IEC Acoustic Standard IEC 61400-11
IEC Acoustic Standard IEC 61400-11
IEC Acoustic Standard IEC 61400-11
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Filtering for Valid Data<br />
– Listen for interrupting noises (cars, other turbines, airplanes)<br />
– Transitions<br />
– Wind direction or yaw direction outside of ±15 degrees from<br />
microphone board<br />
– Plot sound pressure vs. wind speed or power or rotor speed<br />
– Look for outliers, verify if they are “real”<br />
Rotor<br />
Wind<br />
Wind<br />
Turb or<br />
Time Power Speed Temperature Speed Pressure Direction Availability Leq WD ok? Back<br />
13:36:35 -156 0 10 8 80 228 0 41 -10 Back<br />
13:36:45 -156 0 10 6 80 240 0 40 -10 Back<br />
13:36:55 -156 0 10 8 80 226 0 39 -10 Back<br />
13:37:05 -156 0 10 9 80 225 0 40 -10 Back<br />
13:37:15 -156 0 10 8 80 220 0 40 -10 Back<br />
13:37:25 -156 0 10 9 80 221 0 39 -10 Back<br />
13:37:35 -156 0 10 10 80 228 0 41 -10 Back<br />
13:37:45 -156 0 10 10 80 221 0 41 -10 Back<br />
NATIONAL RENEWABLE ENERGY LABORATORY<br />
25
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