hydropower large Articles
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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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Forecasting monthly energy production of small hydropower plants in ungauged basins using grey model and improved seasonal index
A first-order one-variable grey model (GM(1,1)) is combined with improved seasonal index (ISI) to forecast monthly energy production for small hydropower plants (SHPs) in an ungauged basin, in which the ISI is used to weaken the seasonality of input data for the GM(1,1) model. The ISI is calculated by a hybrid model combining K-means clustering technique and ratio-to-moving-average method, ...
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The potential impacts of climate change on hydropower generation in Mid Wales
Hydropower is a potential large source of electricity supply in Wales. The Upper River Severn in Mid Wales is a typical stream where a high head hydropower scheme could be developed and the river system at Plynlimon has some of the longest records for weather and flow in Wales. A micro-hydropower potential of 99 kW is demonstrated at Plynlimon and the potential impacts of climate change are ...
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Hyporheic water exchange in a large hydropower-regulated boreal river – directions and rates
Widespread river regulation is known to modify river-aquifer interactions, influencing entire watersheds, but knowledge of the hyporheic flowpath along regulated rivers is limited. This study measured the hydraulic conductivity of the river bed and the aquifer, water levels and seepage fluxes in the heavily regulated Lule River in Northern Sweden, with the aim of characterising water exchange ...
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Control systems for small hydropower plants: a review
Hydropower is emerging as a major contributor to world energy requirement. It is inexhaustible, clean and has many other benefits like flood mitigation, water supply, irrigation, etc. However, large-scale hydropower generation suffers from inherent disadvantages, such as massive financial outlays, long gestation periods, geological surprises, environmental factors and rehabilitation of the ...
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Upcoming EU electricity and gas directives should be changed to support EU`s new energy and climate policies
It is important that the coming electricity and gas market directives ensures that renewable energy is given priority in the electricity and gas networks. This is both important when the energy is sold from local producers to the network and when the network is used for transport of energy from a renewable energy production unit to its owners. It applies to both electricity and gas networks, and ...
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Grounding Green Power: bottom-up perspectives on smart renewable energy policy in developing countries
Developing Countries in the Renewable Energy Transformation In order to meet the intensifying climate challenge, the global energy system must undergo a fundamental transformation, with a rapid increase of renewable energy worldwide. Developing countries are at the forefront of this challenge, since they are expected to add around 80 percent of all new electric generation capacity worldwide in ...
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Getting to 100% Renewable: Dream or Reality?
Attending the Future of Energy Summit last month, an annual event hosted by Bloomberg New Energy Finance, I was struck – for the second year running – by the rapid pace of cost reductions and innovation happening across the clean energy spectrum. With the news that a recent solar photovoltaics tender in Dubai obtained bids at less than US6c/kWh, to major investments in electricity ...
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Africa`s Hydropower Future
A gradual process of development has started yielding results for African hydropower, with a swathe of international hydro and associated power export projects under way or planned. It seems that Africa is becoming a more attractive place to invest in infrastructure development, but what has changed? It is well known that Africa has an abundance of hydropower resources, but it remains in ...
By HydroBox NV
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The right mix: the Philippines achieving its renewable energy goals
The global energy system is undergoing a transition from fossil fuels to renewable energy. There are clear signs that the pace of change is accelerating. 2009 was the second year in a row that more money was invested worldwide in renewable electricity generation projects than in fossil fuel-powered plants, according to data published by the United Nations. Developing countries, especially in ...
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The institutional co-evolution in diffusion of hydroelectric power technology
The introduction and significant momentum on diffusion of wind power as a new technology for energy production involve a push for changing the institutional framework in the energy sector. The introduction of hydro (electric) power technology and the following institutional change process may be compared to the introduction of wind power 90 years later. In this paper, the main focus is on the ...
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In Perspective: Launching a third industrial revolution
A third industrial revolution based on new communication and energy technologies needs strong political commitments, argues David Dickson. Just before Christmas, China's official Xinhua News Agency published an article extolling the virtues of the country's incoming premier, Li Keqiang, and describing his enthusiasm for ideas that the iconoclastic US commentator Jeremy Rifkin put forward in ...
By SciDev.Net
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Background: EU electricity and gas directives
3.rd Energy Market Package, proposed September 2007 September 2007 the EU Commission proposed a revision of the electricity and gas market directives with amendmets of the directives on electricity and gas markets and the directives on cross-border trade of electricity and gas. The main changes are that all countries must have independant regulators of the electricity and gas markets, that these ...
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World Wind Power Poised to Bounce Back after Slowing in 2013
At the end of 2013, the wind farms installed in more than 85 countries had a combined generating capacity of 318,000 megawatts, which would be enough to meet the residential electricity needs of the European Union’s 506 million people. New data from the Global Wind Energy Council show that wind developers built 35,000 megawatts of new generating capacity worldwide in 2013. This was down ...
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No Place Is Too Far
The remote location of hydropower stations is often a great challenge when major repair work is necessary. The refurbishment of a large generator in the Scottish Highlands shows how Sulzer finds cost-effective service solutions even in places miles from nowhere. Much of the UK hydroelectric capacity was built during the 1950s. These installations have performed extremely well, especially ...
By Sulzer Ltd.
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A Brief Look at Sustainable Energy Solutions
There’s been a lot of discussion around sustainable energy solutions over recent years. Governments and businesses are taking initiatives to undo the damage done from years of unabated use of fossil fuels. People are now desperate to adopt sustainable sources of energy. The governments and big businesses have jumped on board, too, as they realize that traditional energy sources aren’t ...
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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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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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Analysis of Development Course of Artificial Sand Making Technique
In the artificial sand and stone material production system, the sand making technology is one of the most important technologies, and the sand making equipment is the most equipment because the performance of the sand maker and the reasonability of the sand making technology influence the investment of the whole artificial sand and stone material processing system and the quality of the ...
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Website offers global view of small hydroelectric projects
It is now easier to access reliable data on small hydropower projects globally following the launch of a website designed to promote this technology, says a UN body. The UN Industrial Development Organization (UNIDO) and the International Center on Small Hydro Power (ICSHP), a China-based, non-profit body that promotes this form of energy worldwide, launched the site last month (13 February). ...
By SciDev.Net
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