scholarly journals TINJAUAN POTENSI TEKNIS DAN KELAYAKAN EKONOMI PLTA PADA PROYEK KERJA SAMA PEMERINTAH DENGAN BADAN USAHA BENDUNGAN MERANGIN

2021 ◽  
Vol 17 (2) ◽  
pp. 95-110
Author(s):  
Agustia Larasari ◽  
Jessica Sitorus ◽  
Moh. Bagus Wiratama Asad ◽  
Ary Firmana
Keyword(s):  
Economic Value ◽  
Peak Load ◽  
Average Power ◽  
Economic Feasibility ◽  
Hydropower Plant ◽  
Electricity Production ◽  
Hydropower Plants ◽  
Technical Potential ◽  
Power And Energy ◽  
Multipurpose Dam

One of the utilizations of a multipurpose dam that has socio-economic value during its operation iselectricity generation. The addition of a hydropower component to a PPP project is quite a challenge due to substantial uncertainty related to hydrological aspects that will impact electricity production and revenue, as well as high initial investment costs for generating units. This study aims to map the technical potential of hydropower and evaluate the economic feasibility of hydropower in the Merangin Dam PPP Project. The potential for power and energy generation is obtained through simulations of the hydropower operation for 19 years using hydrological data, HEC-HMS model generated-data, and dam engineering design. According to the results, the technical potential of hydropower can produce, on average, power of Pp = 103.8 MW during peak load, Pb = 98.53 MW during base load, and total energy of 636.66 GWh/year. The economic potential is evaluated through social cost-benefits analysis (SCBA) by estimating the additional benefits obtained from the hydropower compared to the PPP structure of the Merangin Dam without hydropower. Through SCBA, the addition of hydropower to the Merangin Dam PPP structure has an EIRR value of 35.24%, NPV of Rp. 2.104.212.122.723,- and BCR = 3.06. Based on these indicators, the provision of hydropower plants is considered economically feasible because the benefits that will be generated and obtained by the community are higher than the economic costs incurred.Keywords: Technical potential, economic feasibility, hydropower plant, multipurpose dam, PPP

scholarly journals Progress for On-Grid Renewable Energy Systems: Identification of Sustainability Factors for Small-Scale Hydropower in Rwanda

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 826
Author(s):  
Geoffrey Gasore ◽  
Helene Ahlborg ◽  
Etienne Ntagwirumugara ◽  
Daniel Zimmerle
Keyword(s):  
Secondary Data ◽  
Hydropower Plant ◽  
Low Flow ◽  
Electricity Production ◽  
Annual Rainfall ◽  
Maintenance Cost ◽  
Small Scale ◽  
Factors Affecting ◽  
Hydropower Plants ◽  
Generation Capacity

In Rwanda, most small-scale hydropower systems are connected to the national grid to supply additional generation capacity. The Rwandan rivers are characterized by low flow-rates and a majority of plants are below 5 MW generation capacity. The purpose of this study is to provide a scientific overview of positive and negative factors affecting the sustainability of small-scale hydropower plants in Rwanda. Based on interviews, field observation, and secondary data for 17 plants, we found that the factors contributing to small-scale hydropower plant sustainability are; favorable regulations and policies supporting sale of electricity to the national grid, sufficient annual rainfall, and suitable topography for run-of-river hydropower plants construction. However, a decrease in river discharge during the dry season affects electricity production while the rainy season is characterized by high levels of sediment and soil erosion. This shortens turbine lifetime, causes unplanned outages, and increases maintenance costs. Further, there is a need to increase local expertise to reduce maintenance cost. Our analysis identifies environmental factors related to the amount and quality of water as the main current problem and potential future threat to the sustainability of small-scale hydropower. The findings are relevant for energy developers, scholars, and policy-makers in Rwanda and East Africa.

scholarly journals An Improved Techno-Economic Approach to Determination of More Precise Installed Parameter for Small Hydropower Plants

Water ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2419
Author(s):  
Vidosava Vilotijević ◽  
Uroš Karadžić ◽  
Radoje Vujadinović ◽  
Vuko Kovijanić ◽  
Ivan Božić
Keyword(s):  
Net Present Value ◽  
Design Flow ◽  
Hydropower Plant ◽  
Electricity Production ◽  
Small Hydropower ◽  
A Value ◽  
Hydropower Plants ◽  
Wide Range ◽  
Installed Capacity

