FPGA based co-ordinated controller for hybrid power systems

Hierarchical power systems are experiencing a paradigm shift into deregulated systems. As a result many small generators are being connected at the distribution level, in order to supply a reliable and sustainable power to select customers. These generators transform the distribution systems into micro-grids which would work either in autonomous or non-autonomous modes. It becomes mandatory to connect renewable and dispatchable sources in case of a hybrid power system for supplying the connected loads without intermittency. This paper aims at analyzing the performance of one such autonomous hybrid system for varying demands. PV and battery based back up source are considered to be present in the system under consideration. An FPGA based overall coordinated controller has been developed to ensure power sharing among the different sources used in the hybrid system also incorporating variations in the solar irradiations.