An experimental field study of the grounding system response of tall wind turbines to impulse surges

Gazzana, Daniel S. (EMC Laboratory, Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland ; Department of Automation and Energy, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil) ; Smorgonskiy, Alexander (EMC Laboratory, Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland ; School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland) ; Mora, Nicolas (Montena Technology, Rossens, Switzerland) ; Sunjerga, Antonio (EMC Laboratory, Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland ; Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split, Split, Croatia) ; Rubinstein, Marcos (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland) ; Rachidi, Farhad (EMC Laboratory, Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland)

In this work, an experimental investigation of the grounding system behavior of tall wind turbines in both time and frequency domains is presented. Two scenarios were considered: in the first one, measurements were carried out on the grounding system embedded in the wind turbine foundation, before assembly of the wind turbine itself; in the second one, the complete wind turbine (tower, nacelle and blades) was included. The study also presents an enhanced signal processing technique for noise cancelation in a harsh electromagnetic environment. In the analysis, the frequency dependence of the grounding impedance was evaluated and a numerical simulation in steady state was performed. The simulation model leads to a satisfactory representation of the studied system. Preliminary results show that the evaluated grounding impedance is not significantly affected by the presence of the complete wind turbine at the evaluated frequencies.


Keywords:
Article Type:
scientifique
Faculty:
Ingénierie et Architecture
School:
HEIG-VD
Institute:
IICT - Institut des Technologies de l'Information et de la Communication
Date:
2018-07
Pagination:
7 p.
Published in:
Electric Power Systems Research
Numeration (vol. no.):
2018, vol. 160, pp. 219-225
DOI:
ISSN:
0378-7796
Appears in Collection:

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 Record created 2019-10-29, last modified 2019-10-29

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