Designing a small hydropower plant (SHPP) necessitates fulfillment of energy and ecological constraints, so a well-defined design flow is of the utmost significance. The main parameters of each SHPP are determined by appropriate techno-economic studies, whereas an improved approach to defining more precise SHPP installed parameter is presented in this paper. The SHPP installed parameter is the ratio of the design flow and averaged perennial flow obtained from the flow duration curve at the planned water intake location. Previous experiences in the design of SHPPs have shown that the SHPP installed parameter has a value in a wide range without the existence of an unambiguous equation for its determination. Therefore, with this aim, the thirty-eight (38) small watercources in the territory of Montenegro, denominated for the construction of SHPPs, have been investigated. SHPPs are divided into two groups depending on the installed capacity and the method of calculating the purchase price of electricity. For both groups, the range of SHPP installed parameter is determined according to the technical and economic criteria: the highest electricity production, the highest income, net present value (NPV), internal rate of return (IRR), and payback period (PB).

scholarly journals Possibility of the modelling of electricity production from hydropower

2019 ◽  
Vol 86 ◽  
pp. 00008 ◽  
Author(s):  
Agnieszka Operacz ◽  
Bartosz Szeląg ◽  
Mads Grahl-Madsen
Keyword(s):  
Hybrid Model ◽  
Point Of View ◽  
Hydropower Plant ◽  
Electricity Production ◽  
Support Vector ◽  
Secondary Importance ◽  
Hydropower Plants ◽  
The Future ◽  
Maintenance Work ◽  
Opposite Situation

In hydropower plants benefits depends on available flow. The paper presents a hybrid model for forecasting the operation of a hydropower plant, including the production of electricity. The possibility of mathematical modeling was chosen to show connections between observed in the past hydrological conditions (available flow) and energy deliver in the future. The available flow which is not enough for start turbines was forecasting by logistic regression model. The opposite situation when the flow starts turbine to produce energy, regression models (the support vector machines SVM, random forest RF, k nearest neighbour k-NN) were used. Results from hybrid model were compared with chosen data-mining methods. The possibility of forecasting of the length of periods when hydropower plant will be working could be very useful. It provides the prognosis of energy value which could be produced from hydropower plant. From the investors’ point of view the economic justification for the execution of the project based on the future energy producing could be a main criteria to realize or buy/sell hydropower plant. Also the secondary importance could be a possibility of planning review and maintenance work. Knowledge of power plant working periods could be a base for assessing a potential production from hydropower plant.

scholarly journals The Benefits of Variable Speed Operation in Hydropower Plants Driven by Francis Turbines

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3719 ◽  
Author(s):  
Edson Bortoni ◽  
Zulcy de Souza ◽  
Augusto Viana ◽  
Helcio Villa-Nova ◽  
Ângelo Rezek ◽  
...  
Keyword(s):  
Climate Change ◽  
Economic Feasibility ◽  
Hydropower Plant ◽  
Variable Speed ◽  
Constant Frequency ◽  
Hydropower Plants ◽  
Water Head ◽  
Frequency Grid ◽  
Theoretical Analyses ◽  
Hydro Turbines

Climate change and environmental degradation has resulted in a reduction in water inflow at hydropower plants, as well as a decrease in reservoir levels. Existing hydropower plants suffer from water head reduction, mainly with decrease in efficiency of energy conversion in hydro turbines. This paper showcases the benefits of operations with variable speed in existing hydropower plants, when working at a lower water head than the rated one. Theoretical analyses and tests were performed in a special constructed laboratorial setup aiming at evaluating the amount of efficiency recovery with variable speed operation. Connection alternatives for a constant frequency grid and applications of the learned concepts in an existent hydropower plant are presented. The investigations were applied to the Furnas hydropower plant. The results point out that economic feasibility of the application can be achieved.

scholarly journals The water footprint from hydroelectricity: a case study for a hydropower plant in Romania

