怎样通过PowerShell命令自动化调整Windows系统的电源计划模式？

# 使用WMI查询当前活动电源计划
$currentPlan = Get-WmiObject -Namespace root\cimv2\power -Class Win32_PowerPlan | 
              Where-Object {$_.IsActive} | 
              Select-Object ElementName

Write-Host "当前电源计划：" $currentPlan.ElementName

# 更简单的方法：使用powercfg命令
powercfg /getactivescheme

# 带格式输出所有电源计划
powercfg /list | ForEach-Object {
    if($_ -match '(^[a-fA-F0-9\-]+) (.+)$'){
        [PSCustomObject]@{
            GUID = $matches[1].Trim()
            Name = $matches[2].Trim()
        }
    }
}

GUID                                Name
----                                ----
381b4222-f694-41f0-9685-ff5bb260df2e  平衡
8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c  高性能
a1841308-3541-4fab-bc81-f71556f20b4a  节能

# 切换到高性能模式
$highPerfGUID = "8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c"
powercfg /setactive $highPerfGUID

# 验证切换结果
if((powercfg /getactivescheme) -match $highPerfGUID){
    Write-Host "已成功切换至高性能模式！" -ForegroundColor Green
} else {
    Write-Host "模式切换失败，请检查权限" -ForegroundColor Red
}

# 根据当前时间自动切换模式
$currentHour = (Get-Date).Hour

if($currentHour -ge 8 -and $currentHour -lt 18){
    # 工作时间使用平衡模式
    powercfg /setactive 381b4222-f694-41f0-9685-ff5bb260df2e
    Write-Host "已切换至办公模式" -ForegroundColor Cyan
}
elseif($currentHour -ge 18 -and $currentHour -lt 22){
    # 晚间娱乐时间
    powercfg /setactive 8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c
    Write-Host "已启用游戏模式" -ForegroundColor Yellow
}
else{
    # 夜间节能模式
    powercfg /setactive a1841308-3541-4fab-bc81-f71556f20b4a
    Write-Host "已进入夜间节能模式" -ForegroundColor Magenta
}

# 基于平衡模式创建新计划
$newPlanName = "我的游戏模式"
powercfg /duplicatescheme 381b4222-f694-41f0-9685-ff5bb260df2e
$newGUID = powercfg /list | 
          Select-String $newPlanName -Context 0,2 | 
          ForEach-Object { $_.Line.Split()[3] }

# 修改CPU最大频率
powercfg /setacvalueindex $newGUID SUB_PROCESSOR PROCTHROTTLEMAX 100
powercfg /setactive $newGUID

# 禁用USB选择性暂停（适合外接设备较多的场景）
powercfg /setacvalueindex $newGUID 2a737441-1930-4402-8d77-b2bebba343a7 ebddee6a-34ac-45e7-bcc8-76886c2a0813 0

# 进入维护模式前切换电源计划
function Enter-MaintenanceMode {
    # 备份当前计划
    $originalPlan = powercfg /getactivescheme
    
    # 切换至高性能模式
    powercfg /setactive 8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c
    
    # 禁用休眠
    powercfg /hibernate off
    
    # 执行维护任务...
    
    # 恢复原始设置
    powercfg /setactive $originalPlan
    powercfg /hibernate on
}

# 检测电源状态并自动优化
$powerStatus = Get-WmiObject -Class BatteryStatus -Namespace root\wmi

if($powerStatus.PowerOnline){
    # 接通电源时优化显示设置
    powercfg /setactive 8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c
    powercfg /setacvalueindex SCHEME_CURRENT 19cbb8fa-5279-450e-9fac-8a3d5fedd0c1 12bbed2e-4388-4ed1-b52b-9d6eb0ff7b7b 1
}
else{
    # 使用电池时降低屏幕亮度
    powercfg /setactive 381b4222-f694-41f0-9685-ff5bb260df2e
    powercfg /setdcvalueindex SCHEME_CURRENT 19cbb8fa-5279-450e-9fac-8a3d5fedd0c1 12bbed2e-4388-4ed1-b52b-9d6eb0ff7b7b 40
}

# 检查电源方案是否生效
Get-CimInstance -ClassName Win32_PowerPlan -Namespace root\cimv2\power | 
Format-Table ElementName, IsActive -AutoSize

# 重置电源计划到默认设置
powercfg /restoredefaultschemes

# 每天18:00自动切换模式
$action = New-ScheduledTaskAction -Execute 'powershell.exe' `
    -Argument '-WindowStyle Hidden -Command "powercfg /setactive 8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c"'

$trigger = New-ScheduledTaskTrigger -Daily -At 6pm

Register-ScheduledTask -Action $action -Trigger $trigger `
    -TaskName "晚间性能模式" -Description "每天18点自动切换电源计划"