Method for operating a converter circuit and apparatus for implementing the method

PQnPdiffQdiffA method is disclosed for the operation of a converter circuit, wherein the converter circuit has a converter unit having a multiplicity of actuatable power semiconductor switches and an LCL filter which is connected to each phase connection of the converter unit, in which the actuatable power semiconductor switches are actuated by means of an actuation signal (S) formed from a hysteresis active power value (d), from a hysteresis reactive power value (d) and from a selected flux sector (θ). The hysteresis active power value (d) is formed from a differential active power value (P). In addition, the hysteresis reactive power value (d) is formed from a differential reactive power value (Q). An apparatus for carrying out the method is also disclosed.