Relevant bibliographies by topics / Cascaded hydropower

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  2. Dissertations / Theses
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Academic literature on the topic 'Cascaded hydropower'

Author: Grafiati
Published: 17 May 2025

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Journal articles on the topic "Cascaded hydropower"

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Xu, Zhanxing, Qiang Liu, Lingjun Xu, Li Mo, Yongchuan Zhang, and Xin Zhang. "Optimal Dispatching Rules for Peak Shaving of Cascaded Hydropower Stations in Response to Large-Scale New Energy Integration." Processes 13, no. 3 (February 21, 2025): 612. https://doi.org/10.3390/pr13030612.

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Fully tapping into the load regulation capacity of cascade hydropower stations on a river, in coordination with wind and photovoltaic power stations, can effectively suppress power fluctuations in new energy and promote grid integration and the consumption of new energy. To derive the peak shaving dispatching rules for cascaded hydropower stations in provincial power systems with a high proportion of new energy integration, a short-term peak shaving dispatching model for cascaded hydropower stations was first established considering large-scale new energy consumption; secondly, based on statistical learning methods, the peak shaving and dispatching rules of cascade hydropower stations in response to large-scale new energy integration were derived. Finally, taking wind farms, photovoltaic power stations, and the Qingjiang cascade hydropower stations in the power grid of Hubei Province, China, as research objects, the compensation effect of Qingjiang cascade hydropower stations on new energy output and the peak shaving performance for the power grid load were verified. The research results indicate that cascade hydropower can effectively reduce the peak valley load difference in provincial power grids and improve the overall smoothness of power grid loads while suppressing fluctuations in new energy output. After peak regulation by cascade hydropower, the residual load fluctuation indices of the power grid are improved by more than 20% compared to those after the integration of new energy. The probabilistic dispatching decisions for the facing period’s output through the optimal dispatching rules of cascade hydropower stations can provide dispatchers with richer decision-making support information and have guiding significance for the actual peak shaving dispatch of cascade hydropower stations.
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Wang, Xiang, Le Guo, Jianjian Shen, Meiyan Kong, and Xu Han. "Issues and Strategies for the Dispatching and Trading of the Three Gorges Large Hydropower System." Energies 16, no. 18 (September 18, 2023): 6683. http://dx.doi.org/10.3390/en16186683.

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China’s electricity market reform has posed a real challenge to the large-scale hydropower system. Taking the world’s largest watershed hydropower system, the Three Gorges large hydropower system (TGLHS), as the engineering background, this study analyzes the issues and strategies of dispatching and trading in the electricity market. The analysis indicates that the TGLHS exhibits unique difficulties because of transprovincial and transregional power transmission. Major issues including the multi-dimensional and multi-time-scale nested allocation of hydropower energy, the bidding and performance of cascaded hydropower plants in multiple electricity markets, as well as multiple uncertainties in the runoff; electricity prices in multiple markets are also elaborated upon. The corresponding suggested strategies are proposed to cope with the aforementioned issues: (1) for multi-dimensional and multi-scale nested allocation problems, it is necessary to comprehensively consider monthly market transactions and priority generation plans, and establish a profit maximization model; (2) propose a bidding decision-making linkage and segmented bidding optimization model for cascades upstream and downstream hydropower stations; (3) construct a model for decomposing the annual and monthly planned electricity consumption curves and developing operational plans for giant cascade power stations that are suitable for cross-provincial and cross-regional power transmission and transformation; (4) a runoff, electricity price, and market distribution model has been proposed, laying the foundation for further research on multi-scale optimization models for hydropower. Finally, prospects for research on the participation of large-scale hydropower systems in the electricity market are summarized, expecting to promote the marketization of large cascaded hydropower systems. The dispatching and trading of the TGLHS implies that it is important and necessary to explore market theories and methods considering hydropower characteristics and operation needs.
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Chen, Yang, Yong Zhao, and Jing Rui Zhang. "Analysis on Electricity Pricing Mechanism for Cascade Hydropower Stations in China." Applied Mechanics and Materials 94-96 (September 2011): 2200–2203. http://dx.doi.org/10.4028/www.scientific.net/amm.94-96.2200.

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For the large cascaded hydropower stations, an electricity pricing mechanism of cascade hydropower stations on large basins is proposed. The main idea is that the electricity generated by different hydropower stations on the same river can be sold to the Grid Corporation with the same price. Using five hydropower stations on the middle and lower reaches of some river in China's south-western region as a case, the pricing methods based on the Operation-period pricing method are studied. The changes of hydropower stations' earnings are analyzed through the cascade hydropower stations optimal scheduling model and simulation analysis. The results show that the mechanism is conducive to hydropower development and the comprehensive utilization of water resources, which provides an alternative of electricity market reform strategy for the national energy departments.
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Shao, Qizhuan, Mingbo Wang, and Shuangquan Liu. "A Two-stage Successive Approximation Method of Dynamic Programming for Operations of Cascaded Hydropower Plants with Navigation Demand." Journal of Physics: Conference Series 2224, no. 1 (April 1, 2022): 012136. http://dx.doi.org/10.1088/1742-6596/2224/1/012136.

