LVRT capability of wind farms

Nowadays wind turbines are generally required to offer ancillary services similar to those provided by conventional generators. One of the most important services wind turbines must offer is to stay connected to the grid in fault situations delivering the reactive current specified in the recent grid codes. In this article, FACTS solutions for fixed speed wind farms such as DVR are presented as well as classic control and crowbar solutions for variable speed wind turbines. Real results are also presented.