DECLARE @var sql_variant = N'.\dev2014';
EXEC SSISDB.catalog.set_object_parameter_value
@object_type = 30
, @parameter_name = N'CM.tempdb.ServerName'
, @object_name = N'mvp_PeterLarsson.dtsx'
, @folder_name = N'so'
, @project_name = N'so'
, @value_type = V
, @parameter_value = @var;
GO