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Abstract The operations of cascaded hydropower plants have always been recognized as a complex system optimization problem. The difficulty of modelling and optimization solution is further aggravated when comprehensive water demands for power generation, navigation and ecology are considered. This study develops an optimization model for operations of cascaded hydropower plants with navigation demands, and proposes a two-stage successive approximation method of dynamic programming. In the model, the navigation demand is considered as a constraint. The first stage is to optimize the operation of cascaded hydropower plants with no consideration of navigation demand. The optimized result is taken as an initial solution of the last stage. Moreover, the navigation constraint is introduced in the solution procedure to obtain a reasonable operation scheme. The method is implemented on operations of a cascaded hydropower plants with navigation task in Southwest China. The results show that the navigation demand can be satisfied by coordination of cascaded hydropower plants. Moreover, this constraint has an effect on the monthly distribution of total energy production during one year. In addition, the computing efficiency and solution accuracy are analysed by using different discrete steps.
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Wu, Zhong Qun. "How to Apply Dynamic Optimization into Intertemporal Investment." Applied Mechanics and Materials 63-64 (June 2011): 930–35. http://dx.doi.org/10.4028/www.scientific.net/amm.63-64.930.

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The most important feature of cascaded hydropower investment, intertemporal optimization, is neglected to some extent. This paper focuses on how to make an optimal decision on intertemporal investment based on the case of cascaded hydropower. I incorporated intertemporal investment and financing constraints in dynamic programming, and proposed a new objective function. As a result, an intertemporal optimal dynamic model is established. The model highlights the fundamental framework of dynamic programming on cascaded hydropower development. The framework is robustly suitable to improve investment efficiency with respect to intertemporal optimization.
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Liu, Shuangquan, Jingzhen Luo, Hui Chen, Youxiang Wang, Xiangyong Li, Jie Zhang, and Jinwen Wang. "Third-Monthly Hydropower Scheduling of Cascaded Reservoirs Using Successive Quadratic Programming in Trust Corridor." Water 15, no. 4 (February 11, 2023): 716. http://dx.doi.org/10.3390/w15040716.

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The third-monthly (about 10 days in a time-step) hydropower scheduling, typically a challenging nonlinear optimization, is one of the essential tasks in a power system with operational storage hydropower reservoirs. This work formulates the problem into quadratic programming (QP), which is solved successively, with the linearization updated on the nonlinear constraint of the firm hydropower yield from all the cascaded hydropower reservoirs. Notably, the generating discharge is linearly concaved with two planes, and the hydropower output is defined as a quadratic function of reservoir storage, release, and generating discharge. The application of the model and methods to four cascaded hydropower reservoirs on the Jinsha River reveals several things: the successive quadratic programming (SQP) presented in this work can derive results consistent with those by the dynamic programming (DP), typically with the difference in water level within 0.01m; it has fast convergence and computational time increasing linearly as the number of reservoirs increases, with the most significant improvement in the objective at the second iteration by about 20%; and it is capable of coordinating the cascaded reservoir very well to sequentially maximize the firm hydropower yield and the total hydropower production.
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Zheng, Hao, Xuhan Luo, and Jinwen Wang. "A monthly hydropower scheduling of cascaded reservoirs based on a three-triangle linear concaving method." Journal of Physics: Conference Series 2306, no. 1 (November 1, 2022): 012010. http://dx.doi.org/10.1088/1742-6596/2306/1/012010.

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Abstract Hydropower is one of the most critical renewable energy resources in reducing carbon emissions and alleviating global warming. The energy production efficiency can be improved with hydropower scheduling, which, however, is a challenging optimization problem mainly attributable to the nonlinear and nonconvex hydropower output function (HOF). This work applies a new method to linearly concave the nonlinear HOF without introducing any integer variables, ensuring a very fast solution to a long-term hydropower scheduling of cascaded reservoirs. The Lancang River, which involves four cascaded reservoirs, is studied with the model and method, which takes only 34 seconds to secure the optimum monthly hydropower scheduling over five years.
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Zhou, Binbin, Suzhen Feng, Zifan Xu, Yan Jiang, Youxiang Wang, Kai Chen, and Jinwen Wang. "A Monthly Hydropower Scheduling Model of Cascaded Reservoirs with the Zoutendijk Method." Water 14, no. 23 (December 6, 2022): 3978. http://dx.doi.org/10.3390/w14233978.

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A monthly hydropower scheduling determines the monthly flows, storage, and power generation of each reservoir/hydropower plant over a planning horizon to maximize the total revenue or minimize the total operational cost. The problem is typically a complex and nonlinear optimization that involves equality and inequality constraints including the water balance, hydraulic coupling between cascaded hydropower plants, bounds on the reservoir storage, etc. This work applied the Zoutendijk algorithm for the first time to a medium/long-term hydropower scheduling of cascaded reservoirs, where the generating discharge capacity is handled with an iterative procedure, while the other head-related nonlinear constraints are represented with exponential functions fitting to discrete points. The procedure starts at an initial feasible solution, from which it finds a feasible improving direction, along which a better feasible solution is sought with a one-dimensional search. The results demonstrate that the Zoutendijk algorithm, when applied to six cascaded hydropower reservoirs on the Lancang River, worked very well in maximizing the hydropower production while ensuring the highest firm power output to be secured.
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Zou, Jin, and Feng Pan. "A Fuzzy-Dynamic-Programming Approach to the Scheduling of Cascaded Hydropower Plants." Advanced Materials Research 760-762 (September 2013): 2028–36. http://dx.doi.org/10.4028/www.scientific.net/amr.760-762.2028.