2019 ◽  
Vol 85 ◽  
pp. 06012
Author(s):  
Lăcrămioara Diana Robescu ◽  
Dana Andreya Bondrea
Keyword(s):  
Water Consumption ◽  
Water Footprint ◽  
Integrated Management ◽  
Economic Value ◽  
Energy System ◽  
Hydropower Plant ◽  
Electricity Production ◽  
Management Approach ◽  
Raising Awareness

In Romania, the hydropower is the main form of renewable source with an important share in energy mix. Despite their valuable advantages on supplying energy and balancing the energy system, public acceptance, environmental, social and economic impact has become a common challenge in development of hydropower projects. Increasing of water consumption and raising awareness regarding available water resources leads to an integrated management approach of them. In this paper the water footprint is estimated for one of the largest Romanian hydropower project, namely Hydropower Plant Vidraru. The water footprint from hydroelectricity is evaluated considering electricity production of the hydropower plant, water footprint of dam construction and three different approaches to quantify water footprint of the reservoir: gross water consumption, net water consumption and water balance. Also, water footprint is assessed based on economic value of the reservoir using allocation coefficients for various purposes of the reservoir. It is estimated that economic benefit of the reservoir is 81.92·106 €/y, with hydroelectricity major contributor.

scholarly journals Water footprint of the Sobradinho hydropower plant, Northeastern Brazil

2018 ◽  
Vol 13 (3) ◽  
pp. 1 ◽  
Author(s):  
Nayara Paula Andrade Vieira ◽  
Eduardo De Oliveira Bueno ◽  
Silvio Bueno Pereira ◽  
Carlos Rogério de Mello
Keyword(s):  
Water Footprint ◽  
Average Power ◽  
Electric Energy ◽  
Northeastern Brazil ◽  
Hydropower Plant ◽  
Important Indicator ◽  
Average Value ◽  
Hydropower Plants ◽  
Flooded Area ◽  
Historical Variation

Hydroelectricity is responsible for the greatest fraction of the electric energy generated in Brazil. The water footprint of hydropower plants (WFP) is an important indicator of the sustainable and efficient use of water resources. In this context, WFP of the Sobradinho Hydropower Plant was determined for the period from 2003 to 2012, taking into account the reservoir’s historical variation for the flooded area. To accomplish this, monthly series of electric energy production, flooded area, evaporation and evapotranspiration rates were used. Average gross and net evaporation were 2,031 and 1,577 mm year-1, respectively. The average power generation of this facility in the analyzed period was 462 MW, and the flooded area of its reservoir presented an average value of 3,054 km². Based on the monthly data, the gross and net water footprints were, respectively, 417 and 325 m³ GJ-1. Based on these results, it can be concluded that the changes in the reservoir’s area exert direct and important influence on the WFP estimates of the Sobradinho hydropower plant. The WFP estimates in this study were different from other studies that adopted a constant value of 4,214 km² for this reservoir’s area, which is taken based on the normal water level of the plant operation.

scholarly journals Prospects of Storage and Pumped-Storage Hydropower for Enhancing Integrated Nepal Power Systems

2014 ◽  
Vol 15 ◽  
pp. 37-41 ◽  
Author(s):  
Neeraj Kumar Sah ◽  
Madhab Uprety ◽  
Sangharsha Bhandari ◽  
Prativa Kharel ◽  
Saurav Suman ◽  
...  
Keyword(s):  
Power Systems ◽  
Power System ◽  
Power Plants ◽  
Peak Load ◽  
Electrical Energy ◽  
Hydropower Plant ◽  
Hydropower Plants ◽  
Pumped Storage ◽  
Electrical Demand ◽  
Installed Capacity

An Integrated Power System (IPS) should have electrical energy generating plants for base load (e.g., nuclear and thermal plants) and peak load (e.g., hydropower plants) so that they can work in coordination in such a way that the demand is met in time. In Nepal, the Integrated Nepal Power System (INPS) is a hydro-dominated system where the base and intermediate power demands are covered primarily by run-of-river hydropower plants and the peak demand by seasonal storage and several diesel power plants of lower capacity. The INPS should have sufficient natural storage and forced storage power plants to improve the system’s reliability. On top of that, daily peak electrical demand could also be adequately covered by demand-side management, using a pumped-storage hydropower plant that can employ a system’s surplus energy during low demand period for pumping. To rectify this extreme imbalance of installed capacity in Nepal, this paper explores the prospect of storage and pumped-storage power plants for enhancing INPS. A case study of Rupa-Begnas pumped-storage hydropower is highlighted for these purposes.DOI: http://dx.doi.org/10.3126/hn.v15i0.11290HYDRO Nepal JournalJournal of Water, Energy and EnvironmentVolume: 15, 2014, JulyPage: 37-41 

scholarly journals Retention basin with Golesti SHPP downstream dam for mitigating hydropeaking and producing green electricity

