Analysis on Cascading Trip-off of DFIG Wind Farms and Its Improved Measures

The cascading trip-off events of large-scale wind farms have serious impacts on power systems security and stability. Firstly, the occurrence and development process of cascading trip-off of large-scale wind farms are introduced in detail. Then the evolution mechanism of the events is mainly analyzed, and its key issues are pointed, based on which control measures are proposed to avoid the occurrence of cascading trip-off of wind farms. In the end, the model is built by the DIgSILENT / PowerFactory simulation software, which can simulate cascading trip-off of wind farms very well. In addition, the cascading trip-off case of large-scale wind farms and its improved measure are compared to explore and analyze the cascading trip-off events of wind farms.