Testing of Wind Turbine Lightning Protection Systems - Comparison of Testing the Full-Scale Blade Length and a Small Section of the Blade Tip

2019 ◽  
Author(s):  
Godson I. Ikhazuangbe ◽  
Mumtai Begam ◽  
Chandima Gomes ◽  
Anandan Shanmugam ◽  
Agbeb Stephen ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Full Scale ◽  
Lightning Protection ◽  
Small Section ◽  
Blade Length ◽  
Protection Systems ◽  
Blade Tip

Validation of a lightning protection system for a fusion-welded thermoplastic composite wind turbine blade tip

2021 ◽  
pp. 0309524X2110246
Author(s):  
Robynne E Murray ◽  
Andy Plumer ◽  
Ryan Beach ◽  
Peter Broome
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Bond Line ◽  
Fusion Welding ◽  
Protection System ◽  
Thermoplastic Composite ◽  
Lightning Strike ◽  
Lightning Protection ◽  
Main Challenge ◽  
Blade Tip

Fusion welding for thermoplastic composite wind turbine blades is being investigated as a replacement for adhesives in bond lines to reduce manufacturing time and cost and to promote ease of recyclability. Resistance welding uses an electrically conductive material, such as carbon fiber, embedded in the bond line to heat the joining surfaces and fuse them together under pressure. One main challenge with fusion joining for large wind blades is the ability to use this conductive heating element in the bond line while still protecting the blade from the catastrophic effects of a lightning strike. This paper outlines the design and manufacturing of a lightning protection system for a 5-m-long thermally welded blade tip. The outcomes of high voltage and high current lightning testing applied to the 5 m blade tip show that the proposed design was able to protect the fusion welded bond lines from significant lightning damage.

Noise Source Localization Using a Compact Phased Array: Studies on a Full Scale Wind Turbine in a Wind Farm

2012 ◽  
Vol 36 (5) ◽  
pp. 589-604 ◽  
Author(s):  
Rakesh C. Ramachandran ◽  
Ganesh Raman ◽  
Robert P. Dougherty
Keyword(s):  
Wind Turbine ◽  
Wind Farm ◽  
Microphone Array ◽  
Low Noise ◽  
Full Scale ◽  
Microphone Arrays ◽  
Aerodynamic Noise ◽  
Noise Sources ◽  
Blade Tip ◽  
Primary Focus

Locating the dominant noise sources on a wind turbine is an important problem in designing and developing low noise wind turbines. Previously very large microphone arrays were used to locate these sources. The primary focus of this paper is to show that using a compact and mobile microphone array with advanced beamforming algorithms, the noise sources can be successfully located and quantified. The results from the qualification experiments on the microphone array conducted in laboratory using synthetic noise sources show the differences between the various beamforming algorithms used in this study (both frequency and time domain algorithms). The initial experimental results on a full scale wind turbine reveal that it is indeed possible to locate the noise sources using a compact microphone array by successfully locating the two dominant noise sources on the wind turbine namely, aerodynamic noise near the blade tip and mechanical noise from nacelle.

Models of Wind-Turbine Main Shaft Bearings for the Development of Specific Lightning Protection Systems

2007 ◽  
Author(s):  
M. Paolone ◽  
F. Napolitano ◽  
A. Borghetti ◽  
C.A. Nucci ◽  
M. Marzinotto ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Lightning Protection ◽  
Main Shaft ◽  
Protection Systems

Models of Wind-Turbine Main-Shaft Bearings for the Development of Specific Lightning Protection Systems

2011 ◽  
Vol 53 (1) ◽  
pp. 99-107 ◽  
Author(s):  
Fabio Napolitano ◽  
Mario Paolone ◽  
Alberto Borghetti ◽  
Carlo Alberto Nucci ◽  
Andrea Cristofolini ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Lightning Protection ◽  
Main Shaft ◽  
Protection Systems

Aerodynamic Noise Characterization of a Full-Scale Wind Turbine through High-Frequency Surface Pressure Measurements

2015 ◽  
Vol 14 (5-6) ◽  
pp. 729-766 ◽  
Author(s):  
Franck Bertagnolio ◽  
Helge Aa. Madsen ◽  
Christian Bak ◽  
Niels Troldborg ◽  
Andreas Fischer
Keyword(s):  
Wind Turbine ◽  
Surface Pressure ◽  
High Frequency ◽  
Full Scale ◽  
Aerodynamic Noise ◽  
Pressure Measurements ◽  
Noise Characterization
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