Future power systems will contain a considerable portion of distributed energy resources. To accommodate this, well established requirements are applied both at the system development and operation stages. One of the main requirements is the existence of a dynamic stability reserve that is capable of providing sufficient support to the system during transients. However, the future dynamic characteristics of power systems are unknown and in this respect appropriate modelling and uncertainty handling techniques are required. To provide this, automation procedures have been developed to estimate future stability reserves for the systems under consideration.