Soft synchronization of dispersed generators to micro grids for smart grid applications

Fast and proper synchronization of generation stations is becoming inevitable specially in micro grids. Increased number of small generation units raised total quantity of their synchronization process to the micro grids. This Paper provides improvements in synchronization between an emulated power system and its power generation stations in a laboratory scaled power grid. Three methods including duty cycled control of torque controlled prime movers, with and without local load at generator terminal, and implementation of a dynamic load brake controller have been discussed for providing the proper conditions for synchronization. Finally experimental results for such methods in a real time power system test bed have been compared.