METEO

Function

  • Import, analysis, synthesize and presentation of measured wind data.
  • Preparation of the wind data for wind statistics generation with WAsP.
  • Advanced analysis and synthesize of wind data between different masts in the METEO analyzer tool.
  • Import of long-term reference data from our extensive worldwide online database with both meteorological measure-ments and mesoscale model data (access requires license to the MCP module).
  • Calculation of the energy yield of a WTG based on measured on-site wind data (without applying a flow model, like WAsP, for offshore project for example).

Calculation MethodMETEO

The simple energy calculation that  can be perfomed with the METEO module, consists in the integration the wind data with the WTG power curve at a selected hub height. Three wind data types are possible as an input:
Weibull, where the Weibull-fitted data from the measurements are integrated with the WTG power curve.
Measure, where the frequency table of measured wind data is directly integrated with the power curve.
Time series, where the measurements as time series are directly integrated with the power curve.

In all cases, a height correction of the measured data from the measuring height to hub height is calculated with the shear exponent. The shear exponent can be entered sector wise or automatically calculated for different day/night/seasonal conditions from additional measuring heights.

Necessary Input Data (Objects)

Meteorological data:
Meteorological data are input in the METEO Object. Joint distribution of wind speed and direction can be introduced as one of the following:

Raw logger data:
Advanced import filter can read any ASCII files with time stamps, and selected binary files. Handles: wind speed, wind direction, standard deviation or turbulence intensity, date and time, temperature and many other atmospheric parameters.

METEO2Time series (wind speed, wind direction, turbulence intensity, date and time) and more
Frequency table (wind speed distribution and turbulence intensity for each directional sector).
Weibull Data for each directional sector

Additional measured heights are handled in the same METEO Object. Lots of advanced tables and graphic analysis features (statistics, data recovery rate, wind speed difference/ratio diagram, wind roses).

Wind Turbine (Power Curve)
To perform a simple energy calculation one or more power curve is required. The power curve can be found in the WTG Catalogue. The power curve is adjusted for the local air density, which can be taken from the embedded climate database or calculated from local measurements.

Description

METEO3The METEO module is both an advanced import and analysis module for measured wind data and a way to calculate energy yield of a WTG based directly on measured wind data.
It is possible to read any kind of data (wind speed and direction, temperature, cloudiness,…) arrange them in time series, tab files and obtain the Weibull parameters.
It is possible to visually inspect time series, gunshot diagrams, directional distributions and much more. Basically any signal can be plotted against each other. The WAsP vertical profile can be calculated and compared to the measured wind profile. The shear table can be calculated based on different measured data. Different time series can be compared with each other in all diagrams and selected data can be disabled both through selection filters and visually on the time series, which makes it easy to identify and eliminate errors in the measurements.

METEO4Included in the METEO module is the METEO ANALYZER which is a strong tool to compare the data of different measurement masts, to make substitution of time series (e.g. to synthesize time series in case of missing data or to scale the data sectorwise and on monthly/dayly wise), cross-predictions using WAsP, or preparing data for time-dependent PARK calculations.

Calculations report

The report generator includes a number of printouts and analysis options. The following printouts are available:

From the METEO Object:
The report available from the METEO object provides a thorough documentation of the analyzed wind data. Data period and missing data, time series data are presented as: “Radar” graph, diurnal report, monthly distribution and time series, Weibull fit compared to measured data as a histogram and direction frequency, Turbulence for each direction and wind speed, wind speed difference. Basically, any graph available within the METEO object can be reported.

From the METEO calculation report:
Main Printout, Energy Production Analysis, Power Curve Analysis, Wind Data Analysis, Maps.

View reports from the METEO module

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