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An optimization-based algorithm is presented for the optimal operation of hydropower systems with cascaded hydro-plants. Continuous reservoir dynamics and constraints, discrete operating states, and hydraulic coupling of cascaded hydro-plants are considered in an integrated way. The main idea is to decompose the cascaded hydro-plants into individual plants, and then use Fuzzy Dynamic Programming (FDP), rather traditional Dynamic Programming (DP), to solve the subproblem of each plant while considering the hydraulic coupling of the plants. Numerical test shows that this method converges very fast, and is efficient and effective to deal with hydropower system with cascaded hydro-plants.
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Liu, Shuangquan, Guoyuan Qian, Zifan Xu, Hua Wang, Kai Chen, Jinwen Wang, and Suzhen Feng. "A Special Ordered Set of Type 2 Modeling for a Monthly Hydropower Scheduling of Cascaded Reservoirs with Spillage Controllable." Water 15, no. 17 (August 31, 2023): 3128. http://dx.doi.org/10.3390/w15173128.

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This study introduces a novel approach for optimizing the monthly hydropower scheduling of cascaded reservoirs by employing a special ordered set of type 2 (SOS2) formulation within a mixed integer linear programming (MILP) model. The proposed method linearizes the relationships between hydropower output, spillage, storage, and outflow, enabling controllable spillage. The objective is to minimize spillage, maximize firm hydropower output, and maximize energy production, all in priority while considering complex constraints such as reservoir storage and discharge bounds, upstream–downstream relationship, and water balance. The approach is applied to four cascaded reservoirs on the Lancang River. Results indicate that the SOS2 formulation effectively minimizes spillage, maximizes hydropower generation, and ensures maximum firm power output. Comparisons across different gridding resolutions reveal that more grid points yield greater benefits but with a longer solution time. Furthermore, a comparison with the Successive Quadratic Programming (SQP) method highlights the superior performance of the SOS2 model in terms of objective improvement and solution efficiency. This research offers valuable insights into optimizing monthly hydropower scheduling for cascaded reservoir systems, enhancing operational efficiency and decision-making in water resources management.
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Dissertations / Theses on the topic "Cascaded hydropower"

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Mahmoud, Mohamed Hassan. "Modelling and control of a cascaded reservoirs hydropower system." Thesis, Sheffield Hallam University, 2003. http://shura.shu.ac.uk/20001/.

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The cascaded reservoirs hydropower plant is a complex nonlinear system that involves interacting input and output nonlinear parameters, nonlinear flow rates, and nonlinear dynamical hydraulic heads. This thesis aims to enhance the existing cascaded reservoirs hydropower systems and future ones by new designs of control and optimization systems based on fuzzy logic. In this thesis, a new nonlinear mathematical model of a cascaded reservoirs hydropower plant is developed. The developed model was accurate enough to represent and simulate the plant nonlinear dynamics and to design and test three new fuzzy control systems addressing three major cascaded reservoirs hydropower plant problems. The first one is a fuzzy turbine governor replacing the classical PID controller, the second is a fuzzy controller for three hydraulically coupled turbines under nonlinear and interacting process conditions, and the third is a fuzzy supervisory control and optimization system for geographically-separated systems using the same mass of water in a partially-pumped-storage scheme.
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Santosuosso, Luca. "Distributed Stochastic Optimization for Operating Complex Virtual Power Plants : Leveraging Cascaded Run-of-the-River Hydropower Flexibility for Renewable Energy Integration." Electronic Thesis or Diss., Université Paris sciences et lettres, 2025. http://www.theses.fr/2025UPSLM001.

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La nature stochastique des sources d’énergie renouvelable variables (vRES) pose des défis importants pour leur inté-gration à grande échelle dans les systèmes électriques. Cela a conduit au développement du paradigme des centrales électriques virtuelles (VPP), qui atténue l’intermittence et la variabilité des vRES en les agrégeant avec des unités pilota-bles. À mesure que la pénétration des vRES continue de croître, les VPP devraient se développer en taille de portefeuille. Cependant, la dimension du portefeuille ne représente qu’un aspect de la complexité des VPP modernes. Ces systèmes impliquent également des facteurs tels que des dynamiques non linéaires difficiles, plusieurs sources d’incertitude et des contraintes de couplage complexes entre les unités agrégées. Ensemble, ces défis contribuent à l’évolution des VPP en systèmes à grande échelle et dynamiques, avec des dynamiques internes complexes — que l’on désigne ici sous le nom de VPP complexes. Un défi majeur dans le développement des VPP complexes est la nécessité d’outils de prise de décision rapides et évolutifs capables de maintenir à la fois la qualité de la solution et la précision. Pour y répondre, cette thèse introduit un cadre de prise de décision entièrement stochastique à deux niveaux, conçu pour optimiser la participa-tion des VPP aux marchés de l’électricité sur plusieurs étapes temporelles. Le cadre est ensuite entièrement décomposé selon les dimensions des scénarios et spatiale, permettant la création d’un algorithme distribué évolutif garantissant la performance, même pour les modèles VPP à variables entières mixtes. La méthodologie est validée par une étude de cas réelle de l’agrégateur français Compagnie Nationale du Rhône, qui gère un VPP complexe combinant des centrales hydroélectriques à cours d’eau, des actifs éoliens et solaires. Les résultats montrent que ce VPP complexe peut améliorer l’intégration des vRES sans recourir à des solutions de stockage conventionnelles. De plus, les méthodes distribuées proposées répondent efficacement aux complexités du système, offrant des garanties de performance fiables et une évolutivité pour les opérations des VPP
The inherent stochasticity of variable renewable energy sources (vRES) challenges their widespread integration, prompt-ing the emergence of the virtual power plant (VPP) paradigm, which reduces vRES variability through their combined operation with flexible, dispatchable units. As vRES penetration continues to grow, VPPs are expected to expand in portfolio size. However, the portfolio dimension represents only one aspect of the complexity of modern VPPs. These systems also involve factors such as hard nonlinear dynamics, multiple sources of uncertainty, and intricate coupling constraints between aggregated units. Together, these challenges contribute to the evolution of VPPs into large-scale, dynamic systems with complex internal dynamics—referred to here as complex VPPs. A major challenge in the devel-opment of complex VPPs is the need for fast, scalable decision-making tools that can maintain both solution quality and accuracy. To address this, this thesis introduces a two-level, scenario-based, fully stochastic decision-making framework designed to optimize VPP participation in the electricity markets across multiple time stages. The framework is then fully decomposed along both the scenario and spatial dimensions, enabling the creation of a scalable distributed algorithm that guarantees performance, even for mixed-integer VPP models. This methodology is validated through a real-world case study from the French aggregator Compagnie Nationale du Rhône, which manages a complex VPP combining run-of-the-river cascaded hydropower plants, wind, and solar assets. The results show that this complex VPP can enhance vRES integration without relying on conventional storage solutions. Furthermore, the proposed distributed methods effectively address system complexities, providing reliable performance guarantees and scalability for complex VPP operations
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Gullhamn, Esbjörn. "Control of Water Content and Retention in Hydropower Plant Cascades." Thesis, KTH, Reglerteknik, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-109482.

