An electrical converter (12) is interconnected via a filter (14) with an electrical load (16) or an electrical power source (20). A method for controlling the converter (12) comprises the steps of: receiving a reference flux (psi *i) for the electrical converter (12); determining output signals (y) comprising currents and/or voltages measured in the filter (14); determining an estimated flux (psi i) from the output signals (y); determining a corrective flux (psi i,damp) from the output signals (y) based on a mathematical model of the filter (14) and a quadratic cost function; determining control input signals (u) for the electrical converter (12) based on a sum of the estimated flux (psi i) and the corrective flux (psi i,damp); controlling the converter (12) with the control input signals (u); and algorithmic filtering of at least one of the output signals (y) by applying a signal filter (32) to the at least one output signal, which is designed for amplifying the at least one output signal at a resonance frequency (40) of the filter (14), whereby the corrective flux (psi i,damp) is determined from the filtered output signals.