NBN EN 61400-12 : 1998

INTRODUCTION
1 General
    1.1 Scope
    1.2 Normative references
    1.3 Definitions
    1.4 Symbols and units
    1.5 Abbreviations
2 Test conditions
    2.1 Wind turbine generator system
    2.2 Test site
3 Test equipment
    3.1 Electric power
    3.2 Wind speed
    3.3 Wind direction
    3.4 Air density
    3.5 Precipitation
    3.6 Wind turbine generator system status
    3.7 Data acquisition system
4 Measurement procedure
    4.1 Introduction
    4.2 Wind turbine generator system operation
    4.3 Data collection
    4.4 Data selection
    4.5 Data correction
    4.6 Database
5 Derived results
    5.1 Data normalization
    5.2 Determination of measured power curve
    5.3 Annual energy production (AEP)
    5.4 Power coefficient
6 Reporting format
Tables
1 Example of presentation of a measured power curve
2 Example of presentation of estimated annual energy
    production
Figures
1 Requirements as to distance of the meteorological mast
    and maximum allowed
2 Presentation of example data: power performance test
    scatter plots
3 Presentation of example measured power curve
Annexes
A Assessment of test site
B Calibration of test site
C Evaluation of uncertainty in measurement
D Theoretical basis for dertermining the uncertainty of
    measurement using the method of bins
E Bibliography
ZA Normative references to international publications with
    their corresponding European publications

Defines a procedure for measurement of the power performance characteristics of a single wind turbine generator system, and is applicable to the testing of WTGS of all kinds and sizes connected to the electrical power network. Applies for determining of both the absolute power performance characteristics of a WTGS and differences between the power performance characteristics of various WTGS configurations.