Circuit arrangement and method for the compensation of harmonic currents

Circuit for coupling a harmonic converter formed of controllable rectifiers to collector bus bars of a three-phase a-c network to compensate harmonic currents in the network, the harmonic converter having an input and an output, including a rectifier and a choke connected to said input, comprising a damped low Q wideband highpass filter covering the entire frequency range of disturbing harmonics, said filter having a choke connected in parallel with a damping resistor, and a capacitor connected in series therewith, said capacitor being connected between the output of the harmonic converter and each collector bus bar of the three-phase a-c network and said parallel connected choke and resistor being connected between the output of the harmonic converter and ground.