Stream-flow Capacity Shaved Energy Distribution in Hydroelectric Power Systems

The seasonal flow distribution into a hydroelectric system is analyzed, without considering reservoirs, in terms of time series for lateral energy inflows and internal flows at generating facilities. Key concepts, such as regulated and unregulated flow are defined and illustrated, in addition to peak shaving energy inputs based on station installed capacities. Therefore spilled energy is compared to usable energy, considering the installed capacities and the resulting time series are analyzed and illustrated graphically. We are primarily interested in the temporal distribution and variations, without considering the impact of any seasonal reservoirs to correct the discrepancies between inflow and outflow. Thus the shapes of the flow series, when aggregated for instance into regulated and unregulated flow is analyzed with a simple vector/matrix-based model. A case study based on conditions in the Icelandic hydro-based power system is also presented.