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The discharge through a river hydropower plant must be controlled such that the water level at a pre-specified point close to the facility is kept within given bounds. The controllers used today have a somewhat demanding tuning and often create too much amplified, unnatural discharge variations resulting in unsatisfactory control performance.This will affect both surrounding nature and imposing problems for river navigation. This thesis will present a new type of controller called Override Selector feedback Control that adds an estimator for the water levels and water flows in the up- and downriver for each hydropower plant on top of the old controller. The objective of the state feedback control is to keep the total variation of the water levels and the waterflows as small as possible. After the linear, discrete time model of the power plant cascade in a river derived from the Saint Venant equations have been developed, the new concept is evaluated. Both the water level sloshing and the amplification of the discharges compared to the structure used today is damped with the new control structure. Other advantages of the proposed controller is that it will be cost efficient to implement because of the add-on approach. This is seen as a very important factor while the actual benefit that can be made by improving the water level control is very limited and thereby also the will to make extensive control investments. The control structure will be easily implemented as the estimators only need the same input data as used today.
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Imamoglu, Berker Yalin. "Operation Of Cascade Dams Considering Various Scenarios And Financial Analysis Of Scenarios." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615413/index.pdf.

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In assuring the energy supply of Turkey, hydroelectric energy plays one of the most important roles in plans formulated to realize equilibrium between energy production and consumption. Hydroelectric power plants on Murat River, a tributary of Euphrates, is a part of the development plan for energy production. Operation of four dams in cascade on Murat River are simulated by using program package HECResSim. For this purpose, ten scenarios are formulated to utilize the hydraulic potential of Murat River between the elevations of 870 m 1225 m. This study provides detailed financial analyses of scenarios and shows how HEC-ResSim program can be used in formulation of alternative scenarios. Electric energy storage requirement due to the rising demand for peaking power is creating a completely new market value, which is also increasing the attractiveness of pumped storage power plants. The results of the simulation performed in Scenario 10 in which two pumped storage power plants are considered have 15% higher internal rate of return value than the other scenarios with conventional turbines. Results demonstrate the increasing attractiveness of the cascade system with reversible pump turbines.
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Silva, Antonio Carlos Coelho da. "Impactos cumulativos de hidrelétricas sobre a hidrologia e qualidade da água de um rio contribuinte do Pantanal." Universidade Federal de Mato Grosso, 2015. http://ri.ufmt.br/handle/1/232.

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A maior planície inundável do mundo, o Pantanal, tem como seu principal contribuinte formador o Rio Paraguai. Em sua Região Hidrográfica foram instaladas cinco hidrelétricas e cinquenta e oito Pequenas Centrais Hidrelétricas (PDHs). No Rio Jauru, afluente importante do Rio Paraguai, uma sequência de 6hidrelétricas foi construída no gradiente longitudinal do rio. Neste estudo, que visou identificar e analisar os impactos sobre a hidrologia e qualidade da água do Rio Jauru, devido à operação em cascata das hidrelétricas, foi considerado não apenas o impacto individual produzido por cada hidrelétrica, mas também, o resultado de seus impactos de forma integrada. Foram analisados 12 parâmetros formadores da qualidade de água do rio em, diversos pontos no longitudinal do rio, a montante e a jusante das hidrelétricas. Também foram analisados 32 parâmetros hidrológicos utilizando o através do software IHA. Alterações na hidrologia e na qualidade da água após a instalação das usinas hidrelétricas foram verificadas. Os resultados deste estudo questionam a teoria que pequenas centrais hidrelétricas provocam pouco impacto ambiental no rio.
The Paraguay River is the major tributary of the largest floodplain in the world, the Pantanal. Itsbasincontains five hydropower plants and fifty-eight small hydro power plants. In the Jauru River, an important tributary of the Paraguay River, a cascade of six hydropower plants was built along the longitudinal gradient of the river. The present study aimed at identifying and analyzing the impacts on the hydrology and water quality of the Jauru River caused by the cascade hydropower plants, considering not only the individual impact produced by each one but also the combination of their impacts together. We analyzed 12 parameters indicating water quality of the river, data from several sites along the longitudinal axis of the river, upstream and downstream of the reservoirs lakes. Also, 32 hydrological parameters were examined with the aid of the software IHA. Changes in hydrology and water quality were found after the installation of the hydropower plants. Our results question the assertion that small hydropower plants have little environmental impact on the river.
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Bou-Fakhreddine, Bassam. "Modeling, Control and Optimization Of Cascade Hydroelectric-Irrigation Plants : Operation and Planning." Thesis, Paris, CNAM, 2018. http://www.theses.fr/2018CNAM1172.

