Multiobjective direct policy search using physically based operating rules in multireservoir systems
Visualitza/Obre
10.1061/(ASCE)WR.1943-5452.0001159
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/190620
Tipus de documentArticle
Data publicació2020-04-01
Condicions d'accésAccés obert
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Abstract
This study explores the ways to introduce physical interpretability into the process of optimizing operating rules for multireservoir systems with multiple objectives. Prior studies applied the concept of direct policy search (DPS), in which the release policy is expressed as a set of parameterized functions (e.g., neural networks) that are optimized by simulating the performance of different parameter value combinations over a testing period. The problem with this approach is that the operators generally avoid adopting such artificial black-box functions for the direct real-time control of their systems, preferring simpler tools with a clear connection to the system physics. This study addresses this mismatch by replacing the black-box functions in DPS with physically based parameterized operating rules, for example by directly using target levels in dams as decision variables. This leads to results that are physically interpretable and may be more acceptable to operators. The methodology proposed in this work is applied to a network of five reservoirs and four power plants in the Nechi catchment in Colombia, with four interests involved: average energy generation, firm energy generation, flood hazard, and flow regime alteration. The release policy is expressed depending on only 12 parameters, which significantly reduces the computational complexity compared to existing approaches of multiobjective DPS. The resulting four-dimensional Pareto-approximate set offers a variety of operational strategies from which operators may choose one that corresponds best to their preferences. For demonstration purposes, one particular optimized policy is selected and its parameter values are analyzed to illustrate how the physically based operating rules can be directly interpreted by the operators.
Descripció
supplemental_data_wr.1943-5452.0001159_ritter.pdf (492 KB)
Localització
CitacióRitter, J. [et al.]. Multiobjective direct policy search using physically based operating rules in multireservoir systems. "Journal of water resources planning and management (ASCE)", 1 Abril 2020, vol. 146, núm. 4, p. 05020002:1-05020002:15.
ISSN0733-9496
Versió de l'editorhttps://ascelibrary.org/doi/abs/10.1061/(ASCE)WR.1943-5452.0001159
Altres identificadorshttps://arxiv.org/abs/2001.09926
Fitxers | Descripció | Mida | Format | Visualitza |
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Ritter-et-al_2020_MODPS.pdf | Postprint | 3,668Mb | Visualitza/Obre |