Coupled Operating Rules for Optimal Operation of Multi-Reservoir Systems

Ashrafi, Seyed Mohammad; Dariane, Alireza B.

doi:10.1007/s11269-017-1762-y

Cited by 24 publications

(19 citation statements)

References 24 publications

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“…The optimal operation of a multi-reservoir system is complex owing to various variables and objectives [1]. A multi-reservoir system operation must be able to maximize or minimize the use of optimal policies for reservoir inflow, storage volume, and release management [2]. Generally, a reservoir is operated by using upper and lower rule curves to control the release of water to the demand sites downstream [3].…”

Section: Introductionmentioning

confidence: 99%

“…These problems have introduced difficulties and complexities in the operation of these reservoirs. Moreover, the operation of these reservoirs sometimes depends on the experience of their operators [19].…”

Section: Introductionmentioning

confidence: 99%

“…A multi-reservoir operation requires a balancing of all objectives of a reservoir, including hydropower generation, water supply, flood control, and environment flow [23]. In 2017, Ashrafi and Dariane found that the complexity of multi-reservoir operations prevents the application of simple optimization techniques [24].…”

Section: Introductionmentioning

confidence: 99%

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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2020

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“…Reservoir operating rules usually play an important role in guiding the reservoir storage and release to obtain the optimal benefit of water resources utilization (Oliveira and Loucks 1997;Sigvaldason 1976). However, determining the operating rules for a multi-reservoir system involves complex decision-making issues and it is extremely difficult to obtain appropriate operating rules for multi-reservoir systems (Ashrafi and Dariane 2017;Labadie 2004;Ostadrahimi et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Derivation of Hydropower Rules for Multireservoir Systems and Its Application for Optimal Reservoir Storage Allocation

Zhang

Liu

et al. 2019

J. Water Resour. Plann. Manage.

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Hydropower operating rules can guide the reservoir release and storage for maximizing the hydropower generation. However, the optimal hydropower operating rules are usually derived by numerical hydropower simulation methods. This study focuses on the analytical solution to optimal hydropower rules for storage allocation of a multireservoir system. An energy function, namely the E-function, is proposed to describe the objective of hydropower generation. The E-function for a multi-reservoir system can be represented as a function of two variables, i.e., the proportional coefficient (alpha, which represents the proportional relationship between any two reservoirs in a multireservoir system) and the total increment in storage. The alpha-discriminant deduced from the E-function is used to infer the optimal reservoir storage allocation for the maximum hydropower generation. With the Ankang-Danjiangkou Reservoirs as a case study, the E-function and the alpha-discriminant were compared with the numerical hydropower simulation. The results indicated that (1) the E-function can be used to estimate the hydropower generation for multi-reservoir systems with acceptable hydropower generation estimation errors between the analytical E-function and the numerical hydropower simulation; and (2) the optimal reservoir storage allocation can be explicitly obtained using the alpha-discriminant. These findings are helpful for understanding the allocation of reservoir storages in multi-reservoir systems.

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“…Jiang et al [30] proposed three key technologies in the drawing process and one key technology in the practical application of ESOC, several difficult problems in drawing and application of ESOC are solved, and realized the combined utilization of DCM and ESOC. Ashrafi and Dariane [31] proposed an effective improved Melody Search (IMeS) algorithm to achieve the optimal operating rules of multi-reservoir systems with local demands, and the efficiency of the optimization method was compared to the results achieved by other selected well-known heuristic search methods, and revealed that the proposed algorithm is more effective in finding precise solutions over a long-term period. Aimed at the defects of the conventional two-stage Progressive Optimality Algorithm (POA) in the optimization of ESOC, Jiang et al [32] proposed a new multi-stage POA optimization model which took the traditional reverse calculation result as the initial solution, and expanded the two-stage optimization mode of conventional POA to higher stages mode, and this research realized the effective optimization of ESOC by the improved POA.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Energy Storage Operation Chart of Cascade Reservoirs with Multi-Year Regulating Reservoir

et al. 2019

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In view of the problems that have not been solved or studied in the previous studies of cascade Energy Storage Operation Chart (ESOC), based on a brief description of the composition, principle, drawing methods, and simulation methods of ESOC, the following innovative work has been done in this paper. Firstly, considering the inconsistency of inflow frequency of upstream and downstream watershed in selecting the typical dry years, a novel optimization model for selecting the overall inflow process considering the integrity of watershed was proposed, which aimed at minimizing the sum of squares of inflow frequency differences. Secondly, aiming at the influence of output coefficients (including number and values) on the results of ESOC, this paper proposed a new method to construct the initial solution of output coefficients and established an optimization model of output coefficients based on progressive optimality algorithms. Thirdly, to the optimization of ESOC with multi-year regulating reservoir, a discrete optimization model of drawdown level was constructed based on the idea of ergodic optimization. On these bases, taking the seven reservoirs in the Yalong River basin of China as an example, the typical dry years considering the inflow frequency inconsistency, the optimal output coefficients of ESOC and the optimal end-of-year drawdown level of a multi-year regulating reservoir (Lianghekou) were obtained, and compared with the previous research results, the ESOC optimized in this paper can increase the total power generation of the cascade system by 9% under the condition that the guaranteed rate did not change much. Furthermore, the difference of the optimal end-of-year drawdown levels between the cascade joint operation and single reservoir operation was discussed for the Lianghekou reservoir at the end of the case study. The obtained results were of great significance for guiding the actual operation of cascade reservoirs.

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Coupled Operating Rules for Optimal Operation of Multi-Reservoir Systems

Cited by 24 publications

References 24 publications

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Derivation of Hydropower Rules for Multireservoir Systems and Its Application for Optimal Reservoir Storage Allocation

Optimization of Energy Storage Operation Chart of Cascade Reservoirs with Multi-Year Regulating Reservoir

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