scholarly journals SMALL HYDROPOWER IN LATVIA AND INTELLECTUALIZATION OF ITS OPERATING SYSTEMS / PAR MAZO HIDROENERĢĒTIKU LATVIJĀ UN TĀS STACIJU VADĪBAS SISTĒMAS INTELEKTUALIZĀCIJU

2013 ◽  
Vol 50 (6) ◽  
pp. 3-15 ◽  
Author(s):  
A. Mahnitko ◽  
J. Gerhards ◽  
O. Linkevics ◽  
R. Varfolomejeva ◽  
I. Umbrasko
Keyword(s):  
Power Generation ◽  
Mathematical Programming ◽  
Operating Systems ◽  
Optimality Criterion ◽  
Optimal Operation ◽  
Hydropower Plant ◽  
Small Scale ◽  
Small Hydropower ◽  
Reduced Gradient ◽  
Generalized Reduced Gradient

Abstract The authors estimate the potential for power generation from water resources of small and medium-sized rivers, which are abundant in Latvia. They propose the algorithm for optimal operation of a small-scale hydropower plant (SHPP) at the chosen optimality criterion in view of the plant’s participation in the market. The choice of SHPP optimization algorithm is made based on two mathematical programming methods - dynamic and generalized reduced gradient ones. Approbation of the algorithm is illustrated by an example of optimized SHPP operation.

scholarly journals Potential of Small-Scale Hydropower for Electricity Generation in Sub-Saharan Africa

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Chiyembekezo S. Kaunda ◽  
Cuthbert Z. Kimambo ◽  
Torbjorn K. Nielsen
Keyword(s):  
Power Generation ◽  
Technology Development ◽  
Expert Knowledge ◽  
Sub Saharan Africa ◽  
Small Scale ◽  
Electricity Supply ◽  
African Region ◽  
Small Hydropower ◽  
Wide Range ◽  
Sub Saharan

The importance of renewable energy such as small hydropower for sustainable power generation in relation to its capacity to contribute towards alleviating acute shortage of rural electricity supply in the sub-Saharan African region has been discussed. A relatively comprehensive small hydropower technology review has been presented. Rural electricity supply scenario in the region has been presented and, in general, the region has very low electricity access levels coupled with various challenges. Small hydropower technology has been discussed as one of the promising decentralised power generation system for rural electricity supply in the region. Despite challenges in data acquisition, this paper has shown that the SSA has significant hydropower resources, but the level of installation is very low. Challenges hampering SHP technology development in the region have been identified and discussed, such as those concerning technology, climate change, finance, and policy. This is basically a paper where the authors consulted a wide range of literature including journals, conference proceedings, and reports as well as expert knowledge in the area. It is hoped that this paper contributes to the information base on SHP technology which is quite lacking in the region.

scholarly journals The Small Hydropower Plant Income Maximization Using Games Theory

2021 ◽  
Vol 9 ◽  
pp. 14-19
Author(s):  
Antans Sauhats ◽  
Renata Varfolomejeva ◽  
Inga Umbrasko ◽  
Hasan Coban
Keyword(s):  
Cooperative Game Theory ◽  
Current System ◽  
Hydropower Plant ◽  
Small Rivers ◽  
Small Scale ◽  
Theory Approach ◽  
Small Hydropower ◽  
Hydro Power ◽  
Games Theory ◽  
Additional Income

This paper is devoted to the consideration of case of the use of small rivers energy, the current system of support relevant projects, its drawbacks and opportunities to remove them. Cooperative game theory approach is used for analysis of regime management of the small-scale hydro power plant (SHPP). Technical and economical aspects of the issue are observed. The obtained results demonstrate the validity of the cooperation for obtaining additional income.

scholarly journals ENERGIZING COMMUNITIES THROUGH PARTNERSHIPS WITH EXTERNAL ACTORS: SMALL-SCALE HYDROPOWER PROJECTS IN JAPAN

2021 ◽  
Vol 5 (1) ◽  
pp. 63
Author(s):  
Yasuko Honda
Keyword(s):  
Renewable Energy ◽  
Alternative Energy ◽  
Expert Knowledge ◽  
Population Decline ◽  
Energy Resource ◽  
Hydropower Plant ◽  
Small Scale ◽  
Small Hydropower ◽  
Energy Projects ◽  
External Actors