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Ce travail de recherche vise à optimiser la procédure opérationnelle des centrales hydroélectriques en cascade afin de les utiliser efficacement pour la production d’électricité et l’irrigation. Le défi consistait à trouver le modèle le plus réaliste basé sur la caractéristique stochastique des ressources en eau, sur la demande en énergie et sur le profil d'irrigation. Tous ces aspects sont affectés à court et à long terme par un large éventail de conditions différentes (hydrologique, météorologique et hydraulique). Au cours de ce projet, une étude bibliographique a été réalisée afin d'identifier les problèmes techniques qui empêchent l'utilisation efficace des centrales hydroélectriques dans les pays en développement. Le système est modélisé numériquement en tenant compte de toutes les variables et paramètres impliqués dans le fonctionnement optimal. L'approche la plus appropriée est choisie afin de maximiser l'utilisation efficace de l'eau et de minimiser les pertes économiques, où différents scénarios sont simulés afin de valider les solutions adoptées
This research work aims to optimize the operational procedure of cascade hydro plants in order to be efficiently used for power generation and irrigation. The challenge was to find the most realistic model based on the stochastic feature of water resources, on the power demand and on the irrigation profile. All these aspects are affected on the short and on the long run by a wide range of different conditions (hydrological, meteorological and hydraulic). During this project a bibliographic study was done in order to identify the technical issues that prevent the efficient use of hydro plants in developing countries. The system is numerically modelled taking into consideration all the variables and parameters involved in the optimal operation. The most appropriate approach is chosen in order to maximize the efficient use of water and to minimize economical losses, where different scenarios are simulated in order to validate the adopted suggestions
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7

Bou-Fakhreddine, Bassam. "Modeling, Control and Optimization Of Cascade Hydroelectric-Irrigation Plants : Operation and Planning." Electronic Thesis or Diss., Paris, CNAM, 2018. http://www.theses.fr/2018CNAM1172.

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Ce travail de recherche vise à optimiser la procédure opérationnelle des centrales hydroélectriques en cascade afin de les utiliser efficacement pour la production d’électricité et l’irrigation. Le défi consistait à trouver le modèle le plus réaliste basé sur la caractéristique stochastique des ressources en eau, sur la demande en énergie et sur le profil d'irrigation. Tous ces aspects sont affectés à court et à long terme par un large éventail de conditions différentes (hydrologique, météorologique et hydraulique). Au cours de ce projet, une étude bibliographique a été réalisée afin d'identifier les problèmes techniques qui empêchent l'utilisation efficace des centrales hydroélectriques dans les pays en développement. Le système est modélisé numériquement en tenant compte de toutes les variables et paramètres impliqués dans le fonctionnement optimal. L'approche la plus appropriée est choisie afin de maximiser l'utilisation efficace de l'eau et de minimiser les pertes économiques, où différents scénarios sont simulés afin de valider les solutions adoptées
This research work aims to optimize the operational procedure of cascade hydro plants in order to be efficiently used for power generation and irrigation. The challenge was to find the most realistic model based on the stochastic feature of water resources, on the power demand and on the irrigation profile. All these aspects are affected on the short and on the long run by a wide range of different conditions (hydrological, meteorological and hydraulic). During this project a bibliographic study was done in order to identify the technical issues that prevent the efficient use of hydro plants in developing countries. The system is numerically modelled taking into consideration all the variables and parameters involved in the optimal operation. The most appropriate approach is chosen in order to maximize the efficient use of water and to minimize economical losses, where different scenarios are simulated in order to validate the adopted suggestions
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Stareček, Jakub. "Rychloběžná turbína s nepravidelnou lopatkovou mříží." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-438295.

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This doctoral thesis is focused on hydraulic design of axial turbine by CFD and FEM analyses. The results are runners with nonuniform cascades. Nonuniform runners consist of blades with different axial positions, blades with different pitch angles in runner or indifferent blades. Each runner is designed with respect to 3D printing by FDM or SLS technology and hydraulic measuring. The analyses of the excitation frequencies, modal analysis, shape of the turbine operating range, maximal efficiency, output parameters and cavitation properties are emphasized.
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Books on the topic "Cascaded hydropower"

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US GOVERNMENT. Columbia River hydropower operations: Hearings before the Subcommittee on Water and Power of the Committee on Energy and Natural Resources, United States ... Cascade Locks, OR, April 18, 2000 (S. hrg). For sale by the U.S. G.P.O., Supt. of Docs., Congressional Sales Office, 2000.

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Columbia River hydropower operations: Hearings before the Subcommittee on Water and Power of the Committee on Energy and Natural Resources, United States Senate, One Hundred Sixth Congress, second session, on federal actions affecting hydroelectric operations on the Columbia River System, Washington, DC, April 12, 2000, Cascade Locks, OR, April 18, 2000. Washington: U.S. G.P.O., 2000.

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Book chapters on the topic "Cascaded hydropower"

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Li, Yang, Jianxin Zhou, Rong Dai, Tianqing Li, and Baiyin Yang. "Application of Multi-objective Intelligent Management and Control Platform for Cascade Reservoirs—Case Study on Nam Ou River in Laos." In Lecture Notes in Civil Engineering, 61–71. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-7251-3_6.

