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| Titel |
A quantitative analysis of the impact of wind turbines on operational Doppler weather radar data |
| VerfasserIn |
L. Norin |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 2 ; Nr. 8, no. 2 (2015-02-05), S.593-609 |
| Datensatznummer |
250116123
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| Publikation (Nr.) |
 copernicus.org/amt-8-593-2015.pdf |
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| Zusammenfassung |
| In many countries wind turbines are rapidly growing in numbers as the demand
for energy from renewable sources increases. The continued deployment of wind
turbines can, however, be problematic for many radar systems, which are
easily disturbed by turbines located in the radar line of sight. Wind
turbines situated in the vicinity of Doppler weather radars can lead to
erroneous precipitation estimates as well as to inaccurate wind and
turbulence measurements. This paper presents a quantitative analysis of the
impact of a wind farm, located in southeastern Sweden, on measurements from
a nearby Doppler weather radar. The analysis is based on 6 years of
operational radar data. In order to evaluate the impact of the wind farm,
average values of all three spectral moments (the radar reflectivity factor,
absolute radial velocity, and spectrum width) of the nearby Doppler weather
radar were calculated, using data before and after the construction of the
wind farm. It is shown that all spectral moments, from a large area at and
downrange from the wind farm, were impacted by the wind turbines. It was also
found that data from radar cells far above the wind farm (near 3 km
altitude) were affected by the wind farm. It is shown that this in part can
be explained by detection by the radar sidelobes and by scattering off
increased levels of dust and turbulence. In a detailed analysis, using data
from a single radar cell, frequency distributions of all spectral moments
were used to study the competition between the weather signal and wind
turbine clutter. It is shown that, when weather echoes give rise to higher
reflectivity values than those of the wind farm, the negative impact of the
wind turbines is greatly reduced for all spectral moments. |
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