A framework for analysing the variability of power from spatially distributed solar PV generators

In recent years, solar photovoltaic generators (SPVGs) have become a significant source of generation. These SPVGs are spatially distributed across the power system network (PSN) at multiple locations. The power from spatially distributed SPVGs exhibits spatial and temporal variability (SaTV) due to the solar resource variability over spatial and temporal scales. The SaTV of power from spatially distributed SPVGs poses several challenges during power system planning and operation. Therefore, this paper proposes a framework with three metrics for analyzing the SaTV of power from spatially distributed SPVGs in the PSN. To show the usefulness of the proposed framework, the SaTV of power from several scenarios of spatially distributed SPVGs in the IEEE 30 and 118 bus test systems is investigated. Further, the proposed framework is also used to analyze the spatial and temporal fluctuations of power from spatially distributed SPVGs. The results show that the SaTV of power depends on the i) spatial distribution, ii) capacity allocation, and iii) placement of SPVGs. Hence, the proposed framework will be helpful in power system planning during optimal placement and sizing of SPVGs, and analyzing the impact of SaTV during operation.