将 AND 比较器括起来：($PowerSettings.IsActive -And ($PowerSettings.ElementName -eq 'Hoge prestaties')

它一直说它是 $True，而我的 Powerplan 处于平衡状态：如果 ($PowerSettings.IsActive -And ($PowerSettings.ElementName -eq 'Hoge prestaties')) 我希望这是错误的://

对我来说很好。您确定 ElementName 使用的是区域语言吗？如果输入 $PowerSettings.ElementName 会得到什么？

- Gebalanceerd - Hoge prestaties - Energiebesparing 对我来说似乎是正确的？

【参考方案1】：

在 Windows 10 中，COM 对象上的 Activate() 方法不再起作用，并显示错误消息 Exception calling "Activate" : "This method is not implemented in any class "。

要操作电源方案设置，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.!"

【讨论】：

感谢朋友的评论。激活工作得很好:) 用上面的回复解决了。非常感谢！

@Dennis Activate() 在我的机器上不起作用（Windows 10 Pro 1909 build 18363.720）并给了我"This method is not implemented in any class " 错误。

【参考方案2】：

所以这是我的解决方法，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("","")

【参考方案3】：

您的 $PowerSettings 变量包含所有三个电源计划的设置。您需要测试以查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

【讨论】：

我在搜索对象时所做的事情：IsActive $true。 ($PowerSettings.IsActive -eq $true -And ($PowerSettings.ElementName -eq 'Hoge prestaties')) 然而，虽然平衡的 powerscheme 处于活动状态，但它给我的结果是真实的。从什么时候开始高性能与主动方案中的平衡相同？

你是对的！我编辑了支票，现在一切正常！