Common mode voltage impact on wind turbine main shaft bearing
Paper in proceeding, 2021

Main shaft bearing is a critical component in the wind turbine rotating system. But the bearing voltage, which is generated by the potential differences between the bearing and the main shaft, often causes the downtime of the main shaft bearing. The potentials are induced by multi-physical phenomenon, such as fast-switching power electronics interference and electrostatic charge accumulations, may cause damages on bearing and electromagnetic interference (EMI). Base on the field test result of the bearing current, common-mode voltage (CMV) of the converters is considered as the main source during normal operation. In this paper, a circuit model is proposed to study the two different CMV transmission path to the main shaft bearing and a downsized wind turbine is built and tested in lab environment to verify and improve the model.

Impedance model

EMI

wind energy

bearing currents

Author

Jian Zhao

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Xiangdong Xu

Chalmers, Electrical Engineering, Electric Power Engineering, Power grids and Components

Ola Carlson

Chalmers, Electrical Engineering

2021 23rd European Conference on Power Electronics and Applications, EPE 2021 ECCE Europe


9789075815375 (ISBN)

23rd European Conference on Power Electronics and Applications, EPE 2021 ECCE Europe
Ghent, Belgium,

Subject Categories

Vehicle Engineering

Fusion, Plasma and Space Physics

Other Electrical Engineering, Electronic Engineering, Information Engineering

More information

Latest update

11/23/2021