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Comparative Analysis of Bearing Current in Wind Turbine Generators
- Source :
- Energies; Volume 11; Issue 5; Pages: 1305
- Publication Year :
- 2018
- Publisher :
- MDPI AG, 2018.
-
Abstract
- Bearing current problems frequently appear in wind turbine systems, which cause wind turbines the break down and result in very large losses. This paper investigates and compares bearing current problems in three kinds of wind turbine generators, namely doubly-fed induction generator (DFIG), direct-drive permanent magnet synchronous generator (PMSG), and semi-direct-drive PMSG turbines. Common mode voltage (CMV) of converters is introduced firstly. Then stray capacitances of three kinds of generators are calculated and compared through the finite element method. The bearing current equivalent circuits are proposed and simulations of the bearing current are carried out. It is verified that the bearing currents of DFIGs are more serious than the two kinds of PMSG, while common mode current (CMC) of the direct-drive PMSG is much greater than the other two types of wind turbine generators.
- Subjects :
- Control and Optimization
Bearing (mechanical)
Wind power
Renewable Energy, Sustainability and the Environment
Computer science
business.industry
020209 energy
020208 electrical & electronic engineering
Induction generator
Energy Engineering and Power Technology
02 engineering and technology
Permanent magnet synchronous generator
Turbine
law.invention
law
Control theory
0202 electrical engineering, electronic engineering, information engineering
Equivalent circuit
Electrical and Electronic Engineering
Current (fluid)
business
Engineering (miscellaneous)
bearing current
common mode current
doubly fed induction generators
permanent magnet synchronous generators
wind turbine generator
Energy (miscellaneous)
Subjects
Details
- ISSN :
- 19961073
- Volume :
- 11
- Database :
- OpenAIRE
- Journal :
- Energies
- Accession number :
- edsair.doi.dedup.....6820c94f3c0c7e0f3e8a7fed23cf9f4e