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- Category: Articles
A Case Study
Based on a real case study, this article addresses the issues that can be encountered during project planning when a wind resource assessment programme (WRAP) is not adequately designed. The study highlights the uncertainty induced by vertical and horizontal extrapolation of the wind resource. The impact of these parameters on energy production is demonstrated based on simulations using commercial wind resource models. The resulting conclusions highlight the importance of well-designed WRAPs. The experience, results, benefits and challenges of sodar (sound detection and ranging) use are briefly reviewed in the context of the complex terrain and operating conditions of Canada. Limitations encountered by numerical models (steady state wind flow model, CFD model) are also examined in a comparative case study.By Bouaziz Ait-Driss, Francis Pelletier, Milena Dimitrijevic and Christophe Sibuet-Watters, Helimax Energy, Canada
- Category: Articles
A New Option for Wind Integration?
This article presents a recent analysis of wind energy integration into the electricity systems of Germany and Austria. It raises the question of whether flexible demand can provide cheap balancing options to fulfil the growing need for balancing capacity. The main focus is on the interaction of wind power production and flexible demand to im-prove the total system efficiency. Detailed simulations of wind power production and power plant operation are used to quantify additional reserve power, which, next to grid extension, is the main issue concerning the integration of wind energy. An assessment of demand response potentials provided evidence that the costs of additional reserve power could be reduced and that demand response can be a valuable option for inte-grating wind power into electricity systems.
By Marian Klobasa, Fraunhofer Institute for Systems and Innovation Research, Germany
- Category: Articles
Reconciling a conflict between wind turbines and radio systems
Renewable energy is at the heart of government policy in most western countries as global warming and its causes rise to the top of political and public agendas.? At the same time, the public demand for further growth in communications and more mobility seems as insatiable as increased demand for energy.? But within these public aspirations lies a dilemma: wind turbines, the major source of growth in renewable energy, cause interference to radio communications upon which many telecommunication services depend.? Can these conflicts be resolved?? Radio engineers, recognising the importance of both renewable energy and radio communications are seeking ways to reconcile this conflict.By Adrian Grilli, the Joint Radio Company Ltd, UK
.- Category: Articles
Assessing the Costs and Possibilities
At the present time 65% of Sri Lanka's electricity is generated by fossil fuels. In this situation, utilisation of renewable energy for electricity generation is very important to mitigate economic and environmental impacts. Wind energy has been identified as one of the more promising renewable energy sources that could generate electricity in Sri Lanka. However, it will be necessary to improve the quality and accessibility of renewable energy resource data before large-scale wind energy technologies can be developed locally. At present, ground wind measurements are not sufficient to accomplish a comprehensive wind resource assessment in Sri Lanka. For this reason, a high-resolution wind map has been developed by the US National Renewable Energy Laboratory. In this article, cost of wind power generation in various parts of Sri Lanka is discussed and compared to the existing power purchasing tariff system in the country.By Mahinsasa Narayana, National Engineering Research & Development Centre, Sri Lanka
.- Category: Articles
A Vision for Creating a More Powerful Europe
Airtricity is proposing the development of the Supergrid. This project consists of a series of interconnected offshore wind farms throughout the seas of Europe. It would be commonly owned by all European states, with the wind farms dispersed across a wide geographic area, ranging from the Baltic Sea to the Mediterranean and Atlantic. This broad arrangement could smooth out any intermittency of supply by capturing the wind and transmitting power from one end of the grid to the other to feed into national grids. In the event of the wind not blowing, it would also allow for the movement of brown (non-renewable) power, putting in place an infrastructure for an energy trading system. Supergrid would be implemented in stages, the first being an offshore wind farm in the North Sea called the 10GW Foundation Project. It would demonstrate the project’s feasibility by interconnecting the markets of the UK, the Netherlands and Germany and create economies of scale.
By Dr Eddie O’Connor, CEO and founder of Airtricity, Ireland
- Category: Articles
Application of a Multi-Scheme Ensemble Prediction System
A multi-scheme ensemble prediction system has been successfully applied to the forecasting of wind energy in the Republic of Ireland. An accurate forecasting ability is critical for the safe, efficient and economical operation of the power system. Accurate forecasting has become particularly important because of the rapidly increasing proportion of wind-generated power in the small, synchronous Irish system and also because of the ?impending Single Electricity Market for the Republic and Northern Ireland. Results are presented here for forecasting the total wind generation of the power system. Geographical dispersion of wind farms and the use of ensemble prediction techniques – which allow? the forecast uncertainty to be quantified – should permit higher penetrations of wind generation on isolated and weakly interconnected power systems.
By Steven J. Lang, University College Cork, Ireland
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A multi-scheme ensemble prediction system has been successfully applied to the forecasting of wind energy in the Republic of Ireland. An accurate forecasting ability is critical for the safe, efficient and economical operation of the power system. Accurate forecasting has become particularly important because of the rapidly increasing proportion of wind-generated power in the small, synchronous Irish system and also because of the ?impending Single Electricity Market for the Republic and Northern Ireland. Results are presented here for forecasting the total wind generation of the power system. Geographical dispersion of wind farms and the use of ensemble prediction techniques – which allow? the forecast uncertainty to be quantified – should permit higher penetrations of wind generation on isolated and weakly interconnected power systems.By Steven J. Lang, University College Cork, Ireland
- Reliable Ultimate Loads for Wind Turbines
- A Computational Tool to Aid the Electric Power Utilities
- Clipper’s Liberty Turbine
- Reducing Dynamic Loading of Towers
- Wind Turbines and Earthquakes
- Generating Wind Energy Using Kites
- Technology to Catch the Wind
- Sahara Wind’s Integrated Development Approach
- Wind Energy and Hydrogen Balancing
- Damage on Wind Turbines
- Brakes in Modern Wind Turbines
- A Fresh Breeze for Gears
- GyroTorque, Continuously Variable Transmission (GTCVT)
- Cost of Lost Production
- The Sound of an Endless Train
- SmartEnergy Spire
- A Motion Compensated Platform for Wind Turbine Maintenance
- Zephyr’s ‘Airdolphin’
- Increased Performance by Condition Monitoring of Rotor Blades
- Offshore Winds Observed from Space
- Improving Wind Energy’s Market Penetration
- Measurement at 80 Metres with a New Design Wind Mast
- Turbine Shortages and Rising Costs Stall Development
- Aerodynamic Damping
- Sharing the Sea
- Offshore Wind Farm Layout Optimisation
- New BAUER Flydrill system
- Investigation of Stability Effects of an Offshore Wind Turbine
- AeroBlade
- Geotechnical Analysis Requirements
