CHOPPER-BOOSTED CONVERTER FOR WIND TURBINES

摘要

A converter including a converter control for a wind turbine and a chopper, wherein the converter control includes a dynamic limit value which is allowable for a first tolerance time and a static limit value of the converter. Furthermore, an overcurrent module is provided which includes a limit value expander which is designed to increase the static limit value by a portion of the difference from the dynamic limit value as additional current, and a dynamic module which interacts with the limit value expander in such a way that overcurrents between the static limit value which is increased by the additional current and the dynamic limit value are routed in a first stage to the converter and in a second stage at least partially to the chopper, wherein a switch is made to the second stage after a second tolerance time.

主权项

1. A converter comprising a converter control for a wind turbine having a generator connected to the converter, a chopper, and an overcurrent module, wherein the converter control includes a dynamic limit value allowable for a first tolerance time and a static limit value of the converter, wherein the overcurrent module includes a limit value expander configured to increase the static limit value by a portion of the difference from the dynamic limit value as additional current, and a dynamic module configured to interact with the limit value expander such that overcurrents between the static limit value which is increased by the additional current and the dynamic limit value are routed in a first stage to the converter and in a second stage at least partially to the chopper, wherein a switch is made to the second stage after a second tolerance time.