METHOD AND CONTROL UNIT FOR THE SHORT CIRCUIT CURRENT REDUCTION IN A DOUBLE-FED ASYNCHRONOUS MACHINE

摘要

The invention relates to a method for the operation of a double-fed asynchronous machine (16) on a circuit in case of transient supply voltage changes, wherein a frequency converter (18) is disposed between the rotor (14) of the asynchronous machine and the circuit (30), said frequency converter having a converter (20) on the machine side, and a converter (22) on the circuit side, and wherein the stator (12) of the asynchronous machine is connected to the circuit (30). In order to reduce or eliminate any equalizing currents or short-circuit currents in the transient supply voltage changes, the invention proposes that, after detecting a transient supply voltage change, a compensation current be imprinted into the circuit by means of the converter (22) on the circuit side.