Electrostatic discharge impacts on the main shaft bearings of wind turbines
Artikel i vetenskaplig tidskrift, 2023

This paper studies the electrostatic discharge effect in wind turbines, a possible trigger source of the main bearing current. A lab setup with a charge generator and downsized wind turbine was built to verify the impact of electrostatic discharge on the main bearing current. In the test, a fatal amplitude for the bearing current was found at only −93 mV driven voltage on the shaft. Compared with the bearing current driven by the common-mode voltage, the electrostatic discharge effect triggers the bearing breakdown at a lower shaft voltage but much higher bearing current amplitude. The results demonstrate that the electrostatic discharge effect is a pattern of the bearing current in wind turbines and is much more dangerous to the bearing.

Electrostatics

Electrostatic devices

Författare

Jian Zhao

Chalmers, Elektroteknik, Elkraftteknik

Xiangdong Xu

Chalmers, Elektroteknik, Elkraftteknik

Ola Carlson

Chalmers, Elektroteknik, Elkraftteknik

Wind Energy Science

23667443 (ISSN) 23667451 (eISSN)

Vol. 8 12 1809-1819

Detektera och motverka lagerström för längre livslängd av huvudaxellager

Energimyndigheten (2017-008071/44949-1), 2018-01-01 -- 2021-12-31.

Drivkrafter

Hållbar utveckling

Styrkeområden

Energi

Ämneskategorier

Fusion, plasma och rymdfysik

Annan elektroteknik och elektronik

DOI

10.5194/wes-8-1809-2023

Relaterade dataset

DOI: 10.5194/wes-8-1809-2023 URI: https://wes.copernicus.org/articles/8/1809/2023/

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Senast uppdaterat

2024-01-09