This study aims to specify the contextual conditions that allow for the success of community renewable energy projects, against the background of the expanding use of renewable energy. It analyzes cases where farmers invested in organizations to establish ownership of hydropower plants in the Chugoku region, Japan. Community renewable energy projects derived from local initiatives to provide an alternative energy resource and serve as a catalyst for rural development. However, the costs of small hydropower plant construction and the expert knowledge required for their operation could hinder the diffusion of the technology. Population decline and aging in rural communities also constrain the development of community renewable energy projects. This study presents cases that illuminate the conditions enabling these organizations to succeed in securing the necessary resources for the operation of their renewable energy plants. The survey illustrates how studied organizations have opted to collaborate with external actors to construct or refurbish their plants. The findings indicate that as building partnerships with external actors often becomes essential, it is vital to develop a business-minded framework in which both communities and external actors can financially benefit from introducing small hydropower projects. The cases also reveal that in building collaborative relationships, broad disparities exist between communities and external actors in financial power and expert knowledge, which give the latter substantial advantages in negotiations. An additional important claim derived is that, for an effective partnership that enables a successful community renewable energy project, a third party with expert knowledge and the ability to audit partnership-building processes could play a crucial role in securing community initiatives and independence.

scholarly journals A conceptual framework for real time estimation of WFP for small hydroelectric power plant

Water Policy ◽  
2017 ◽  
Vol 19 (6) ◽  
pp. 1049-1062
Author(s):  
C. Sivapragasam ◽  
M. Pallikonda Rajasekaran ◽  
M. Vinotha
Keyword(s):  
Power Generation ◽  
Real Time ◽  
Water Footprint ◽  
Time Estimation ◽  
Hydropower Plant ◽  
Hydroelectric Power ◽  
Small Hydropower ◽  
Water Release ◽  
Large Reservoir ◽  
Operation Conditions

Abstract It is believed that the power sector, particularly hydroelectric power, contributes to a very high consumption of fresh water in terms of evaporation from storage reservoirs. Robust methods of water footprint (WFP) assessment will eventually help in the pricing of water and energy. Conventionally, WFP for hydropower plants is estimated by dividing the gross/net evaporation losses by power generation. This approach is highly biased when it comes to a small hydropower plant connected to a large reservoir. In this study, a two-pronged subjective–objective method is suggested for a reservoir with primary functions of power generation and downstream water release. The objective part is concerned with giving weight to the evaporation loss proportional to the water use while the subjective part is concerned with refining this by considering the real time reservoir operation conditions and taking into account the recommendations of the decision making authorities. The effect of timescale in WFP analysis is also studied and conclusions are drawn. Thumb rules for WFP estimation are evolved which will aid in such analysis. The implementation of the proposed methodology for any reservoir system is recommended using LabVIEW platform.

scholarly journals Inverse Optimal Control Using Metaheuristics of Hydropower Plant Model via Forecasting Based on the Feature Engineering

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7356
Author(s):  
Marlene A. Perez-Villalpando ◽  
Kelly J. Gurubel Tun ◽  
Carlos A. Arellano-Muro ◽  
Fernando Fausto
Keyword(s):  
Power Generation ◽  
Energy Demand ◽  
Optimal Operation ◽  
Hydropower Plant ◽  
Feature Engineering ◽  
Generation Process ◽  
External Perturbations ◽  
Hydropower Plants ◽  
Control Scheme ◽  
Using Data

Optimal operation of hydropower plants (HP) is a crucial task for the control of several variables involved in the power generation process, including hydraulic level and power generation rate. In general, there are three main problems that an optimal operation approach must address: (i) maintaining a hydraulic head level which satisfies the energy demand at a given time, (ii) regulating operation to match with certain established conditions, even in the presence of system’s parametric variations, and (iii) managing external disturbances at the system’s input. To address these problems, in this paper we propose an approach for optimal hydraulic level tracking based on an Inverse Optimal Controller (IOC), devised with the purpose of regulating power generation rates on a specific HP infrastructure. The Closed–Loop System (CLS) has been simulated using data collected from the HP through a whole year of operation as a tracking reference. Furthermore, to combat parametric variations, an accumulative action is incorporated into the control scheme. In addition, a Recurrent Neural Network (RNN) based on Feature Engineering (FE) techniques has been implemented to aid the system in the prediction and management of external perturbations. Besides, a landslide is simulated, causing the system’s response to show a deviation in reference tracking, which is corrected through the control action. Afterward, the RNN is including of the aforementioned system, where the trajectories tracking deviation is not perceptible, at the hand of, a better response with respect to use a single scheme. The results show the robustness of the proposed control scheme despite climatic variations and landslides in the reservoir operation process. This proposed combined scheme shows good performance in presence of parametric variations and external perturbations.

