Patent ID: 9088229
Filing Date: 2015-07-21
Classification: B63H,B63J,H02J,H02M,H02P,Y02T

Abstract:
1. A shaft-driven generator system comprising: a network implemented as an island network, a shaft-driven generator, a network-side inductance, and a DC-link converter, wherein the DC-link converter comprises an AC/DC converter connected on an input side to the generator, and a DC/AC inverter connected on an output side to the island network without an interconnected network-side filter, with the converter connected to the inverter by a DC link circuit, wherein the inverter has at least two phase modules, each phase module having an upper valve branch and a lower valve branch, each upper valve branch and each lower valve branch having a plurality of two-pole sub-systems electrically connected in series, wherein each two-pole sub-system comprises a series circuit formed of two gate-controlled turn-off semiconductor switches and diodes connected antiparallel with the semiconductor switches in one-to-one correspondence, and a unipolar storage capacitor electrically connected in parallel with the series circuit, and wherein a number of the two-pole sub-systems electrically connected in series in each of the upper valve branches and the lower valve branches is selected so as to allow use of low-voltage gate-controlled turn-off semiconductor switches.