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Microcosmic Mechanism Investigation on Lightning Arc Damage of Wind Turbine Blades Based on Molecular Reaction Dynamics and Impact Current Experiment

Author

Listed:
  • Li Zhang

    (School of electrical engineering, Shandong University, Jinan 250000, China)

  • Liyang Jiang

    (School of electrical engineering, Shandong University, Jinan 250000, China)

  • Tong Zhao

    (School of electrical engineering, Shandong University, Jinan 250000, China)

  • Liang Zou

    (School of electrical engineering, Shandong University, Jinan 250000, China)

Abstract

PVC and balsa wood are usually used in the interlayer structures of wind turbine blades. In this paper, a comparative study on the lightning damage characteristics of the two materials was carried out by molecular dynamic simulations and impact current experiments. The simulations show that the glycosidic bonds in cellulose break first, which leads to a strong decrease in the degree of polymerization (DP) of cellulose (while the DP of PVC changes irregularly), then C−O bonds in the pyranoid ring break and the main chain of cellulose is destroyed, producing small molecule fractions and a lot of gas molecules. There are two steps in the pyrolysis of PVC. H and Cl atoms fall off the main chain and combined for form HCl, which needs less energy and occurs earlier than cellulose pyrolysis at 2000 K, but cellulose generates more gas products than PVC at the same temperature. Thus the damages to balsa wood and PVC mainly appear as fiber fractures and pore extension, respectively, which are consistent with the morphological features of the damage to the two materials in the impact current experiments. The experimental results also show that the pyrolysis temperature of PVC was lower than that of balsa wood, and the residual strength decreases faster in PVC than in balsa wood with the increase of peak current. This study should play an important guiding role for lightning protection and material selection of wind turbine blades.

Suggested Citation

  • Li Zhang & Liyang Jiang & Tong Zhao & Liang Zou, 2017. "Microcosmic Mechanism Investigation on Lightning Arc Damage of Wind Turbine Blades Based on Molecular Reaction Dynamics and Impact Current Experiment," Energies, MDPI, vol. 10(12), pages 1-15, December.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:12:p:2010-:d:121174
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    References listed on IDEAS

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    1. Kuo-Chang Tsai & Cheng-Tang Pan & Aubryn M. Cooperman & Scott J. Johnson & C. P. Van Dam, 2015. "An Innovative Design of a Microtab Deployment Mechanism for Active Aerodynamic Load Control," Energies, MDPI, vol. 8(6), pages 1-13, June.
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    Cited by:

    1. Yiyi Zhang & Yi Li & Shizuo Li & Hanbo Zheng & Jiefeng Liu, 2020. "A Molecular Dynamics Study of the Generation of Ethanol for Insulating Paper Pyrolysis," Energies, MDPI, vol. 13(1), pages 1-11, January.

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