Hierarchical multi-reservoir optimization modeling for real-world complexity with application to the Three Gorges system. (July 2015)

• Record Type: Journal Article
• Authors: Li, Fang-Fang; Shoemaker, Christine A.; Qiu, Jun; Wei, Jia-Hua
• Is Part Of: Environmental modelling & software. Volume 69(2015:Jul.)
• Page Start: 319
• Page End: 329
• Publication Date: 2015-07
• Subjects: Hierarchical optimization -- Heterogeneous hydropower units -- Multi-reservoirs -- Heuristic algorithms -- The Three Gorges Project; Environmental monitoring -- Computer programs -- Periodicals; Ecology -- Computer simulation -- Periodicals; Digital computer simulation -- Periodicals; Computer software -- Periodicals; Environmental Monitoring -- Periodicals; Computer Simulation -- Periodicals; Environnement -- Surveillance -- Logiciels -- Périodiques; Écologie -- Simulation, Méthodes de -- Périodiques; Simulation par ordinateur -- Périodiques; Logiciels -- Périodiques; Computer software; Digital computer simulation; Ecology -- Computer simulation; Environmental monitoring -- Computer programs; Periodicals; Electronic journals; 363.70015118
• DOI: 10.1016/j.envsoft.2014.11.030
• Languages: English
• ISSNs: 1364-8152

Abstract

Abstract: High dimensionality in real-world multi-reservoir systems greatly hinders the application and popularity of evolutionary algorithms, especially for systems with heterogeneous units. An efficient hierarchical optimization framework is presented for search space reduction, determining the best water distributions, not only between cascade reservoirs, but also among different types of hydropower units. The framework is applied to the Three Gorges Project (TGP) system and the results demonstrate that the difficulties of multi-reservoir optimization caused by high dimensionality can be effectively solved by the proposed hierarchical method. For the day studied, power output could be increased by 6.79 GWh using an optimal decision with the same amount of water actually used; while the same amount of power could be generated with 2.59 × 10 7 m 3 less water compared to the historical policy. The methodology proposed is general in that it can be used for other reservoir systems and other types of heterogeneous unit generators.