Patent ID: 8050060

Claim:
A method for operating a converter circuit, the converter circuit having a converter unit with a large number of drivable power semiconductor switches and with a three-phase electrical AC voltage system, the method comprising: driving the drivable power semiconductor switches by means of a drive signal (S A ) formed from a control signal ((S R ); forming the control signal (S R ) by adjusting an H-th harmonic component of system currents (i NH ) to a system current setpoint value (i NHref ), where H=1, 2, 3, . . . ; and forming the system current setpoint value (i NHref ) by adjusting an H-th harmonic component of system voltages (u NH ) to a predeterminable system voltage setpoint value (u NHref ), the control difference (u NHdiff ) from the H-th harmonic component of the system voltages (u NH ) and the system voltage setpoint value (u NHref ) being weighted by a system impedance (y NH ) determined with respect to the H-th harmonic component.