Analysis of Lightning Strike Characteristics and Electromagnetic Environment of Wind Turbine Blades

2019 ◽  
Author(s):  
Jiangong Zhang ◽  
Gang Liu ◽  
Tang Bo ◽  
Xingfa Liu ◽  
Ziyi Liu ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Lightning Strike ◽  
Electromagnetic Environment ◽  
Wind Turbine Blades

scholarly journals Lightning strike evaluation on composite and biocomposite vertical-axis wind turbine blade using structural health monitoring approach

2018 ◽  
Vol 29 (17) ◽  
pp. 3444-3455 ◽  
Author(s):  
Siti Zubaidah Mat Daud ◽  
Faizal Mustapha ◽  
Zuraimy Adzis
Keyword(s):  
Structural Health Monitoring ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Health Monitoring ◽  
Turbine Blades ◽  
Flax Fibre ◽  
Wind Turbine Blade ◽  
Lightning Strike ◽  
Wind Turbine Blades ◽  
Structural Health

Lightning damages to wind turbine blades increase as the size of wind turbine becomes larger. The damages are quite serious since it contributes to high cost of repairs and loss of electric power production. Since natural plant fibres receive attention nowadays due to low density and high specific strength, the usage of natural fibre to replace synthetic fibre in fabricating the turbine blade will promote a green renewable material. As the application of biocomposite for wind turbine blade has been explored, the effect of lightning strike damage has been required for further test investigation. This article explores the comparative results of performing lightning strike damage testing on composite (fibreglass) and biocomposite (flax fibre) wind turbine blades with protective metal mesh materials. The damage assessments were performed using visual non-destructive inspection methods and piezoelectric sensor as part of structural health monitoring. From the result, it is found that fibreglass blade experienced larger damage area compared to flax fibre blade based on the visual test conducted.

scholarly journals Study on Improvement of Lightning Damage Detection Model for Wind Turbine Blade

Machines ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 9
Author(s):  
Takuto Matsui ◽  
Kazuo Yamamoto ◽  
Jun Ogata
Keyword(s):  
Damage Detection ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Detection System ◽  
Turbine Blades ◽  
Lightning Strike ◽  
Wind Turbine Blades ◽  
Lightning Strikes ◽  
Detection Model ◽  
Secondary Damage

There have been many reports of damage to wind turbine blades caused by lightning strikes in Japan. In some of these cases, the blades struck by lightning continue to rotate, causing more serious secondary damage. To prevent such accidents, it is a requirement that a lightning detection system is installed on the wind turbine in areas where winter lightning occurs in Japan. This immediately stops the wind turbine if the system detects a lightning strike. Normally, these wind turbines are restarted after confirming soundness of the blade through visual inspection. However, it is often difficult to confirm the soundness of the blade visually for reasons such as bad weather. This process prolongs the time taken to restart, and it is one of the causes that reduces the availability of the wind turbines. In this research, we constructed a damage detection model for wind turbine blades using machine learning based on SCADA system data and, thereby, considered whether the technology automatically confirms the soundness of wind turbine blades.

scholarly journals Lightning Protection Methods for Wind Turbine Blades: An Alternative Approach

2020 ◽  
Vol 10 (6) ◽  
pp. 2130
Author(s):  
Viktor Mucsi ◽  
Ahmad Syahrir Ayub ◽  
Firdaus Muhammad-Sukki ◽  
Muhammad Zulkipli ◽  
Mohd Nabil Muhtazaruddin ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Lightning Strike ◽  
Lightning Protection ◽  
Wind Turbine Blades ◽  
New Approach ◽  
Lightning Strikes ◽  
Tall Structures ◽  
Alternative Approach ◽  
Hybrid Conductor

Lightning strikes happens in a fraction of time, where they can transfer huge amounts of charge and high currents in a single strike. The chances for a structure to be struck by lightning increases as the height increases; thus, tall structures are more prone to lightning. Despite the existing lightning protection systems available for wind turbine blades, there are still many cases reported due to the fact of damage caused by lightning strike. Owing to that, the present work introduces a new approach for a lightning protection system for wind turbine blades where preliminary investigations were done using Analysis Systems (ANSYS) Workbench. Two models were developed: one with a conventional type down conductor system and the other with a hybrid conductor system. The recorded findings have been compared and discussed, where it was found that the hybrid conductor system may provide alternative protection from lightning for wind turbine blades.

scholarly journals Low Cost Carbon Fiber as Potential Lightning Strike Protection for Wind Turbine Blades

2020 ◽  
Author(s):  
VIPIN KUMAR ◽  
SURBHI SUBASH KORE ◽  
MERLIN THEODORE ◽  
YEQING WANG ◽  
KAMRAN YOUSEFPOUR ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Wind Turbine ◽  
Low Cost ◽  
Turbine Blades ◽  
Lightning Strike ◽  
Wind Turbine Blades

Optimization Design of Composite Wind Turbine Blades Integrating Lightning Strike Analysis

2017 ◽  
Author(s):  
Weifei Hu ◽  
Yeqing Wang
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Dielectric Breakdown ◽  
Breakdown Strength ◽  
Turbine Blades ◽  
Optimization Procedure ◽  
Wind Turbine Blade ◽  
Lightning Strike ◽  
Wind Turbine Blades ◽  
Laminate Thickness

This paper presents an optimization procedure which integrates lightning strike analysis into design reliable and economical composite wind turbine blades. A high-fidelity 5-MW composite wind turbine blade is applied into the lightning strike analysis and the optimization procedure under four different lightning severity levels. The lightning-strike-induced electric field along the wind turbine blade at the top vertical position is calculated using finite element analysis. The dielectric breakdown strength of the composite wind turbine blade is considered as a function of laminate thickness. The lightning safety ratio is then calculated as the ratio between the dielectric breakdown strength and the magnitude of the lightning-strike-induced electric field. Subjected to the lightning constraints and fatigue constraints, the optimization procedure minimizes the total composite material cost by fine-tuning the laminate thickness design variables of the blade model. Both the lightning strike analysis and the optimization results indicate that the blade tip is the most vulnerable region against lightning strike damage. The obtained optimum designs under the four lightning severity levels increase the lightning safety ratio by 36% – 45% and increase the fatigue life more than 15 times compared with the initial blade design.

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