Power Sharing in Multiple PV-Battery Based MG System by Considering Component Isolation

Increasing renewable energy resources contribution helps to reduce the ill effects of use of fossil fuels. Solar PV have highest percentage of use amongst all renewable as the solar insolation is available on earth in plentiful. Due to variability of power output, storage battery are also used along with PV resulting in PV-battery system within a microgrid (MG) system. Proper power sharing under failure of components under any faulty condition must be taken into account. The centralized secondary controller offers an accurate power sharing with the parallel attached PVB terminals through the low bandwidth communication channel/network. However, the performance of the system is significantly affected during the non-availability of the communication network. Therefore, the DSC algorithm needs to be updated to offer the stable operation of individual unit and overall microgrid for the duration in which the communication network is unavailable. Further, the isolation of the microgrid component(s) because of scheduled maintenance or the fault results in multiple separate networks/parts of the microgrid. Hence, the CDSC algorithm need to be upgraded to offer the stable and reliable operation of the newly formed networks/parts or nano-grids. Moreover, it offers proper power sharing among the available PVB units within the newly formed networks. The PSCAD/EMTDC tool is used to develop the simulation model of the modified EU distribution network for evaluating the system performance of the developed control scheme.