Abstract
A new modular drivetrain for large wind turbines currently under development is presented. The electromechanical drivetrain has a direct-drive configuration with a modular flux-switching permanent magnet generator. The full-power converter consists of 12 parallel back-to-back 2L-VSC converter modules. A novel method of modulation is used to improve harmonic quality while maintaining a low switching frequency. Benefits of the new design include simplified manufacturing and transport, increased system availability due to fault-tolerance and redundance, and avoidance of an LCL filter. Measurements results are shown from a 500kW test rig.
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