Formulation and Implementation of Short-Term Optimal Reservoir Operation Schemes Integrated with Operation Rules

Zhang, Yanke; Wu, Jing; Yu, Hongjie; Ji, Changming

doi:10.3390/w11050944

Cited by 6 publications

(3 citation statements)

References 16 publications

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“…Considering space and time inflow correlations [21,40], the recursive function can be transformed into Equations ( 6) and (7).…”

Section: Mldc Model Based On Rcdpmentioning

confidence: 99%

“…Methods including linear programming (LP), dynamic programming (DP), nonlinear programming (NLP), and simulation have been used in the optimization of reservoir operations [2][3][4]. The operation of hydropower reservoirs needs to follow energy generation rules [5][6][7] to increase benefit, and must consider the criteria of reliability, resiliency, and vulnerability [8]. In a centralized operated power system with no timevarying energy price, the economic benefit is often evaluated using the amount of energy generation, and bounds on power generation and reservoir release are set to be constraints.…”

Section: Introductionmentioning

confidence: 99%

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Multi-Level Dependent-Chance Model for Hydropower Reservoir Operations

Cheng

Zhao

et al. 2022

Energies

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Some hydropower reservoirs are operated under different constraint levels. For these reservoirs, a multi-level (ML) dependent-chance (DC) model is established. In the model, only when the higher-level constraints are satisfied are the lower-level constraints or system benefits considered. The multi-level dependent-chance (MLDC) model is specified by two models. One is based on existing reliability-constrained (RC) dynamic programming (DP), in which the soft constraints are addressed using reliability constraints of 1, and the priorities are reflected using the order of magnitudes of Lagrange multipliers. The other is the explicit dependent-chance reasoning in the DP recursive function, in which each soft constraint is represented as an objective function of negative expected failure time and the optimum is the solution with a larger value for all higher-level objective functions. The proposed models are applied to derive long-term operation rules for the hydropower system on the middle-lower Lancang River. The results show the feasibility and performances of the explicit graded constraint control of the proposed model and the solution methods.

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“…Considering space and time inflow correlations [21,40], the recursive function can be transformed into Equations ( 6) and (7).…”

Section: Mldc Model Based On Rcdpmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-Level Dependent-Chance Model for Hydropower Reservoir Operations

Cheng

Zhao

et al. 2022

Energies

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show abstract

“…The short-term optimal operation models were established coupling with the FWFHM (Scheme 1) and the DWFHM (Scheme 3), and the models were solved by IPOA to obtain operation schemes. Meanwhile, the scheme coupling with the FWFHM was replaced by the DWFHM to form Scheme 2, which was implemented in accordance with the water level control mode to obtain the actual operation results [29].The accuracy of IPOA in different schemes was set as 0.0001. The opeartion results are shown in Table 2, Table 3, and Figures 8-13.…”

Section: Case Studymentioning

confidence: 99%

Short-Term Optimal Operation of Cascade Reservoirs Considering Dynamic Water Flow Hysteresis

Zhang

Liu

et al. 2019

Water

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In making short-term optimal operation schemes of cascade reservoirs, water flow hysteresis between the upper reservoir and the lower reservoir is often considered as constant, which cannot really reflect the hysteresis variation between different water flows and will lead to losses of the optimal operation scheme’s benefit. To depict the water flow hysteresis, a Dynamic Water Flow Hysteresis Method (DWFHM) is proposed, based on the space mapping principle. With the mapping operator in the DWFHM, the lower reservoir inflow can be directly obtained. Besides, the DWFHM is used to deal with the hydraulic relation constraint in the short-term optimal operation model of cascade reservoirs. Then, the improved model is applied to the Jinguan cascade reservoirs in the Yalong River basin and solved by an Improved Progressive Optimal Algorithm (IPOA). The results are as follows. (1) Compared with the traditional Fixed Water Flow Hysteresis Method (FWFHM), the inflow processes of the lower reservoir obtained by the DWFHM are more in line with the actual values, due to full consideration of the attenuation effect. (2) The optimal operation with the DWFHM can effectively increase the generated energy (2827 MW·h and 504 MW·h in the non-flood season and the flood season, respectively). Through the analysis of this case, the DWFHM developed in this study can effectively improve the practicability of the optimal operation scheme and reduce the risk in the operation of cascade reservoirs.

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Future hydrological drought changes over the upper Yellow River basin: The role of climate change, land cover change and reservoir operation

Yuan

Jiao

2023

Journal of Hydrology

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Formulation and Implementation of Short-Term Optimal Reservoir Operation Schemes Integrated with Operation Rules

Cited by 6 publications

References 16 publications

Multi-Level Dependent-Chance Model for Hydropower Reservoir Operations

Multi-Level Dependent-Chance Model for Hydropower Reservoir Operations

Short-Term Optimal Operation of Cascade Reservoirs Considering Dynamic Water Flow Hysteresis

Future hydrological drought changes over the upper Yellow River basin: The role of climate change, land cover change and reservoir operation

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