CEI EN 61400-12-1 : 2007

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Power performance method overview
6 Preparation for performance test
7 Test equipment
8 Measurement procedure
9 Derived results
10 Reporting format
Annex A (normative) - Assessment of influences
        caused by wind turbines and obstacles
        at the test site
Annex B (normative) - Assessment of terrain at
        the test site
Annex C (normative) - Site calibration procedure
Annex D (normative) - Evaluation of uncertainty in
        measurement
Annex E (informative) - Theoretical basis for determining
        the uncertainty of measurement using the method of bins
Annex F (normative) - Wind tunnel calibration procedure
        for anemometers
Annex G (normative) - Mounting of instruments on the
        meteorological mast
Annex H (normative) - Power performance testing of
        small wind turbines
Annex I (normative) - Classification of cup and sonic
        anemometry
Annex J (normative) - Assessment of cup and sonic
        anemometry
Annex K (normative) - In-situ comparison of anemometers
Annex L (normative) - The application of remote
        sensing technology
Annex M (informative) - Normalisation of power curve data
        according to the turbulence Intensity
Annex N (informative) - Wind tunnel calibration procedure
        for wind direction sensors
Annex O (informative) - Power performance testing in
        cold climate
Annex P (informative) - Wind shear normalisation procedure
Annex Q (informative) - Definition of the rotor equivalent
        wind speed under consideration of wind veer
Annex R (informative) - Uncertainty considerations
        for tests on multiple turbines
Annex S (informative) - Mast flow distortion
        correction for lattice masts
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

Describes the procedure for measuring the power performance characteristics of a single wind turbine and applies to the testing of wind turbines of all types and sizes connected to the electrical power network.