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AbstractIn the construction and operation of cascaded reservoir groups, higher requirements have been put forward for multi-objective optimization scheduling of cascaded reservoir groups, aiming to promote benefits and eliminate hazards through joint scheduling, leverage comprehensive benefits, ensure basin safety, and meet the needs of digital transformation of hydropower and water conservancy. Based on the research of integrated methods for hydrological forecasting, multi-objective scheduling, and decision-making of basin cascade reservoirs, this study constructs a multi-objective intelligent control system that serves hydrological forecasting, cascade scheduling, flood control, and risk assessment of cascade reservoirs, and applies it to the development of cascade hydropower in the southern European river basin of Laos.
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Zhang, Guoyong, Yonggang Wu, Feng Zhang, and Xinglong Liu. "Application of Adaptive Quantum Particle Swarm Optimization Algorithm for Optimal Dispatching of Cascaded Hydropower Stations." In Lecture Notes in Computer Science, 463–70. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31576-3_59.

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Li, Tianqing, Peng Lu, Pengcheng Zhou, Bing Han, Zijun Yang, and Kaibin Yang. "Research on Load Distribution Method of Cascade Hydropower Station with Maximum Energy Storage at the End of Dispatching Period." In Lecture Notes in Civil Engineering, 215–27. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-9184-2_19.

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AbstractThe paper focuses on how to rationally distribute the load of cascade hydropower station in the short term economic operation to meet the grid requirements and improve the water energy efficiency of cascade hydropower stations. In this paper, a calculation method of energy storage for cascade hydropower station is presented, the change of cascade storage caused by power generation of different hydropower stations is studied, and the influence of reservoir capacity characteristics on load distribution of cascade hydropower stations is analyzed. According to the short term economic operation and dispatching requirements of cascade hydropower station, the load distribution model of cascade hydropower station based on the maximum storage capacity at the end of the term is constructed. Taking the short-term load distribution of cascade hydropower stations in the Nam Ou River Basin of Laos as an example, four scheduling schemes with different boundary conditions are calculated. The results show that the load distribution results of cascade hydropower stations in the Nam Ou River based on the maximum energy storage the end of the period are as follows: Nam Ou4 and Nam Ou1 in the downstream with larger changes in water level per unit storage capacity are preferentially stored, Nam Ou7, Nam Ou6 and Nam Ou2 in the upstream with larger storage capacity are preferentially supplied and generating power. The research results can provide guidance for the short-term economic operation and dispatch of cascade hydropower stations, and help to improve the water energy utilization efficiency of cascade hydropower stations.
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Cheng, Shan, Xiaoyu Jiang, and Wei Chen. "Multi-objective Optimal Operation of Cascaded Hydropower Stations Based on MOPSO with Bacteria Quorum Sensing Inspired Turbulence Mechanism." In Communications in Computer and Information Science, 63–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-49014-3_6.

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Noskov, Robert, Krešimir Fekete, Ružica Kljajić, and Zvonimir Klaić. "Testing the Procedure for Optimization of Cascaded Hydropower Plants and Wind Power Plants Using the IEEE 14 Bus System." In 30th International Conference on Organization and Technology of Maintenance (OTO 2021), 131–45. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-92851-3_10.

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Lijuan, Bian, Yi Zhang, and Li Shuming. "Research on Real-Time Intelligent Control Technology for Runoff Cascade Hydropower Station Group." In Lecture Notes in Civil Engineering, 165–75. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-9184-2_15.

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AbstractAn in-depth research was conducted on the real-time scheduling issues involved in the joint operation of runoff cascade hydropower station under high-intensity peak-load regulation and frequency regulation requirements, and proposed an intelligent control method for real-time load regulation of runoff cascade hydropower stations. Based on the characteristics of real-time power generation scheduling of cascade hydropower stations, ensuring the effectiveness and flexibility of scheduling strategies, taking into account the constraints of reservoir operation, grid safety, unit operation, and the impact of different water heads on unit power generation efficiency, aiming to achieve stable water level control of runoff type hydropower stations and rapid response of cascade total load control. Real time load Control is divided into two categories: dispatching mode and non dispatching mode. In the dispatching mode, constructed water power determination, stable water level, less load regulation, load balance economic dispatching models, to predict in advance whether the day ahead load planning curve needs to be adjusted and automatically track the planning curve. In non dispatch mode, automatically match the abnormal water level control model based on PID regulation and the stable water level model that meets the requirements of efficient power generation. At the same time, proposed a water level control solution method based on successive approximation and multi-objective dynamic programming, as well as a mixed integer programming model for reducing the difficulty of solving real-time hydropower scheduling for load allocation. The application of the proposed model in the cascade hydropower stations in the Shaxi River Basin shows that it can achieve high-precision automatic load adjustment, effectively reduce the number of regulation times by 6%, and only retain one dispatcher per shift, greatly reducing the work intensity of operators on duty. This research effectively improves the centralized control capability and economic operation level of the watershed, and has rich theoretical and practical significance for promoting the intelligent and intelligent construction of real-time load scheduling for cascade power stations.
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Haoyu, Ma, Cao Hui, Liu Yaxin, Xu Yang, and Tian Rui. "Research on the Dispatching Decision Method of Cascade Hydropower Stations Based on the BVWS." In Lecture Notes in Civil Engineering, 137–45. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-9184-2_12.

