Jiapeng Yin - Speaker

Oleg Krasnov - Speaker

Christine Unal - Speaker

Stefano Medagli - Speaker

Herman Russchenberg - Speaker

The increasing size and quantity of wind turbines worldwide provide an environmental-friendly solution to fulfill the growing demand for energy. However, this also brings in a new dynamic clutter named wind turbine clutter (WTC) for weather radars, and it has gradually become a concern because WTC deteriorates the radar performance severely. Recently, a WTC measurement campaign was conducted in the Delft University of Technology (TU Delft) using the high-resolution full-polarimetric S-band Doppler PARSAX radar in two configurations: (a) using dual-orthogonal polarimetric signals for simultaneous measurements of whole polarimetric scattering matrix (PSM) (simultaneously transmitting simultaneously receiving (STSR) H and V polarization) and (b) using "classic" time-multiplexing polarimetric signals for measuring the PSM with two sweeps (alternatively transmitting simultaneously receiving (ATSR) H and V polarization). This paper discusses the micro-Doppler signature and the spectral-polarimetric properties of WTC in the STSR mode and ATSR mode. The micro-Doppler feature of WTC was estimated and analyzed. It provides an important indicator for the WTC detection. While the spectral-polarimetric properties can be used to distinguish WTC from weather scatterers. Consequently, three significant spectral-polarimetric observables, namely the spectral differential reflectivity, spectral linear depolarization ratio, and spectral co-pol correlation coefficient, are calculated and their probability density functions are given in the two measurement modes. Finally, a simple thresholding method to mitigate the WTC is proposed, which shows good efficiency with the synthesis of different spectral-polarimetric variables.
6 Dec 20167 Dec 2016

Event (Workshop)

TitleSpecialist Meeting about Electromagnetic Waves and Wind Turbines 2016
Period6/12/166/12/16
DescriptionSince the exit from nuclear and fossil fuel energy, the construction of power plants based on renewable energy is pushed forward worldwide. Energy production by wind energy plants is one of the favorites. Thus, wind energy farms can be found in all western countries. With the increase of the number of wind energy plants influences on the propagation of electromagnetic waves were observed. The loss of radar tracks, wrong positioning based on electromagnetic beacons and prediction errors by weather radars are effects which are often noted. Based on these experiences the research of the effects of wind turbines on electromagnetic wave propagation was intensified. An increasing number of publications and contributions in scientific journals and on conferences prove the growing interest in the topic. On the other hand electromagnetic waves are used during the operation and offer solutions to run wind energy turbines also under difficult conditions. Material inspection of rotor blades, bird protection and the control of navigation lights is often only possible by the use of radar.

To bring together the increasing number of experts and researchers in the field of electromagnetic waves within the context of wind energy plants and to offer a platform to discuss arising and existing problems, the focus days EMWT’16 provide a fitting platform. In contrast to other conferences EMWT’16 will cover the whole field of electromagnetic waves and wind energy in one specialist meeting.
Web address (URL)
LocationFraunhofer FHR
CityWachtberg
CountryGermany
Degree of recognitionInternational event

ID: 21280989