Classification

Complete test campaign providing quantitative traceability of performance to international standards. This full scale verification test cycle includes a significant number of wind speed bins and measurement heights, a detailed description of site, mast and measurement procedure, an extensive meteorological and statistical error analysis and compliance checks with manufacturers' specifications. This test is complemented by a sensitivity analysis on key meteorological parameters.

Typical duration of a classification test: 3 months.

LiDAR & SoDAR Validation/Verification

At Test Site Lelystad, The Netherlands, Ecofys WTTS offers state of the art validation and verification tests for LiDAR and SoDAR remote sensing systems. For this purpose a fully IEC-compliant 120 m tall mast is available with four measurement heights between 40 and 120 m (40, 80, 95 and 120 m).

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Ecofys WTTS standard services

Present remote sensing standards such as the (draft) IEC61400-12-1 ed. 2 prescribe regular equipment verification. Ecofys WTTS provides both this verification and the simpler validation tests using its 'plug-and-play' test pad, with over 45 validations & verifications performed since 2011. Ecofys WTTS does so, building on its own 14 years of experience in wind measurements using tall masts, SoDARs & LiDARs. Ecofys WTTS is ISO 9001 certified for its measurements and test site operation. Data quality is guaranteed through cooperation with our test site operating partner windtest grevenbroich. Ecofys WTTS can take care of everything from installation, testing, analysis and reporting. Daily quality checks are fully automated and provide the highest possible uptime & quality.

lidar-sodar-validation-verification-2Our 120 m mast, the tallest purpose build met mast in NW Europe, has an attractive open measurement sector to the West, with representative shear. Your machine will be tested against at least four measurement heights (wind speed). This enables smooth and realistic testing for your equipment. Upon request: due to the specific local circumstances at our Test Site Lelystad, we can also perform additional specific purpose tests, such as: testing before/after rotors (of interest for simple PV-curve validation) and testing near forest (of interest to determine accuracy of your machine in forested/high turbulence environments).

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The present standard services entail:

  1. Validation

  2. Verification

  3. Classification

 

Premium Services

Specialized wind characteristics analysis

Ecofys WTTS’ engineers can carry out additional detailed analysis of local wind characteristics, such as:

  • Local features (e.g. strong wind shear, reverse flows),
  • Extreme events (e.g. gustiness),
  • Stability effects (e.g. low-level-jets)

The further analysis of these wind characteristics, provide valuable information that helps to perform with significant accuracy the wind resource assessment and site classification of your project.

For complex terrain, LiDAR can be used in combination with CFD software (e.g. WindSim).

Specific LiDAR tests

At Test Site Lelystad, due to the specific local circumstances, we can perform additional specific purpose tests, such as:

  • Testing before/after wind turbine’s rotor (Pv-curve validation)  
  • Testing accuracy in high turbulence environments (near forest)

 

Verification

Complete test campaign providing quantitative traceability of performance to international standards. This full scale verification test cycle includes a significant number of wind speed bins and measurement heights, a detailed description of site, mast and measurement procedure, an extensive meteorological and statistical error analysis and compliance checks with manufacturers' specifications. Typical duration of a validation test: 8 weeks.

A sample report of our verification services can be found here.

Verification (1)

The LiDAR verification consists of a complete test campaign providing quantitative traceability of performance to international standards. This full scale verification test cycle includes a significant number of wind speed bins and measurement heights, a detailed description of site, mast and measurement procedure, an extensive meteorological and statistical error analysis and compliance checks with manufacturers’ specifications.

A sample report of our verification services can be found here.

Typical duration of verification test: 8 weeks.

Validation

Functional accuracy check of the remote sensing equipment performed against MEASNET calibrated reference anemometers: a short, inexpensive campaign to prove the machine's readiness of comfortable operations in the field. Wind speed and wind direction statistical analysis. Typical duration of a validation test: 3 weeks.

A sample report of our validation services can be found here.

Validation (1)

A LiDAR validation test is a functional accuracy check of the remote sensing equipment performed against MEASNET certified reference anemometers: A short, inexpensive campaign to prove the machine’s readiness of comfortable operations in the field. The validation’s results are concluded from the statistical analysis of wind speed and wind direction measurements.

A sample report of our validation services can be found here.

Typical duration of validation test: 2-3 weeks.

Verification and Validation

Present remote sensing standards prescribe regular equipment testing. This helps LiDAR owners or operators to verify if remote sensing equipment complies with the international standards and provides estimates of LiDAR’s uncertainty.

Ecofys WTTS provides validation and verification campaigns using ‘plug-and-play’ measurement test pads at the biggest onshore test site in Europe: Wind Turbine Test Site Lelystad in The Netherlands. The LiDARs are tested against one of our fully compliant MEASNET-compliant 80-120 m met masts. In order to achieve high quality and reliable testing, LiDARs are tested against at least 4 different measurement heights.

When reserving your full service package, Ecofys WTTS can take care of everything from transportation, installation, testing, analysis and reporting. Daily quality checks are fully automated and provide the highest possible uptime & quality.

ecofys lidar verification

LiDAR / SoDAR Measurements

Light Detection and Ranging (LiDAR) technology allows to capture all wind characteristics up to 200 m of height with high accuracy quick and easy.

Due to its high flexibility, a LiDAR is the ideal instrument to reduce project uncertainties in a relatively short time and at reasonable costs. Deployment as stand-alone, adjacent to a shorter mast or at multiple locations within your project, can help to significantly bring down the uncertainty and hence your costs and risks of financing. Additionally, a LiDAR can be also deployed in operating wind farms for performance assessment.

Ecofys WTTS provides full wind measurement campaigns using either our own hardware offerings or provide campaign management services with the client's LiDARs.

Offered as a standard service package, we will take care of all the necessary actions, which include:

  • Selection of suitable position
  • Transportation and installation,
  • Maintenance
  • Measurement campaign operation
  • Decommissioning
  • Reporting

Daily quality check is performed fully automatic to provide the highest possible uptime. Final reporting is done in close cooperation with the client, incorporating its specific wishes, site specific conditions and micrositing.

A LiDAR measurement campaign can normally be provided within a few weeks since no building permits are required.

In light of the latest technological and industry developments, Ecofys investigated further the use of LiDARs focusing on wind farm's bankability and wind measurement's strategy:

Position papers:

Improved Bankability: The Ecofys position on LiDAR use

Shorter Wind Measurement Campaigns: Speeding up wind farm developments with LiDAR

 

Please find more information about our LiDAR services here.

 

LiDAR Wind Measurements | Wind Park Optimisation | Wind Measurement Concepts | Campaign Management | Wind Resource Assessment | Yield Prediction | Validation and Verification Tests for Remote Sensing devices | Proposal Management of Wind Measurements

Meteorological Masts

Ecofys WTTS performs wind measurement campaigns using meteorological masts. Based on our long experience and extensive track-record we offer the full range of wind measurement services.

Ecofys WTTS provides either its own inventory or tailor made designs for meteorological masts. In cooperation with our partners, we offer our clients full package services including:

  • Selection of suitable met mast position
  • Design of the met mast
  • Complete building permit application
  • Installation and maintenance
  • Measurement campaign management
  • Wind measurements certification
  • Wind resource assessment based on the measurements

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