Ecological Optimal Operation of Hydropower Stations to Maximize Total Phosphorus Export

2020 ◽  
Vol 146 (9) ◽  
pp. 04020075
Author(s):  
Jiahui Deng ◽  
Yu Li ◽  
Bo Xu ◽  
Wei Ding ◽  
Huicheng Zhou ◽  
...  
Keyword(s):  
Total Phosphorus ◽  
Optimal Operation ◽  
Hydropower Stations ◽  
Phosphorus Export

scholarly journals An Improved Slime Mold Algorithm and its Application for Optimal Operation of Cascade Hydropower Stations

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 226754-226772
Author(s):  
Trong-The Nguyen ◽  
Hong-Jiang Wang ◽  
Thi-Kien Dao ◽  
Jeng-Shyang Pan ◽  
Jian-Hua Liu ◽  
...  
Keyword(s):  
Optimal Operation ◽  
Slime Mold ◽  
Cascade Hydropower Stations ◽  
Hydropower Stations

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

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.

Total phosphorus export from Iowa agricultural watersheds: Quantifying the scope and scale of a regional condition

2020 ◽  
Vol 581 ◽  
pp. 124397 ◽  
Author(s):  
Keith E. Schilling ◽  
Matthew T. Streeter ◽  
Anthony Seeman ◽  
Christopher S. Jones ◽  
Calvin F. Wolter
Keyword(s):  
Total Phosphorus ◽  
Agricultural Watersheds ◽  
Phosphorus Export ◽  
Regional Condition

Modelling sediment and total phosphorus export from a lowland catchment: comparing sediment routing methods

2014 ◽  
Vol 29 (2) ◽  
pp. 280-294 ◽  
Author(s):  
Shenglan Lu ◽  
Brian Kronvang ◽  
Joachim Audet ◽  
Dennis Trolle ◽  
Hans Estrup Andersen ◽  
...  
Keyword(s):  
Total Phosphorus ◽  
Sediment Routing ◽  
Routing Methods ◽  
Phosphorus Export

The Research on Cascade Reservoirs Optimal Operation Coupling with Latin Hypercube Random Simulation Method

2011 ◽  
Vol 347-353 ◽  
pp. 1383-1386 ◽  
Author(s):  
Ran Zhou ◽  
Kan Yang ◽  
Yong Huai Hao ◽  
Jiao Zheng ◽  
Guo Shuai Liu
Keyword(s):  
Large Scale ◽  
Latin Hypercube Sampling ◽  
Simulation Method ◽  
Optimal Operation ◽  
Linear Regression Method ◽  
Latin Hypercube ◽  
System Decomposition ◽  
Cascade Reservoirs ◽  
Random Simulation ◽  
Hydropower Stations

In this paper, linear regression method is used to deal with the flow transmission. Applying large -scale system decomposition-coordination method, the paper analyzes the optimal operation problem of cascade hydropower stations. In order to research the uncertainty of the optimal operation of cascade reservoirs, this paper presents a method which combines it with the random simulation, which uses the method of Latin hypercube sampling to improve Monte Carlo method. The study case of Three Gorges cascade reservoirs shows that the method is practical

Trend Analysis on the Flow Alteration in the Nature Reserve, Upstream of Yangtze River

2014 ◽  
Vol 641-642 ◽  
pp. 132-136 ◽  
Author(s):  
Chen Shen ◽  
Lei Hua Dong ◽  
Yi Cheng Wang ◽  
Shun Xin Feng ◽  
Ying Wang
Keyword(s):  
Flow Regime ◽  
Aquatic Ecosystems ◽  
Yangtze River ◽  
Nature Reserve ◽  
Annual Runoff ◽  
Optimal Operation ◽  
Hydrologic Alteration ◽  
Flood Peak ◽  
Flow Alteration ◽  
Hydropower Stations

National Nature Reserve for the Rare and Endemic Fishes in the Upper Reaches of the Yangtze River (RURYR) in China has been established to protect the extraordinarily perfect aquatic ecosystem since 2005. However, four cascade hydropower stations located in the upstream of RURYR will impound and generate electricity gradually, which may change the natural flow regime there. Since flow regime is of great importance to maintaining the healthy and integrity of aquatic ecosystems, it is essential to study the rules of its variation. The flow alteration in RURYR was characterized by Indicators of Hydrologic Alteration (IHA) during 1960-2010, and its trends and the change rules were analyzed for further study on environmental flow and multi-objective optimal operation. The results indicate that in terms of almost no change in total annual runoff, the flow shows a decreasing trend in the flood season, especially in August and October, but an increasing trend in the dry season (from January to June). The variation trend seems reduce the flood risk as a good purpose, however, along with the multi-operation of the cascade reservoirs, the loss of flood peak will increase more significantly, which is harmful to the aquatic ecosystems.

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

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 944 ◽  
Author(s):  
Yanke Zhang ◽  
Jiajie Wu ◽  
Hongjie Yu ◽  
Changming Ji
Keyword(s):  
Evaluation Method ◽  
Optimal Operation ◽  
Operating Conditions ◽  
Control Mode ◽  
Theoretical Research ◽  
Short Term ◽  
Post Evaluation ◽  
Operation Rules ◽  
Actual Operation ◽  
Hydropower Stations

To narrow the gap between theoretical research and practical application of short-term optimal reservoir power generation operation under uncertain conditions, a comprehensive study is conducted on the formulation, evaluation, and implementation of operation schemes throughout the entire procedure of optimal operation. Firstly, the three implementation modes of the optimal operation scheme are assessed with the post-evaluation method. After the optimal implementation mode is determined, the formulation and implementation of optimal operation schemes are improved by combining the advantages of conventional and optimal operation and using the concept of warning water level in operation rules. Finally, the Xiaoxuan Reservoir is taken as an example for simulation calculation under different operating conditions. The results show that the operation model integrated with operation rules has both the security of conventional operation and the profitability of optimal operation. The accordingly-formulated optimal operation schemes, when implemented with the output control mode, can provide valuable guidance for the actual operation of hydropower stations.

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