Showing results for: hydropower generation Articles
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A method for the study of cascading effects within lifeline networks
The following research is in keeping with the current international and national trend to establish effective facility management plans, based on antagonistic notions of maximal production and minimal risks. The application of this approach to lifeline networks is complex, considering that the failure of these networks can cause extensive consequences for populations and upon socio-economic ...
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Risk sharing in hydropower development: case study of the Chukha Hydel Project in Bhutan
The Himalayan rivers have an enormous hydropower potential that is still not exploited fully for the benefit of the region. Bhutan and Nepal together have an economically feasible potential of 60,000 MW of hydroelectric power generation capacity but are too weak financially to bear the risks associated with the development of their hydro resources alone. India is the only potential market for ...
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Data Highlight: Hydropower Continues Steady Growth
World hydroelectric power generation has risen steadily by an average 3 percent annually since 1965. In 2011, at 3,500 billion kilowatt-hours, hydroelectricity accounted for roughly 16 percent of global electricity generation, almost all produced by the world’s 45,000-plus large dams. Graph on World Hydroelectric Generation, 1965-2011 Four countries dominate the hydropower landscape: ...
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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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Developing reservoir operational decision rule by genetic programming
The reservoir operational decision rule is an equation that can balance reservoir system parameters in each period by considering previous experiences of the system. That equation includes variables such as inflow, volume storage and released water from the reservoir that are commonly related to each other by some constant coefficients in predefined linear and nonlinear patterns. Although ...
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Optimizing multi-reservoir operation rules: an improved HBMO approach
We present an improved version of Honey Bees Mating Optimization (HBMO) algorithm to develop operating rules for multi-reservoir systems. The performance of the proposed model is tested through sensitivity analysis and comparing the result with those of a real-coded Genetic Algorithm (GA) for a 60-month period single-reservoir operation problem. The improved model is subsequently employed to ...
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Long-term variations in the net inflow record for Lake Malawi
Lake Malawi is the third largest lake in Africa and plays an important role in water supply, hydropower generation, agriculture and fisheries in the region. Lake level observations started in the 1890s and anecdotal evidence of variations dates back to the early 1800s. A chronology of lake level and outflow variations is presented together with updated estimates for the net inflow to the ...
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Climate change and the US energy sector
As President Obama emphasized in his speech at Georgetown University in June 2013, climate change is happening. It is here, it is now, and as Obama warned, “Our planet is changing in ways that will have profound impacts on all of humankind.” But what are these effects? The President reels off examples: sea levels in New York harbour increasing by a foot in depth over the past century, ...
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Curtis hydro redevelopment - Case study
The Curtis Palmer hydro facility consists of two run-of-river hydroelectric generating stations located on the Hudson River, in Corynth, NY. In 2014, CHC provided two 2250 mm vertical axial flow Kaplan open flume turbines to replace two of the five horizontal units located in the Curtis powerhouse, which were running but in poor mechanical condition. The existing generators were removed, ...
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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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Air Source Heat Pump Installation in Neath, Port Talbot - Case Study
Aberdulais Falls in the Neath Valley, South Wales is an important industrial heritage site owned and run by the National Trust. For over 400 years these falls provided the energy to drive the wheels of industry, from the manufacture of copper in 1584 to the later tinplate works. A recent major refurbishment of the water wheel gave scope for implementing the latest hydraulic technology to improve ...
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Coal Prices held back for power producers in China
China requests that coal miners not raise prices Higher coal prices would increase price of inflation on all things in China, so the Govt. has asked that the Coal Companies keep prices from rising too much… The prices for coal set by annual supply contracts cannot be changed. All of the state run coal mine operators and coal industry leaders will work together coal prices steady. The ...
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Boba and Las aarias hydro - Case study
The Canal Boba and Las Barias Hydro projects were developed by the local Dominican utility with the Montreal engineering firm of Dessau Soprin. CHC provided two identical water-to-wire equipment packages, each including a 1250 mm axial flow Kaplan turbine, 900 kW/450 RPM synchronous generator hydraulic power unit and switchgear, controls and protection package. The projects were commissioned ...
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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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Livermore Falls Hydro - Case study
Located on the Androscoggin River in Maine, the Livermore Falls hydro project required the installation of a turbine unit that would meet government minimum flow requirements on the river. CHC provided a water-to-wire equipment package which included a 1500 mm axial flow propeller turbine along with generator, hydraulic power unit, switchgear and controls to comply with the minimum flow ...
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Higley generating station - Case study
The Higley generating station was built in 1913 and is located on the Raquette River in the State of New York. The original plant contained threeFrancis turbines producing just over 4 MW of power. In 2002, a new plant was constructed next to the existing plant, for which CHC provided four 1500 mm axial flow turbines – two propeller and two Kaplan. The existing units remained in service ...
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VSC with zigzag transformer based electronic load controller for a stand-alone power generation
This paper presents a novel configuration of a voltage and frequency (VF) controller for a stand-alone pico hydro power generating system employing an asynchronous generator (IAG). The proposed VF controller is an electronic load controller (ELC), which consists of a three leg insulated gate bipolar junction transistor (IGBT) based voltage source converter (VSC), a DC chopper and an auxiliary ...
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The blue water footprint of electricity from hydropower
Hydropower accounts for about 16% of the world’s electricity supply. It has been debated whether hydroelectric generation is merely an in-stream water user or whether it also consumes water. In this paper we provide scientific support for the argument that hydroelectric generation is in most cases a significant water consumer. The study assesses the blue water footprint of hydroelectricity ...
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Voltage source converter with a transformer as an electronic load controller for a stand-alone power generation
This paper presents a new configuration of a voltage and frequency controller for a stand alone pico hydro power generating system employing an Isolated Asynchronous Generator (IAG). The proposed controller is an Electronic Load Controller (ELC), which consists of a three leg IGBT (Insulated Gate Bipolar Junction Transistor) based Voltage Source Converter (VSC), a DC chopper and an auxiliary load ...
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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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