07102247 is referenced by 30 patents and cites 20 patents.

The invention relates to a circuit with a variable rotational speed to be used particularly in a wind power plant, comprising a double fed asynchronous generator (DASM), a crow-bar, an additional resistor (R15) and a converter. In order to meet the requirements of the network provider, whereby a particularly permanent coupling to the network should be ensured so that the wind power plant can start up and stabilize the network during and after medium voltage short circuit in the network, the additional resistor can be regulated with the aid of a fast switch in such a way that the converter can be provisionally disconnected at least partly in case of a short circuit in the network. The rotor current is momentarily assumed by the additional resistor and disconnected after the rotor short circuit current dies out so that the converter can be subsequently connected once again and so that it can supply the desired active short circuit current to the network.

Title
Circuit arrangement and methods for use in a wind energy installation
Application Number
10/502726
Publication Number
7102247 (B2)
Application Date
January 23, 2003
Publication Date
September 5, 2006
Inventor
Lorenz Feddersen
Flensburg
DE
Agent
Cantor Colburn
Assignee
Vestas Wind Systems
DK
IPC
H02P 9/48
View Original Source