hydropower reservoir Articles
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A Fokker–Planck–Kolmogorov equation approach for the monthly affluence forecast of Betania hydropower reservoir
This paper presents a finite difference, time-layer-weighted, bidirectional algorithm that solves the Fokker–Planck–Kolmogorov (FPK) equation in order to forecast the probability density curve (PDC) of the monthly affluences to the Betania hydropower reservoir in the upper part of the Magdalena River in Colombia. First, we introduce a deterministic kernel to describe the basic dynamics of the ...
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3D CFD modelling of velocities and sediment transport in the Iffezheim hydropower reservoir
The simulation of sediment transport by three-dimensional (3D) modelling is linked with the question of how accurate such models are. The current paper provides a test where detailed field measurements of velocities and bed elevation changes over a 3-month period from a prototype reservoir are compared with simulation results. The SSIIM software was used to compute water flow and sediment ...
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Factsheet: Hydropower and ecology
Accounting for 20% (around 3,400 TWh) of global electricity production – even though its contribution to gross final energy consumption is only about 2% – hydropower plays a vital role. This is largely due to the fact that it can be readily regulated to meet fluctuations in demand and substantial reserves can be stored in reservoirs. Hydropower supplies around 56% of Switzerland's ...
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Large-scale hydropower system optimization using dynamic programming and object-oriented programming: the case of the Northeast China Power Grid
This paper examines long-term optimal operation using dynamic programming for a large hydropower system of 10 reservoirs in Northeast China. Besides considering flow and hydraulic head, the optimization explicitly includes time-varying electricity market prices to maximize benefit. Two techniques are used to reduce the ‘curse of dimensionality’ of dynamic programming with many ...
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Renewable energy can benefit from a changing climate
A warmer and wetter climate may have positive feedback on renewable energy sources. Better conditions for hydropower and biomass energy can be expected. A new analysis has been performed by Nordic and Baltic researchers. The Nordic Council of Ministers has published a new report on the impacts of 21st century climate changes on the development and use of renewable energy in the Nordic and Baltic ...
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Short-term hydro thermal generation scheduling using modified invasive weed optimisation algorithm
This paper presents a radical methodology to find the solution of optimal short-term hydrothermal generation scheduling problem using modified invasive weed optimisation algorithm (MIWOA). The hydrothermal system is highly non-linear and non-convex due to its constraints, making the optimal scheduling difficult. In this paper, a modified invasive weed optimisation algorithm with parallel ...
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The impacts of organic matter on the distribution and methylation of mercury in a hydroelectric reservoir in Wujiang River, Southwest China
In order to understand the impacts of organic matter on geochemical process of Hg in hydroelectric reservoir, spatial and seasonal distributions of total mercury (THg) and methylmercury (MeHg) both in solid and liquid phases of sediment cores were investigated in Wujiangdu Reservoir (WJD) in Guizhou province, China. Four sampling sites with different intensities of cage aquaculture activities ...
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Let’s get flexible - Pumped storage and the future of power systems
Pumped storage hydropower has proven to be an ideal solution to the growing list of challenges faced by grid operators. As the transition to a clean energy future rapidly unfolds, this flexible technology will become even more important for a reliable, affordable and low carbon grid, write IHA analysts Nicholas Troja and Samuel Law. "Anything that can go wrong will go wrong". That old adage, ...
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Extended multi-objective firefly algorithm for hydropower energy generation
Classical methods have severe limitations (such as being trapped in local optima, and the curse of dimensionality) to solve optimization problems. Evolutionary or meta-heuristic algorithms are currently favored as the tools of choice for tackling such complex non-linear reservoir operations. This paper evaluates the performance of an extended multi-objective developed firefly algorithm ...
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Trung Son hydropower project : overview and update
Trung Son is a $411.57 million medium-sized hydropower and development project located in Northwest Vietnam that will supply least-cost electric power for domestic consumption in an environmentally and socially sustainable manner and will contribute to improvements in dam safety in the power sector in Vietnam. The project will also contribute to the climate change agenda in Vietnam by avoiding ...
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A conceptual framework for real time estimation of WFP for small hydroelectric power plant
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 ...
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An assessment of reservoir filling policies for the Grand Ethiopian Renaissance Dam
Africa's largest hydropower facility is currently under construction on the main stem of the Blue Nile River in Ethiopia. The Grand Ethiopian Renaissance Dam (GERD) is poised to facilitate regional development with a 63 billion cubic meter reservoir and 6,000 MW of power generating capacity. To date, however, no reservoir filling rate policy has been established. This policy will have ...
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Evaluation of precipitation forecasts from NOAA global forecast system in hydropower operation
Forecasts of 10-day average inflow into the Ertan hydropower station of the Yalong river basin are needed for seasonal hydropower operation. Medium-range inflow forecasts have usually been obtained by Auto-Regressive-Moving-Average (ARMA) models, which do not utilize any precipitation forecasts. This paper presents a simple GFS-QPFs-based rainfall - runoff model (GRR) using the 10-day accumulated ...
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