A novel cooperative multi-search benders decomposition for solving the hydrothermal unit-commitment problem

Hydrothermal Unit-Commitment Problem of a Large-Scale System with Representation of Forbidden Zones

“…However, for a better understanding of the differences between the aggregated model and the zone model, we chose to keep variables u. The following model, (14) and (15), is the equivalent forbidden-zone aware version of (1)-( 13).…”

“…In ( 14) and (15), different from (1)-( 13), the turbine discharge, and consequently the plant's power output, depends on the binary variables u. For this generic plant with a single group of identical units, there is one binary variable for each of its operating zones.…”

“…The works [10][11][12][13][14] all handle self-scheduling problems in which generation targets have already been set, for instance, by the system operator, the generating units must be scheduled and dispatched to satisfy them while optimizing an appropriate objective function. To the best of our knowledge, the only work addressing a large-scale centralized unit commitment problem with explicit representation of forbidden zones is [15]. However, ref.…”

“…[15] is focused mainly on the development of the methodology used for solving the HTUC. The state-of-the-art for cost-based centralized dispatch of large-scale hydrothermal systems before [9,15], applied unit aggregation to the hydro generating units and subsequently neglected any integer decisions related to hydro generation. In contrast, ref.…”

“…Different from the studies found in the literature, we tackle a cost-based, centralized HTUC of a real, large-scale system. Moreover, in contrast to [15], here, we focus on analysing the operational benefits of considering an explicit representation of forbidden zones in a large-scale system. Our analysis provides insights into the importance of forbidden-zone representation.…”