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Evaluation of Wind Turbine Earthing System

  • S. A. PastromasEmail author
  • I. A. Naxakis
  • S. I. Xerra
  • K. N. Koutras
  • E. C. Pyrgioti
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 598)

Abstract

The majority of the wind farms are constructed in high altitudes and isolated areas which put in risk the wind turbines due to their exposure to lightning activity and their high total height. Wind turbine earthing system is part of its lightning protection design according to IEC61400-24 and shall ensure a safe path for the lightning current hitting the wind turbine and a safe working environment for the live beings. The earthing system contributes also in earth fault current dissipation and is considered in the electrical studies. In the current paper, the performance of a wind turbine earthing system of an existing wind farm with medium soil resistivity is discussed, based on simulations in ATP-EMTP which is suitable for steady-state and transient studies. Two cases (Case A and Case B) were examined relatively to the lightning current, i.e. 5 kA and 150 kA for the same concrete and soil resistivity, applied at the base and the top of the tower, respectively. In Case A, two occasions were considered by using or not an extra vertical rod placed at the base of the tower. In Case B, two scenarios were assumed by considering or not the ionization effect. It was noticed the reduction of the voltages and currents, when the ionization effect was regarded. The results can be used to evaluate the earthing system performance and the need for improvement to ensure a reliable operation of the whole asset mitigating the operational risk for the equipment.

Keywords

Earthing Lightning Wind turbine Safety 

References

  1. 1.
    IEC 61400-24, Wind turbines Part 24: Lightning protection, edition 1.0 (2010)Google Scholar
  2. 2.
    ANSI/IEEE Std 80-2000, IEEE Guide for Safety in AC substation grounding (2000)Google Scholar
  3. 3.
    IEC62305-3, Protection against lightning Part 3: Physical damage to structures and life hazard (2006)Google Scholar
  4. 4.
  5. 5.
    ANSI/IEEE Std 81.2-1983, IEEE Guide for measuring earth resistivity, ground impedance and earth surface potentials of a ground system (1983)Google Scholar
  6. 6.
    Zeng, R., Gong, X., He, J., Zhang, B., Gao, Y.: Lightning impulse performances of grounding grids for substations considering soil ionization. IEEE Trans. Power Deliv. 23(2), 667–675 (2008)CrossRefGoogle Scholar
  7. 7.
    Zhang, T., Zhang, Y., Tan, X.: Study on overvoltage of signal line in wind turbine by lightning strike, Shanghai (2014)Google Scholar
  8. 8.
    Yanqing, G., Rong, Z., Jinliang, H., Xidong, L.: Loss transmission-line model of grounding electrodes considering soil ionization of lightning impulse. In: 2002 3rd International Symposium on Electromagnetic Compatibility, 21–24 May 2002, pp. 294–298 (2002)Google Scholar
  9. 9.
    Mousa, M.A.: The soil ionization gradient associated with discharge of high currents into concentrated electrodes. IEEE Trans. PWRD 9(3), 1669–1676 (1994)Google Scholar
  10. 10.
    Rakov, V.A.: Lightning discharge and fundamentals of lightning protection. J. Light. Res. 4(Suppl. 1: M2), 3–11 (2012)Google Scholar
  11. 11.
    Naxakis, I., Mihos, G., Pastromas, S., Pyrgioti, E.: Examining the operation of the grounding system of a PV installation. In: Proceedings of the 2018 IEEE International Conference on High Voltage Engineering and Application (ICHVE), Athens, Greece, 10–13 September 2018 (2018)Google Scholar
  12. 12.
    Pastromas, S.A., Maimaris, K., Stasinos, I.K., Naxakis, I.A., Pyrgioti, E.C.: Assessment of wind turbine grounding system. In: Proceedings of the 2018 IEEE International Conference on High Voltage Engineering and Ap-plication (ICHVE), Athens, Greece, 10–13 September 2018 (2018)Google Scholar

Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • S. A. Pastromas
    • 1
    Email author
  • I. A. Naxakis
    • 1
  • S. I. Xerra
    • 2
  • K. N. Koutras
    • 1
  • E. C. Pyrgioti
    • 1
  1. 1.Department of Electrical and Computer EngineeringUniversity of PatrasRion-PatrasGreece
  2. 2.Department of PhysicsUniversity of PatrasRion-PatrasGreece

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