scholarly journals Run-of-the-River Hydro-PV Battery Hybrid System as an Energy Supplier for Local Loads

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 5160
Author(s):  
Dariusz Borkowski ◽  
Dariusz Cholewa ◽  
Anna Korzeń
Keyword(s):  
Hybrid System ◽  
Power Plants ◽  
River Flow ◽  
Hydropower Plant ◽  
Construction Time ◽  
Hydro Power ◽  
Local Loads ◽  
Energy Deficiency ◽  
Hydropower Plants ◽  
Hydro Power Plants

Hybrid hydro energy systems are usually analysed with pumped hydro storage systems, which can facilitate energy accumulation from other sources. Despite the lack of water storage, run-of-the-river hydropower plants are also attractive for hybrid systems owing to their low investment cost, short construction time, and small environmental impact. In this study, a hybrid system that contains run-of-the-river small hydro power plants (SHPs), PV systems, and batteries to serve local loads is examined. Low-power and low-head schemes that use variable-speed operation are considered. The novelty of this study is the proposal of a dedicated steady-state model of the run-of-the-river hydropower plant that is suitable for energy production analysis under different hydrological conditions. The presented calculations based on a real SHP of 150 kW capacity have shown that a simplified method can result in a 43% overestimation of the produced energy. Moreover, a one-year analysis of a hybrid system operation using real river flow data showed that the flow averaging period has a significant influence on the energy balance results. The system energy deficiency and surplus can be underestimated by approximately 25% by increasing the averaging time from day to month.

scholarly journals The influence of water resources on transformation of spatial-functional structure of the territory of the municipality of Mali Zvornik and the possibilities for the construction of new hydro power plants

2010 ◽  
Vol 90 (3) ◽  
pp. 189-206 ◽  
Author(s):  
Mila Pavlovic ◽  
Rajko Golic ◽  
Dejan Sabic
Keyword(s):  
Water Resources ◽  
Power Plants ◽  
Hydraulic Engineering ◽  
Functional Structure ◽  
Hydropower Plant ◽  
Small Scale ◽  
Hydro Power ◽  
Hydropower Plants ◽  
Economic Revitalization ◽  
Hydro Power Plants

The territory of the municipality of Mali Zvornik is, from the aspect of morphology and spatial-functional structure, a heterogeneous area. It is located in the valley of the Drina River and in hilly-mountainous part of Podrinjske mountains. The area of the municipality is 184 km?, with 14076 inhabitants (2002). The importance of water resources for the development of the municipality, particularly of the hydropower plant (HPP) ?Zvornik?, is analyzed in this paper. Inadequate use of hydro-energetic potential, possibilities for construction of new hydropower plants and economic reasons for their construction are also emphasized. The priorities of the development of hydraulic engineering are defined in relation to morphological and hydrological conditions. They refer to increase of power of the HPP ?Zvornik? and construction of small-scale hydropower plants in hilly-mountainous part of municipality. Considering depopulation processes in the villages of Mali Zvornik, hydraulic engineering, together with agriculture, forestry, exploitation of mineral goods and tourism, can be one of the factors of demographic and economic revitalization of this area.

scholarly journals Effect of Hybrid Resources on Management Outcomes Micro-Hydro Power Plants in Remote Areas

2020 ◽  
Vol 15 (6) ◽  
pp. 855-864
Author(s):  
Muhammad Yusan Naim ◽  
Henny Pramoedyo ◽  
Nuddin Harahab ◽  
Syarifuddin Nodjeng ◽  
Sudirman Syam
Keyword(s):  
Latent Variables ◽  
Latent Variable ◽  
Power Plants ◽  
Structural Model ◽  
Electrical Power ◽  
Hydro Power ◽  
Remote Areas ◽  
Manifest Variable ◽  
Hydropower Plants ◽  
Hydro Power Plants

