Here's a tip from my colleague Ed Wilson (the Microsoft Scripting Guy) about how to use PowerShell to find network adapter power management configuration.
Question: You want to find information about the status of network adapter power management configuration on your local network adapter. How can you do this?
Answer: On your Windows 8.1 computer running Windows PowerShell 4.0 use the command that appears here (if you have an Intel type of network adapter).
Get-NetAdapterPowerManagement -InterfaceDescription "*intel*"
Mitch Tulloch is a nine-time recipient of the Microsoft Most Valuable Professional (MVP) award and a widely recognized expert on Windows administration, deployment and virtualization. For more information see http://www.mtit.com.
Ed Wilson is the bestselling author of eight books about Windows Scripting, including Windows PowerShell 3.0 Step by Step, and Windows PowerShell 3.0 First Steps. He writes a daily blog about Windows PowerShell call Hey, Scripting Guy! that is hosted on the Microsoft TechNet Script Center; for more PowerTips check out the Hey, Scripting Guy! blog.