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AbstractCompared with the operation of a single hydropower station, the difficulty of operation and management for cascade hydropower stations increases exponentially. Especially during the critical periods such as concentrated drawdown before flood season and concentrated storage during late flood season, the dispatching strategies of cascade stations are crucial for successfully realizing operation objectives and enhancing power generation benefits of the cascade system. Scientific methods should be used to formulate long-, medium-, and short-term operation strategies, and the sequence of drawdown or storage for cascade reservoirs should be arranged reasonably to maximize the system benefits. Current research typically utilizes reservoir dispatching diagrams or optimal dispatching models to develop scheduling plans. Reservoir dispatching diagrams can be used to quickly access the operation schemes for reservoirs, but it cannot guarantee the optimal power generation benefits within a given dispatching period. Optimal models typically utilize algorithms such as dynamic programming to solve and obtain corresponding scheduling solutions, achieving the maximization of reservoir dispatching objectives. However, the problem of dimension disaster often easily occurs. To balance the optimization of system benefits and the efficiency of formulating operation plan, this paper proposes a benefit evaluation index, namely Benefit Variation from Water Storage (BVWS), which simultaneously couples water head benefits and backwater jacking influence of hydropower stations.Based on this, the graphs of BVWS for cascade stations are drawn, which can assist decision-makers in quickly formulating dispatching strategies for different time scales. Taking a cascade system composed of four hydropower stations in the upper reaches of the Yangtze River as the research object, this paper compares the calculation results and efficiency of the proposed method with the progressive optimality algorithm (POA). The results indicate that the proposed method can remarkably reduce the time required to develop optimal operation schemes, enabling a rational allocation of water resources among the cascade stations, therefore proving the scientific rationality of this method.
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Hong, Kunhui, Aixing Ma, Yin Hu, Wei Zhang, and Mingxiong Cao. "Multiobjective Operation of Cascade Reservoirs Considering Different Ecological Flows." In Lecture Notes in Civil Engineering, 446–61. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-9184-2_37.

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AbstractReservoir scheduling is an important and effective measure to optimize water resource allocation. It effectively mitigates issues such as regional water scarcity and ecological degradation and plays a crucial role in supporting sustainable water resource development. The Yellow River has experienced severe water scarcity, and the increasing human water demand in recent decades has significantly reduced the river’s ecological flow, causing significant ecological damage. Balancing the benefits of ecological flow, hydropower generation, and water supply and selecting appropriate ecological flow levels for different hydrological years is a major challenge for reservoir operators. This paper aims to integrate ecological flow into reservoir management standards by investigating the competition and reasonable coexistence between reservoir benefits and ecology in water-scarce regions. A multiobjective reservoir ecology management model was proposed to study the effects of different ecological flow levels on hydropower generation, water supply, and storage. Using the LYX and LJX reservoirs as a case study, the results illustrate the applicability and effectiveness of the model in balancing conflicts among hydropower generation, water supply, storage, and ecology in multi-objective reservoir management. Under basic ecological flow management, hydropower generation and water supply benefits are fully met in typical years, with a significant increase in hydropower generation. Under suitable ecological flow management, hydropower generation and water supply benefits are met only in abundant water years. Considering the impact of storage on management, in typical normal and dry years, under suitable flow management standards, the hydropower generation and water supply guarantee rate targets are approximately 12.49 billion kWh, 96.71%, and 8.22 billion kWh, 96.71%, respectively, promoting efficient water resource utilization and enhancing future drought resilience.
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Yu, Kaiwen, Changhai Han, Kang Han, Jianjun Zhao, and Zhiguang Yu. "Experimental Study on Navigation Flow Condition of Downstream Approach Channel of Navigation Facilities of Baise Water Conservancy Project." In Lecture Notes in Civil Engineering, 1471–80. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_130.

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AbstractBaise Water Conservancy Project is the second cascade in the Yujiang River planning, and its navigation facilities are one of the key projects to get through Yunnan and Guizhou. The exit of the downstream approach channel of the navigation facilities of the Baise Water Conservancy Project is located about 700 m downstream of the Dongsun Hydropower Station, so the operation of Dongsun Hydropower Station has a direct impact on the navigation flow condition of the approach channel. In addition, the topography of the river also has an obvious influence on the navigation conditions at the entrance area of the approach channel. So, based on the overall hydraulic model with a scale of 1:80 and the self-navigating ship simulation test, the navigation flow conditions at the entrance area of the approach channel and the characteristics of the ship entering and exiting the ship lock were studied. The test results show that: (1) Under the condition that the discharge of Dongsun Hydropower Station is less than1500 m3/s at full power, the flow pattern in the downstream channel of the hydropower station and the entrance area of the approach channel is relatively smooth. The flow pattern, velocity and wave height can meet the specification requirements. The maximum rudder angle and drift angle at the entrance area of the approach channel do not exceed the requirements, and the ship can enter and exit the downstream approach channel smoothly; (2) The maximum navigation discharge of 1700 m3/s can be achieved by adjusting the route of the connecting section of the downstream approach channel to the left bank and dredging the two convex points on the right bank of the entrance area of the downstream approach channel.
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Guan, Mingfang, Ming Zhang, Changhai Han, Leng Qing, and Yu Hang. "Research on the Non-constant Navigable Water Flow Conditions of the River Channel Downstream of the Navigable Facilities of Baise Water Control Project." In Lecture Notes in Civil Engineering, 1522–34. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_135.

