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IEC 61400-12 Power Performance
Specifies a procedure for measuring the power performance characteristics of wind turbine generator systems of all types and sizes connected to the electric power network. It is applicable for both the determination of the absolute power performance characteristics of a WTGS and relative differences among the power performance characteristics of various WTGS configurations.
The WTGS power performance characteristics are defined by the measured power curve and the estimated annual energy production (AEP). The measured power curve is determined by collecting simultaneous measurements of wind speed and power output at the test site for a period long enough to establish a statistically significant database over a range of wind speeds and under varying wind conditions. The AEP is estimated by applying the measured power curve to reference wind speed frequency distributions, assuming 100% availability.
In 1995, participants in WG6 agreed to approve the draft standard with the understanding that extensions would be added to the scope of work. These extensions will handle the special requirements of power performance testing of small turbines, as well as testing of all turbines in complex terrain and in wind farm environments. |
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