I just added new domain controllers (2012 R2) to my domain.

And was looking for powershell options to migrate my FSMO roles.
Well here it is!

#Registering the Schema Tool 
regsvr32 schmmgmt.dll 

#Check AD FSMO roles
netdom Query fsmo 

Move-ADDirectoryServerOperationMasterRole -Identity "NEW-DC" -OperationMasterRole PDCEmulator,RIDMaster,InfrastructureMaster,SchemaMaster,DomainNamingMaster 
<# 
PDCEmulator or 0 
RIDMaster or 1 
InfrastructureMaster or 2 
SchemaMaster or 3 
DomainNamingMaster or 4 
#> 
#check AD FSMO roles result: netdom Query fsmo

Update:
Perhaps you will receive the following error:
Move-ADDirectoryServerOperationMasterRole : Access is denied
At line:1 char:42
+ Move-ADDirectoryServerOperationMasterRole <<<<  -Identity “DC02” -OperationMa
sterRole PDCEmulator,RIDMaster,InfrastructureMaster,SchemaMaster,DomainNamingMa
ster
    + CategoryInfo          : NotSpecified: (Microsoft.Activ…DirectoryServer
   :ADDirectoryServer) [Move-ADDirector…ationMasterRole], ADException
    + FullyQualifiedErrorId : Access is denied,Microsoft.ActiveDirectory.Manag
   ement.Commands.MoveADDirectoryServerOperationMasterRole

Your user does not have the correct permissions. Your user must be Enterprise Admin of be a member of the Schema admin group.