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AbstractThe exit of Baise ship lift on the Right River is only about 700 m away from Dongsun Hydropower Station. Its dispatching operation, especially the unsteady flow, has a direct impact on the navigable water flow conditions of the approach channel gate area and river channel downstream of the Baise ship lift. According to some characteristics of Baise Junction and Dongsun Junction and the measured topography of Baoai River, a plane two-dimensional numerical model of the research river section is constructed, and the water flow changes in the mouth area under different working conditions are simulated and calculated. The research results show that the safety of navigation in the entrance area can be guaranteed from two aspects: optimizing the operation mode of the Baise and Dongsun cascade hydropower stations, and rationally formulating the downstream ship navigation management mode. Under the operating conditions of the four units of Baise Power Station, it is recommended that the ship wait for 0.5 h after the two units in Dongsun are started, so as to avoid the maximum water level increase period in the first half hour.
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Conference papers on the topic "Cascaded hydropower"

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Wu, Zhengqiang, Jiesheng Fan, Quan’e Zhang, Huan Han, Juwen Song, and Zhongxia Jin. "Optimization Scheduling for Cascaded Hydropower Groups Adapted to Tiered Carbon Trading." In 2024 7th International Conference on Electronics Technology (ICET), 501–6. IEEE, 2024. http://dx.doi.org/10.1109/icet61945.2024.10672978.

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Xu, Rongli, Xiaoqiang Tan, He Wang, Zhiwei Zhu, Xueding Lu, and Chaoshun Li. "Synergetic Controller Design for Two-stage Cascaded Hydropower Stations with Regulating Reservoir." In 2024 4th Power System and Green Energy Conference (PSGEC), 1131–36. IEEE, 2024. http://dx.doi.org/10.1109/psgec62376.2024.10721030.

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Wang, Jiayang, Xingyu Liu, Siyu Lu, Ouzhu Han, Baorong Zhou, and Tao Ding. "Power and Energy Balance Optimization for Power Systems with Cascaded Hydropower Based on Stochastic Optimization." In 2024 4th International Conference on Energy Engineering and Power Systems (EEPS), 112–16. IEEE, 2024. https://doi.org/10.1109/eeps63402.2024.10804298.

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Zhang, Yan, Huaying Su, Rongrong Wang, Ning Wang, and Xianqiang He. "Optimization Method for Peak Shaving of Wind and Photovoltaic Power Generation Considering Integrated Pumped Storage Retrofitting in Cascaded Hydropower Systems." In 2024 IEEE 2nd International Conference on Electrical, Automation and Computer Engineering (ICEACE), 981–87. IEEE, 2024. https://doi.org/10.1109/iceace63551.2024.10898494.

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Yan, Tianxiao, Su Guo, and Hao Sun. "Complementary Scheduling of Cascade Hydropower Stations and Photovoltaic Power Considering Daily Regulating Hydropower Stations." In 2024 IEEE PES 16th Asia-Pacific Power and Energy Engineering Conference (APPEEC), 1–5. IEEE, 2024. https://doi.org/10.1109/appeec61255.2024.10922402.

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Jiao, Ye, Renshan Ding, Liang Zhang, Deping Jian, Feng Wu, and Yang Li. "Cooperative Operation of Multi-Operator Hybrid Pumped Storage Cascade Hydropower Plants." In 2024 4th Power System and Green Energy Conference (PSGEC), 382–86. IEEE, 2024. http://dx.doi.org/10.1109/psgec62376.2024.10721027.

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Cai, Zhi, Xiaojing Hu, Qiang Ding, Yuxuan Li, and Chi Zhang. "Linearization and Acceleration Strategy of Unit Commitment Model Incorporating Cascade Hydropower." In 2024 IEEE 8th Conference on Energy Internet and Energy System Integration (EI2), 3179–85. IEEE, 2024. https://doi.org/10.1109/ei264398.2024.10990677.

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Huang, Xin, Haoning Wang, Yuting Fu, Yayan Wang, and Yanxi Luo. "Research on Data Fusion Technology in Output Forecasting of Cascade Hydropower Stations." In 2024 International Conference on Control, Electronic Engineering and Machine Learning (CEEML), 77–81. IEEE, 2024. https://doi.org/10.1109/ceeml65709.2024.00017.

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Zhang, Yan, Ning Wang, Huaying Su, Xianqiang He, and Rongrong Wang. "Economic Operation Scheduling Rules for Cascade Hydropower-Wind-Photovoltaic Complementary Systems with Hybrid Pumped Storage." In 2024 3rd International Conference on Energy, Power and Electrical Technology (ICEPET), 328–31. IEEE, 2024. http://dx.doi.org/10.1109/icepet61938.2024.10626626.

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Ren, Zaimin, Bin Ju, Yuhao Ma, Mingna Chu, Guohua Liang, and Bin He. "Fuzzy Integrated Evaluation of Flood Control and Power Generation Scheduling Scheme of Cascade Hydropower Stations." In 2024 20th International Conference on Natural Computation, Fuzzy Systems and Knowledge Discovery (ICNC-FSKD), 1–6. IEEE, 2024. http://dx.doi.org/10.1109/icnc-fskd64080.2024.10702239.

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Reports on the topic "Cascaded hydropower"

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Case Study on Development of Hydropower Risks and Impact Mitigation Guidelines and Recommendations (Volume 3, 1st Interim Report). Vientiane, Lao PDR: Mekong River Commission Secretariat, December 2015. http://dx.doi.org/10.52107/mrc.ajg81o.

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Republic of Bulgaria Sreden Iskar Cascade hydropower development. Application for participation under the United States Initiative on Joint Implementation. Office of Scientific and Technical Information (OSTI), November 1998. http://dx.doi.org/10.2172/319880.

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