| 摘要 |
<p>A method for operating a converter circuit is specified, wherein the converter circuit has a converter unit (2) with a plurality of drivable power semiconductor switches and is connected to a three-phase electrical AC voltage network (1) by means of a transformer, in which method the drivable power semiconductor switches are driven by means of a drive signal (SA) formed from a control signal (SR). In order to attenuate oscillations of a network voltage (UG) above the fundamental frequency, a filtered network current (iGTP) is formed by means of filtering according to a low-pass characteristic of a network current (iG), a filtered transformer inductance voltage (ULTTP) is formed by means of filtering according to a low-pass characteristic of a transformer inductance voltage (uLT) formed from the network current (iG), a filtered network voltage (UGTP) is formed by means of filtering according to a low-pass characteristic of a network voltage (uG), and the control signal (SR) is formed by adding a controller voltage (uR), the filtered transformer inductance voltage (ULTTP) and the filtered network voltage (UGTP), wherein the controller voltage (uR) is formed by adjusting the filtered network current (iGTP) to a desired network current value (iGref). An apparatus for carrying out the method is also specified.</p> |
