A multi-modular axial flux machine is used for wind energy conversion systems (WECSs) where each module is connected to its own two-level converter. All converters are connected in series at the DC side to allow HVDC transmission. In the paper, an in-depth reasoning for the control of each individual voltage. A phase shift between PWM carrier signals of the neighbouring converters is implemented. A mathematical analysis is carried out. A criterion for the best choice of the phase shift to minimize dc voltage and torque harmonics is proposed.
DC Voltage and Torque Ripple Mitigation in Modular PMSG Drives for Off-Shore Multi-MW WECSs with Linear SPWM modulation
K. ElShawarby;A. Di Gerlando;G. M. Foglia;R. Perini
2019-01-01
Abstract
A multi-modular axial flux machine is used for wind energy conversion systems (WECSs) where each module is connected to its own two-level converter. All converters are connected in series at the DC side to allow HVDC transmission. In the paper, an in-depth reasoning for the control of each individual voltage. A phase shift between PWM carrier signals of the neighbouring converters is implemented. A mathematical analysis is carried out. A criterion for the best choice of the phase shift to minimize dc voltage and torque harmonics is proposed.File in questo prodotto:
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EPE_19_DC Voltage and Torque Ripple Mitigation.pdf
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