Aviation

Assessment of the Effects of Wind Turbines on Air Traffic Control Radars

John J. Lemmon, John E. Carroll, Frank H. Sanders, Doris Turner, U.S. Department of Commerce, NTIA, July 2008

This technical report describes the results of a study exploring the effects of power-producing wind turbines on Federal Aviation Administration (FAA) air traffic control (ATC) radars. The study was performed to identify the extent to which these effects exist, and to identify mitigation techniques and parameters for such effects. The topics addressed in this report are: review of the current state of the literature on wind turbine effects on ATC radar performance; determination of criteria for recommended no-interference radii between ATC radars and wind turbines; determination of methodolo...

Impact Analysis of Wind Farms on Telecommunication Services

I. Anguloa, D. de la Vegaa, , , I. Cascóna, J. Cañizoa, Y. Wub, D. Guerraa, P. Angueira, April 2014

Wind power is one of the fastest-growing technologies for renewable energy generation. Unfortunately, in the recent years some cases of degradation on certain telecommunication systems have arisen due to the presence of wind farms, and expensive and technically complex corrective measurements have been needed. This paper presents a comprehensive review on the impact of wind turbines on the telecommunication services. The paper describes the potential affections to several telecommunication services, the methodology to evaluate this impact, and mitigation measures to be taken in case of...

Modeling the Effects of Wind Turbines on Radar Returns

R. Ryan Ohs, Gregory J. Skidmore, Gary Bedrosian, IEEE, 06 January 2011

Wind turbines located near radar installations can significantly interfere with a radar's ability to detect its intended targets. In order to better understand and mitigate the adverse effects of wind turbines on radar, the government and wind farm community need tools that can be used to analyze the radar returns from wind turbines. Remcom's XGtd® software is a high frequency solver capable of calculating the radar cross section of electrically large objects. In this paper, interference from wind turbines is predicted using XGtd simulations and new post-processing algorithms that...

Vertical Axis Wind Turbine Radar Impact Assessment

Chris New, Sebastian Di Laura, QinetiQ Proprietary, 2008

QinetiQ was contracted by the Air Defence and Air Traffic Services Integrated Project Team to predict and measure the radar cross section (RCS) of a vertical axis wind turbine (VAWT), as well as assess the potential impact it would have on radar. The VAWT used for the study was the Quiet Revolution (QR) qr5, a 7kW turbine that is roughly 5 metres high and 3 metres in width. To predict the RCS of the VAWT, a computer aided design (CAD) model was created, with a finite element mesh applied to it.

Windfarm Characteristics and Their Effect on Radar Systems

C.A. Jackson, IET International Conference on Radar Systems, October 2007

Generating electricity from renewable energy sources is a major part of the UK Government's strategy to tackle climate change and to develop business opportunities. It has set ambitious targets of generating 10% of all UK's energy from renewable sources by 2010 with an aspiration to double this by 2020. Wind energy is expected to be a key contributor to these targets. There are concerns, however, that the construction of wind farms will have a negative effect on both Air Traffic Control (ATC) and Air Defence (AD) radars and many windfarm developments fail due to objections from radar...

Wind Turbine Effects on VOR System Performance

C. Morlaas, M. Fares, B. Souny, IEEE, 20 February 2009

The implementation of wind farms establishment in France is increasing. When wind farms are located close to radionavigation systems, it becomes important to evaluate their electromagnetic effects on existing radionavigation instalations. In this study, the radionavigation system is a VOR (VHF omnidirectional radio) operating at about 110 MHz. Because rotor blades are made of a balsa and dielectric multilayers composition, their electromagnetic behavior differs from that of metal blades at VHF frequences. In this study, we first obtain an electromagnetic CAD model...

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