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- Category: Articles
Designed for Documenting Fast Transients in High-Voltage Grids of Large Wind Farms
Although wind power development is still mainly based on land sites, a number of large offshore wind farms have been developed, and there are significant plans for further offshore wind power development, This development produces a need for accurate models of all main components in a wind farm because simulations are widely used to predict what happens in case of faults and switching operations in the grid. The result of simulations can always be questioned, and depends on the accuracy of the component models used in the simulation program. Validation of simulations with reliable measurements performed in a real large wind farm makes it possible to verify and improve the simulations and to give more reliable results. DELTA has built a system for measuring fast transients synchronously in three different locations on a wind farm.By L.S. Christensen, P.E. Sørensen, T. Olsen, H.K. Nielsen and T. Sørensen, Denmark
- Category: Articles
Measurements of Angular Velocity, Pitch Angle and Perpendicularity of Individual Rotor Blades
The ever-increasing strain on the traditional exploration of natural resources to provide for the worldwide demand for energy is paving the way for the wind turbine sector. We are seeing a dramatic increase in the number and size of wind turbines, producing more watts by the day. Our sector has no shortage of technological needs, but no shortage of creative minds either. Nowadays, commercial and academic institutions are reaping the benefits of joint developments. One of many exciting new developments combines the hands-on knowledge of wind turbine mechanics with photosensor technology. This article details a reliable and accurate method for measuring angular velocities, rotor blade pitch angles and the perpendicularity of individual rotor blades using vision technology. The necessary technology is packaged into a commercial service for quick and cost-effective monitoring.By Joris Goos, Delft Vision and Geodelta, and Gerard Ruesink and Ivo Lubbers, Compositive Works, The Netherlands
- Category: Articles
Techno-Economic Benefits
Various technical solutions are available for condition monitoring (CM) of wind farms. The technical and economic benefits of CM systems are the subject of debate between manufacturers and operators. Manufacturers state that CM systems lower operation costs via optimised maintenance scheduling and resource management. Operators are keen for the techno-economic benefits to be demonstrated before they switch from time-based maintenance to condition-based maintenance. In particular, the merits of monitoring individual sub-components are unclear. This article presents a method that has been developed to estimate the techno-economic benefits of individual wind farm CM options based on a combination of industry experience and publicly available data.By David McMillan, Institute for Energy & Environment, Department of Electronic and Electrical Engineering, University of Strathclyde, UK
- Category: Articles
A New Technology
A growing concern relating to propeller-driven wind turbines is that this technology is incapable of satisfying the long-term requirements for wind harvesting without having severe economic and environmental consequences. A new and more efficient wind harvesting methodology is needed - now.By Gene R. Kelley, Founder and Chief Executive Officer, W2 Energy Development Corporation, USA
- Category: Articles
Applying Advanced Simulation Technologies to Master Wind Turbine Acoustics
The large physical size and characteristic acoustic radiation of wind turbines make it a real challenge to accurately simulate wind turbine acoustics early in development. A wind turbine manufacturer and LMS Engineering Services have joined forces to build a hybrid vibro-acoustic simulation model. The building and validation of the wind turbine model through operational measurements carried out 100 metres above the ground are described in this article.By Wim Hendrickx, LMS International, Belgium
- Category: Articles
Measurement System Specialists Team with Algorithm and Analysis Experts
Wind turbine individual pitch control (IPC) based on measures of rotor load offers substantial reduction in blade fatigue load and significant knock-on benefits to the rest of the turbine structure. The load reduction can be exploited through lighter, cheaper blades and hubs or, where fatigue is the design driver, fitting larger rotors to existing turbine structures.By Ervin Bossanyi, Garrad Hassan, and Mark Volanthen, Insensys, UK
.- Category: Articles
Taking Meteorological Predictability into Account when Choosing Sites
The overall economy of a wind power project depends not only on how much energy can be produced but also on how well the daily production can be predicted. When the wind power is well predicted, the cost of balancing it with power from other sources is low, and vice versa. Sites with strong winds and high production are often also sites where the wind and the production are difficult to predict. This article examines the trade-off between production and predictability by comparing two offshore wind power plants with respect to the energy produced and the economic value of the production. The example shows that it may well be a good idea to build wind power plants in places where the winds are weaker, but easier to predict.
By Anna Hilden, FRONTWEATHER, Denmark
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By Anna Hilden, FRONTWEATHER, Denmark
