Patent ID: 11870265
Assignee: WOBBEN PROPERTIES GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  F  Y | IPC F  H

Claim 5:
6. The method as claimed in claim 1, comprising:
determining an intermediate circuit operating voltage for the intermediate circuit voltage based on an operating point of the wind turbine to feed in the electrical power in the normal mode;
in response to detecting the network fault, determining an intermediate circuit fault voltage for the intermediate circuit voltage based on the determined intermediate circuit operating voltage;
in response to detecting the network fault, setting a cut-off voltage or an upper cut-off voltage to the intermediate circuit fault voltage to control the intermediate circuit voltage to the intermediate circuit fault voltage using the chopper circuit; or
after the end of the network fault, increasing the intermediate circuit fault voltage, the cut-off voltage or the upper cut-off voltage.