Multicommodity long-term hydrogeneration optimization with capacity and energy constraints

The work presented deals with long-term hydrogeneration optimization in integrated systems when there are no limitations on the availability of fuels for thermal units. A multicommondity network model represents hydrovariables. Hydrogeneration and its unavailability distribution is modeled as a multiblock distribution and a procedure is derived to convolve the hydropower unavailability distribution with the load duration curve. A suitable approximation of the expected production cost is minimized subject to multicommodity network constraints and to hydropower capacity and hydroenergy limit nonlinear constraints. It can be applied to systems with hydrogeneration regardless of its proportion of hydrothermal mix. A realistic case example is solved and the results are discussed. Simulation tests performed with many inflow sequences validate the results obtained.