scholarly journals Development of a Hydropower Turbine Using Seawater from a Fish Farm

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 266
Author(s):  
Md Rakibuzzaman ◽  
Sang-Ho Suh ◽  
Hyoung-Ho Kim ◽  
Youngtae Ryu ◽  
Kyung Yup Kim
Keyword(s):  
Power Plants ◽  
Guide Vane ◽  
Cross Flow ◽  
Synchronous Generator ◽  
Fish Farm ◽  
Hydropower Plant ◽  
Fish Farms ◽  
Data Simulation ◽  
Small Hydropower ◽  
Hydropower Plants

Discharge water from fish farms is a clean, renewable, and abundant energy source that has been used to obtain renewable energy via small hydropower plants. Small hydropower plants may be installed at offshore fish farms where suitable water is obtained throughout the year. It is necessary to meet the challenges of developing small hydropower systems, including sustainability and turbine efficiency. The main objective of this study was to investigate the possibility of constructing a small hydropower plant and develop 100 kW class propeller-type turbines in a fish farm with a permanent magnet synchronous generator (PMSG). The turbine was optimized using a computer simulation, and an experiment was conducted to obtain performance data. Simulation results were then validated with experimental results. Results revealed that streamlining the designed shape of the guide vane reduced the flow separation and improved the efficiency of the turbine. Optimizing the shape of the runner vane decreased the flow rate, reducing the water power and increasing the efficiency by about 5.57%. Also, results revealed that tubular or cross-flow turbines could be suitable for use in fish farm power plants, and the generator used should be waterproofed to avoid exposure to seawater.

scholarly journals Optimal operation of multi-reservoir systems for increasing power generation using a seagull optimization algorithm and heading policy

2021 ◽  
Vol 7 ◽  
pp. 3703-3725
Author(s):  
Mohammad Ehteram ◽  
Fatemeh Barzegari Banadkooki ◽  
Chow Ming Fai ◽  
Mohsen Moslemzadeh ◽  
Michelle Sapitang ◽  
...  
Keyword(s):  
Power Generation ◽  
Optimization Algorithm ◽  
Optimal Operation ◽  
Reservoir Systems

scholarly journals Fishways as Downstream Routes in Small Hydropower Plants: Experiences with a Potamodromous Cyprinid

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1041
Author(s):  
Francisco Javier Sanz-Ronda ◽  
Juan Francisco Fuentes-Pérez ◽  
Ana García-Vega ◽  
Francisco Javier Bravo-Córdoba
Keyword(s):  
General Assumption ◽  
Downstream Migration ◽  
Life Cycles ◽  
Hydropower Plant ◽  
Small Hydropower ◽  
Pit Tag ◽  
Safe Alternative ◽  
Hydropower Plants ◽  
Longitudinal Connectivity ◽  
Alternative Routes

Fish need to move upstream and downstream through rivers to complete their life cycles. Despite the fact that fishways are the most commonly applied solution to recover longitudinal connectivity, they are not considered viable for downstream migration. Therefore, alternative facilities are recommended to facilitate downstream migration. However, a few recent studies have disagreed with this general assumption, showing the potential for bidirectional movements. This study advances our understanding of the potential of fishways for downstream migration by studying their efficiency in a run-of-the-river hydropower plant in the Duero River (Spain). To achieve this, downstream movements of the Iberian barbel (n = 299) were monitored in a stepped fishway for two years with passive integrated transponder (PIT)-tag technology, considering the effect of fish origin and release zone. The results showed that 24.9% of barbels descended through the fishway, with the origin and release zone affecting the fishway location. In addition, downstream movements were observed throughout the whole year, except in winter. The study concludes that, under specific scenarios, fishways could act as safe alternative routes for downstream migration.

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