Reduction of conducted emission in a three-phase active power filter in accordance with the IEC 61000-6-4 standard

The paper presents a method of reducing the emission of conducted disturbances generated by a three-phase active power filter used to reduce higher harmonics and reactive power compensation. The analysis of the output filter based on the LCL topology including the parasitic elements and the selection of elements of the additional EMI filter was shown in the paper. Theoretical analysis was confirmed by simulations and measurements in the certified laboratory of electromagnetic compatibility. The results made it possible to confirm compliance with IEC 61000-6-4 and implement the production of the analyzed active power filter.