Cascading tripping out of numerous wind turbines in China: Fault evolution analysis and simulation study

Cascading tripping out of numerous wind turbines will threaten the security of power grid with high wind power penetration. It is a new security problem caused by large scale wind power integration in China. This paper focuses on those failures that happened successively in Northwest and North China 2011. Firstly, analyzes the typical failure evolution process over spatial and temporal scales, and then studies how important factors impact those failures which sweep over the total wind farm clusters because of unusual voltage fluctuation from three aspects: the weak network, the wind power integration style and the operating condition. In addition, this paper also discusses the internal mechanism of those cascading tripping out failures by simulation verification on scene data.