For instructions on how to connect to VMware PowerCLI, Follow the post here:
Run the below to get the list of orphaned VM
$allVMs=Get-VM
foreach ($vm in $allVMs) {
if ($vm.ExtensionData.Runtime.ConnectionState -eq "orphaned") {$vm.name}
}
Run the below to remove orphaned VM
foreach ($vm in $allVMs) {
if ($vm.ExtensionData.Runtime.ConnectionState -eq "orphaned") {$vm | Remove-VM}
}