DEWI GmbH - Deutsches Windenergie Institut services

Mechanical Loads, Power Performance, Acoustic Noise / Vibration. When developing new wind turbines, extensive measurements of the mechanical loads acting on the prototypes during operation are indispensable. The results of these load measurements carried out by DEWI are used in the design validation and certification of wind turbine prototypes. Design validation and certification represent the key to a mechanically reliable wind turbine which is ready for series production.

Power Quality, Grid Calculations, Grid Code Compliance. In the field of grid integration DEWI carries out measurements and evaluations to determine the electrical characteristics and grid compatibility of wind turbines, solar inverters and of other generation units/systems. The measurements are required for planning grid connections and verifying applicable limits, but they also allow an exact analysis of the electrical behaviour of the generation units and systems, which is important for their design, development and optimisation. In this connection DEWI also carries out calculations of required grid capacities as well as power quality and background interference measurements.

Damage Analyses, Periodic Inspections & Specific Inspections. To ensure a safe and efficient operation of wind turbines and wind farms, DEWI offers an independent service for periodic technical inspections during the project life cycle. Our goal is to maintain your wind turbines in optimal condition by means of an assessment of the current technical state, clarification of technical issues and initial damages summed up with accurate recommendations in a well documented report.

Research & Studies, Trainings & Seminars, Offshore Wind Energy. The strong growth and dynamic development of the international wind energy market leads to a high demand for research and consultancy services. Because of DEWI‘s participation and membership in a large number of research groups, our staff have acquired extensive knowledge about scientific, technological and political issues.

Expert Opinions, Political Consulting, Conferences & Working Groups. For those countries which are beginning to get engaged in wind energy, DEWI is well accepted as a company which is able to provide neutral, manufacturer independent information and consultancy. Even political, legal and administrative information can be provided by DEWI, because it actively participated in all the discussions concerning these areas in Germany during the last years.

Our Turbine and Component Expertise DEWI offers one-stop safety and performance testing services for wind turbines and their components based on international and national standards and regulations (IEC 61400 series, MEASNET, FGW). We always work with each customer’s individual needs, and flexibly assist in Solutions that speed products to market.

• Site Inspection
• Wind data analysis from mast and remote sensors (SODAR/LiDAR)
• Long-term correction of the on-site available data
• Wind flow modelling (WASP/CFD)
• Wind farm efficiency calculation
• Calculation of the expected energy yield (gross p50) under consideration of systematical losses (net p50) and the respective uncertainties and exceedance probabilities (p75, p90, p99 values)