2019 ◽  
Vol 85 ◽  
pp. 06011
Author(s):  
Bogdan Popa ◽  
Florica Popa ◽  
Eliza Isabela Tică ◽  
Angela Neagoe ◽  
Mihaela Amalia Diminescu
Keyword(s):  
Peak Load ◽  
Hydropower Plant ◽  
Small Hydropower ◽  
Green Electricity ◽  
Flow Fluctuations ◽  
Hydropower Plants ◽  
Retention Basin ◽  
The Subject ◽  
Maximum Flows ◽  
Positive Effect

Hydropeaking is due to the intermittent operation of peak hydropower plants and leads to various and complex problems downstream. A solution to solve part of them is to provide the development scheme with a retention basin downstream the hydropower plant (HPP). The water used intermittently during the day / week to produce electricity at peak load, which leads to sudden variation of flows into the riverbed will be regulated in this reservoir. Irrespective of the program that the HPP has during the day, the retention basin gathers the water and evacuates it downstream as much as possible constantly during the day or, at least, attenuates the sudden variation, increase or decrease, of levels downstream. Thus, the maximum flows evacuated by the HPP can be dramatically reduced as well as the flow fluctuations and the river levels accordingly. If the flow downstream the retention basin is almost constant during the day and it is released through a small hydropower plant, the positive effect of this reservoir on hydropeaking is combined with the production of green electricity. The subject of this paper is to roughly analyse the possibility to build a retention basin downstream Golesti HPP by means of weir and contour dams, if the case may be, and to release the water constantly or with smooth fluctuations, via one or two turbines, a small hydropower plant, producing green electricity without further harming the riverbed and the ecosystem downstream the weir.

Role of micro-hydropower plants in socio-economic development of rural Afghanistan

2020 ◽  
pp. 1-7
Author(s):  
Mohammad Airaj Firdaws Sadiq ◽  
Najib Rahman Sabory ◽  
Mir Sayed Shah Danish ◽  
Tomonobu Senjyu
Keyword(s):  
Distribution System ◽  
Energy Demand ◽  
Economic Life ◽  
Hydropower Plant ◽  
Decent Work ◽  
Hydropower Plants ◽  
Development Goals ◽  
The Government ◽  
Decentralized Energy ◽  
Energy Options

Afghanistan hosts the Hindu Kush, an extension of the Himalaya mountains that act as water sources for five major rivers flowing through Afghanistan. Most of these rivers provide promise for the construction of water dams and installment of micro hydropower plants (MHP). Although civil war and political strife continue to threaten the country for more than four decades, the Afghan government introduced strategic plans for the development of the country. In 2016 Afghanistan introduced the Afghanistan National Peace and Development (ANPD) Framework at Brussels de-signed to support Afghanistan’s progress towards achieving the SDGs (Sustainable Development Goals). This study discussed the 7th Goal (ensuring access to affordable, reliable, and sustainable energy for all) and 8th Goal (promoting sustained, inclusive and sustainable economic growth, full and productive employment and decent work for all) alignment in Afghanistan. The Afghan gov-ernment acknowledges its responsibility to provide electricity for all of its citizens, but this can only be achieved if the government can secure a reliable source of energy. Afghanistan’s mountainous terrain provides a challenge to build a central energy distribution system. Therefore this study looks for alternative solutions to the energy problems in Afghanistan and explores feasibility of micro-hydropower plant installations in remote areas. This study evaluated socio-economic im-pacts of micro-hydropower plants in the life of average residents. We focused on one example of a micro hydropower plant located in Parwan, conducted interviews with local residents, and gath-ered on-site data. The findings in this study can help policymakers to analyze the effects of devel-opment projects in the social and economic life of residents. It will encourage the government and hopefully the private sector to invest in decentralized energy options, while the country is facing an ever-growing energy demand.

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