Back-to-top

Services for Manufacturers

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.

Validation & Type Testing
Validation testing is the process in the overall product development process that helps verifying that the wind turbine (component) is implemented in reality as designed. Type testing in the context of wind turbine type certification, however, helps verifying that the wind turbine (component) is in compliance with relevant and defined standards and rules.
DEWI provides field and laboratory testing to acquire the data needed to verify wind turbine function, safety, structural integrity, power performance, power quality, and acoustic noise emission characteristics. Beside worldwide testing activities in customer prototypes DEWI operates two wind turbine test facilities offering favorable yearround wind conditions for the testing of small and large wind turbines for extended periods.


Type testing within the timeline of a type certification process (onshore, acc. to IEC 61400-22, beige text = development phases at WT manufacturer or services by certification body)

Type Testing
Mechanical Loads Power Performance Electrical Characteristics LVRT Testing Acoustics Test Site

Mechanical Loads

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. DEWI offers load assessments according to IEC61400-13 or any customer specific scope on wind turbines and their components.

Guideline:
IEC61400-13  

more information  

Power Performance

The measurement of wind turbine power curves is one of the key activities in the range of services of DEWI. The power curve summarizes a lot of the efforts that went into the design of a wind turbine and as such the power curve report is an integral part of every type testing campaign. Next to the classic setting of measuring a power curve using met tower based cup anemometry DEWI is active in the development of the methodology utilizing ground based lidars to operate with the new wind speed definition of rotor equivalent wind speed.

Furthermore we are offering nacelle based measurement approaches taking their data from cup anemometers, lidars or spinner anemometry. These are interesting alternatives in offshore environments as well as for turbines with large hub heights and when it comes to detect yaw misalignment.

Guidelines:

  • IEC 61400-12-1
  • IEC 61400-12-2
  • Measnet Power Performance Measurement Procedure Version 5
  • FGW Technische Richtlinie 2, Rev 6 and FGW Technische Richtlinie 5, Rev 5
  • IEA wind, 15. Ground-based vertically profiling remote sensing for wind resource assessment
  • DTU E-0019, Procedure for wind turbine power performance measurement with a two-beam nacelle lidar

Öffnet internen Link im aktuellen Fensterweitere Informationen  

Test Site

DEWI operates a wind turbine test site near Wilhelmshaven which currently has ten prototypes of various European manufacturers with installed capacities ranging from 500 kW to 3,000 kW and a total capacity of more than 19 MW. Another test site is located at West Texas AM University, USA.

DEWI performs all kinds of measurements on these different prototypes, ranging from machinery noise to mechanical loads on the rotor blades.

Electrical Characteristics

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, combined heat and power plants (CHP) 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 behavior of the generation units and systems, which is important for their design, development and optimization. In this connection DEWI also carries out calculations of required grid capacities as well as power quality and background interference measurements.

Guidelines:

  • Technische Richtlinien für Erzeugungseinheiten und -anlagen, Teil 3 (TR3): Bestimmung der Elektrischen Eigenschaften von Erzeugungseinheiten und -anlagen am Mittel-, Hoch- und Höchstspannungsnetz; Rev. 23; Stand: 01.05.2013; Herausgeber: Fördergesellschaft Windenergie und andere Erneuerbare Energien (FGW e.V.)
  • IEC 61400-21: Wind turbines – Part 21: Measurement and assessment of power quality characteristics of grid connected wind turbines; Edition 2.0 2008-08.

more information 

LVRT Testing

Before any generating plant can be connected to the grid, the system operator normally requires a certificate, which in turn requires the measurement of electrical characteristics and increasingly also verification of the plant’s Low Voltage Ride Through (LVRT) capability. DEWI offers LVRT testing and measuring services to determine the electrical characteristics and grid compatibility of wind turbines, solar inverters, combined heat and power plants (CHP) and other generation units/systems.

Guidelines:

  • Technische Richtlinien für Erzeugungseinheiten und -anlagen, Teil 3 (TR3): Bestimmung der Elektrischen Eigenschaften von Erzeugungseinheiten und -anlagen am Mittel-, Hoch- und Höchstspannungsnetz; Rev. 23; Stand: 01.05.2013; Herausgeber: Fördergesellschaft Windenergie und andere Erneuerbare Energien (FGW e.V.)
  • IEC 61400-21: Wind turbines – Part 21: Measurement and assessment of power quality characteristics of grid connected wind turbines; Edition 2.0 2008-08.
  • Particular Grid Code requirements which may vary from country to country.

Öffnet internen Link im aktuellen Fenstermore information

 
 

 
 

Download

Brochures and sell sheets can be downloaded here