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

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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Considering Water Propagation impact in Short-Term Optimal Operation of Cascade Reservoirs Using Nested Progressive Optimality Algorithm

Journal of Hydrology ◽

10.1016/j.jhydrol.2021.126764 ◽

2021 ◽

pp. 126764

Author(s):

Chang-ming Ji ◽

Yuan Liu ◽

Yi Wang ◽

Yanke Zhang ◽

Yutao Xie

Keyword(s):

Optimal Operation ◽

Short Term ◽

Cascade Reservoirs ◽

Optimality Algorithm

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Short-term optimal operation of Three-gorge and Gezhouba cascade hydropower stations in non-flood season with operation rules from data mining

Energy Conversion and Management ◽

10.1016/j.enconman.2012.08.024 ◽

2013 ◽

Vol 65 ◽

pp. 616-627 ◽

Cited By ~ 56

Author(s):

Chao Ma ◽

Jijian Lian ◽

Junna Wang

Keyword(s):

Data Mining ◽

Optimal Operation ◽

Short Term ◽

Flood Season ◽

Operation Rules ◽

Cascade Hydropower Stations ◽

Hydropower Stations

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Multi-Stage Dynamic Programming Method for Short-Term Cascade Reservoirs Optimal Operation with Flow Attenuation

Water Resources Management ◽

10.1007/s11269-017-1766-7 ◽

2017 ◽

Vol 31 (14) ◽

pp. 4571-4586 ◽

Cited By ~ 5

Author(s):

Changming Ji ◽

Chuangang Li ◽

Boquan Wang ◽

Minghao Liu ◽

Liping Wang

Keyword(s):

Dynamic Programming ◽

Optimal Operation ◽

Programming Method ◽

Dynamic Programming Method ◽

Short Term ◽

Cascade Reservoirs ◽

Multi Stage ◽

Flow Attenuation

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Research on Cascade Reservoirs’ Short-Term Optimal Operation under the Effect of Reverse Regulation

Water ◽

10.3390/w10060808 ◽

2018 ◽

Vol 10 (6) ◽

pp. 808 ◽

Cited By ~ 9

Author(s):

Changming Ji ◽

Hongjie Yu ◽

Jiajie Wu ◽

Xiaoran Yan ◽

Rui Li

Keyword(s):

Optimal Operation ◽

Short Term ◽

Cascade Reservoirs

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An Improved Model for Short-Term Traffic Forecasting Considering Weather Impacts

CICTP 2017 ◽

10.1061/9780784480915.080 ◽

2018 ◽

Author(s):

Xinchao Chen ◽

Si Qin ◽

Jian Zhang ◽

Huachun Tan ◽

Yunxia Xu ◽

...

Keyword(s):

Short Term ◽

Traffic Forecasting ◽

Improved Model ◽

Weather Impacts

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Optimal Operation of Floodwater Resources Utilization of Lakes in South-to-North Water Transfer Eastern Route Project

Sustainability ◽

10.3390/su13094857 ◽

2021 ◽

Vol 13 (9) ◽

pp. 4857

Author(s):

Zitong Yang ◽

Xianfeng Huang ◽

Jiao Liu ◽

Guohua Fang

Keyword(s):

Water Level ◽

Resource Utilization ◽

Flood Control ◽

Optimal Operation ◽

Water Transfer ◽

Water Levels ◽

Reservoir Storage ◽

Flood Season ◽

Hongze Lake ◽

North Water

In order to meet the demand of emergency water supply in the northern region without affecting normal water transfer, considering the use of the existing South-to-North Water Transfer eastern route project to explore the potential of floodwater resource utilization in the flood season of Hongze Lake and Luoma Lake in Jiangsu Province, this paper carried out relevant optimal operating research. First, the hydraulic linkages between the lakes were generalized, then the water resources allocation mode and the scale of existing projects were clarified. After that, the actual available amount of flood resources in the lakes was evaluated. The average annual available floodwater resources in 2003–2017 was 1.49 billion m3, and the maximum available capacity was 30.84 billion m3. Then, using the floodwater resource utilization method of multi period flood limited water levels, the research period was divided into the main flood season (15 July to 15 August) and the later flood season (16 August to 10 September, 11 September to 30 September) by the Systematic Clustering Analysis method. After the flood control calculation, the limited water level of Hongze Lake in the later flood season can be raised from 12.5 m to 13.0 m, and the capacity of reservoir storage can increase to 696 million m3. The limited water level of Luoma Lake can be raised from 22.5 m to 23.0 m (16 August to 10 September), 23.5 m (11 September to 30 September), and the capacity of reservoir storage can increase from 150 to 300 million m3. Finally, establishing the floodwater resource optimization model of the lake group with the goals of maximizing the floodwater transfer amount and minimizing the flood control risk rate, the optimal water allocation scheme is obtained through the optimization algorithm.

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Three Gorges Cascade Hydropower System Joint Simulative Optimal Operation Research in Power Market

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.347-353.1370 ◽

2011 ◽

Vol 347-353 ◽

pp. 1370-1373

Author(s):

Jiao Zheng ◽

Kan Yang ◽

Ran Zhou ◽

Yong Huai Hao ◽

Guo Shuai Liu

Keyword(s):

Power Market ◽

Optimal Operation ◽

Adaptive Genetic Algorithm ◽

Three Gorges ◽

Short Term ◽

Roulette Wheel Selection ◽

Generation Scheduling ◽

Hydropower System ◽

Selection Operator ◽

Hydropower Stations

The short-term joint optimal operation simulation of Three Gorges cascade hydropower system aiming at maximum power generation benefit is proposed. And a new method for optimizing cascade hydropower station based on Adaptive Genetic Algorithm (AGA) with trigonometric selective operators is presented. In this paper, the practical optimal operation in power market is described. The temporal-spatial variation of flow between cascade hydropower stations is considered, and time of use (TOU) power price is also taken into account. Moreover, a contrast between Tangent-roulette selection operator and traditional one is made. To a certain degree, the results of simulative optimal operation based on several representative hydrographs show that Tangent-roulette wheel selection operator can find a more excellent solution, because the Tangent-roulette one can overcome the fitness requirements of non-negative. The research achievements also have an important reference for the compilation of daily generation scheduling of Three Gorges cascade hydropower system in the environment of power market.

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