IMPROVED FAULT CORRECTION BEHAVIOR OF NETWORK-COUPLED INVERTER SYSTEMS ON GENERATOR DRIVES WITH VARIABLE ROTATIONAL SPEEDS

摘要

The invention relates to a method for reconnecting network-coupled inverter systems on generator drives with variable rotational speeds according to a fault correction of a network disturbance. The inverter Inv undergoes a reconnection to the network N, said reconnection being matched to the generator section St over time such that the connection time is determined in accordance with the vibrational state of the generator section St, said vibrational state being triggered by the network disturbance at the point in time to. With this method, referred to as a soft ride through, the torsional vibration due to the occurrence of the network disturbance and the torsional vibration due to the reconnection are matched such that the torsional increase is minimized, advantageously producing a mechanically gentle fault correction behavior.