| 摘要 |
The present disclosure relates to a method for reducing lower order harmonics of a power converter. The method comprises, for each phase leg of the converter: Obtaining S1 a voltage reference Uref for the phase leg. For a present sample k, obtaining S2 a flux error Ψerror of the output voltage of the leg. Dividing S3 the first sample flux error Ψerror by a time period to obtain an average voltage error Uavg error over said time period. Subtracting S4 an obtained processed average voltage error Uproc.avg error, based on the average voltage error Uavg error, from the voltage reference Uref to obtain a modified voltage reference Umod ref for the phase leg. Providing S5 the modified voltage reference Umod ref to a modulation unit 12 of the converter for controlling the phase leg. |
