New Hybrid Power Filter Topology and Control for Application in Industrial Networks

The paper presents the new structure and control strategy of the Hybrid Power filter (HPF) with a split passive part. Its impedance is divided into two parts tuned to 50Hz and 250 Hz. The HPF topology is very efficient to mitigate harmonic currents especially for higher frequencies. The HPF functionality is influenced by the grid inductance changes only negligibly. The new HPF characteristics were compared with those for a standard HPF and a classic passive compensation by the simulation done in the Matlab/Simulink environment. The voltage and current values and their harmonic spectra were also measured in the real industrial plant Remarkplast, Ltd. under different conditions