The present disclosure provides a method for obtaining site data from a power plant within a private network of the power plant, where the power plant comprises one or more wind turbine generators. The method comprises a step of providing at an internal computer system placed internally with respect to the private network site data relating to the power plant, where the site data is in a site data format. The site date is stored in the internal computer system, and pushes to an external data interface outside the private network. The site data is transformed to a universal data format being different from the site data format before or after pushing the site data.