Active grid integration of distributed generation utilizing existing infrastructure more efficiently - an Austrian case study

This paper presents the technical and economical results for an Austrian case study for grid integration of distributed generation (DG). The current state of the grid segment is shown and its inability to host higher than present amounts of DG is discussed. Consequently, technical solutions to overcome this problem without reinforcing the grid are presented. Different strategies of active voltage control are studied on the basis of extensive simulations using the DIgSILENT PowerFactoryreg software. Detailed economic analyses for different grid segments as well as producer-driven strategies (e.g. local or coordinated voltage control) for voltage control are performed. These approaches are furthermore compared to conventional grid reinforcement measures, showing that investments in new smart grid technologies may even lead to lower overall cost for society.