The effect of developing hybrid resources on the management outcomes of micro-hydropower plants in remote areas has been studied and analyzed. The hybrid resource is a combination of two energy sources, such as water and solar energy, that operate together in meeting the needs of electrical power in Ambava Village, Tinondo Sub-district, East-Kolaka Regency, Southeast Sulawesi Province. This study has used a management model describing the relationship and influence of latent variables and their manifestation variables. Here, Confirmatory Factor Analysis (CFA) based Common-Pool-Resources (CPR) is the proper method of testing the structural model used. The results show that the Critics-Ratio (CR) and Standard Loading Factor (SLF) have fulfilled the expected value. The direct influence of the variable exogenous hybrid resources to the endogenous variable outcome of 0.213 has fulfilled the Gold of Fit criteria. Then, the direct impact of the most dominant latent variable is the operating dimension of the resource. At the same time, the indirect effect on the manifest variable is the increase in electricity reserve. Furthermore, the most dominant indirect impact of the hybrid resources latent variable is the benefit and cost dimensions, while the most dominant manifest variable is people's welfare savings.

scholarly journals Environmental threats of build mini-plant cascade in the river Cheremosh

2014 ◽  
pp. 403-407
Author(s):  
Y. Ilchyshyn
Keyword(s):  
Power Plants ◽  
Water Environment ◽  
Benthic Organisms ◽  
Small Hydropower ◽  
Hydro Power ◽  
Environmental Threats ◽  
Environmental Threat ◽  
Hydropower Plants ◽  
Hydro Power Plants ◽  
Water Plants

The article coverage the development issues Carpathian cascade mini-hydro-plants for example basin Cheremosh. It was the influence of existing hydro power plants in natural (water) environment and proved inappropriate, unprofitable and environmental threat. Available mini water plants violate hydrologic regime (water content of the river) and stimulates the development of erosion-accumulative processes, endangered species and benthic organisms integral component of aquatic ecosystems. Operation of small hydropower plants also contributes to shallowing of rivers and creation of artificial barriers for migration and gene pool exchange between populations of aquatic animals. The construction of mini hydro cascade prevents alloys of the river (rafting). In addition there is a threat of ecological security of the region and the development tourism and recreation, social and economic potential of the basin, the Cheremosh. Key words: mini-hydro, river Cheremosh, water quality, environmental hazards, hydrology, hydroecology.

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 Effect of Symmetrically Switched Rectifier Topologies on the Frequency Regulation of Standalone Micro-Hydro Power Plants

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3201
Author(s):  
Henry Bory ◽  
Jose L. Martin ◽  
Iñigo Martinez de Alegria ◽  
Luis Vazquez
Keyword(s):  
Power Factor ◽  
Power Plants ◽  
Reactive Power ◽  
Alternating Current ◽  
Frequency Regulation ◽  
Hydro Power ◽  
Major Energy Source ◽  
Hydro Power Plants ◽  
Electronic Load ◽  
Ac Converters

Micro-hydro power plants (μHPPs) are a major energy source in grid-isolated zones because they do not require reservoirs and dams to be built. μHPPs operate in a standalone mode, but a continuously varying load generates voltage unbalances and frequency fluctuations which can cause long-term damage to plant components. One method of frequency regulation is the use of alternating current-alternating current (AC-AC) converters as an electronic load controller (ELC). The disadvantage of AC-AC converters is reactive power consumption with the associated decrease in both the power factor and the capacity of the alternator to deliver current. To avoid this disadvantage, we proposed two rectifier topologies combined with symmetrical switching. However, the performance of the frequency regulation loop with each topology remains unknown. Therefore, the objective of this work was to evaluate the performance of the frequency regulation loop when each topology, with a symmetrical switching form, was inserted. A MATLAB® model was implemented to simulate the frequency loop. The results from a μHPP case study in a small Cuban rural community called ‘Los Gallegos’ showed that the performance of the frequency regulation loop using the proposed topologies satisfied the standard frequency regulation and increased both the power factor and current delivery capabilities of the alternator.

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