The remote Hyper-V server should have WMI Remote Administration enabled (see below).
Suppose you have two machine - one with Windows 7, and another with Windows Server 20008 R2 and Hyper-V installed and some VMs running. Here are basic steps that you need to follow:
Install PSHyperV library on the Windows 7 machine.
Enable WMI remote administration on Windows Sever 2008 R2 machine by running the following command from CMD console:
netsh firewall set service type=RemoteAdmin profile=all
Now on your Windows 7 machine run PowerShell console elevated (as Administrator), load HyperV module and execute Get-VM command against the remote server:
PS C:\Windows\system32> Import-Module D:\hyperv\HyperV.psd1
PS C:\Windows\system32> get-vm -server Server-01
Host VMElementName State
Up-Time (mS) Owner
-------- ------------- ----- ------------
Server-01 Win-RQ539 Running 1048716623
Server-01 WIN-MU733 Running 74205949
Server-01 vm1 Running
Note that another link you referring to,
http://technet.microsoft.com/en-us/library/hh848559.aspx, is for a different PowerShell Hyper-V management module, the one that ships with Windows Server 2012. Windows Server 2012 has WMI remote management enabled by default so the remote Hyper-V management
commands from either built-in module or the module from this project should just work.