Through analysis of instability probabilistic indices ( plos ), it is found that in different installation site, or with different control system parameters, or using different control strategies, the effects of facts to hybrid power system are different . therefore, how to further develop advantages of facts elements is the emphasis of the future work 通过对系统的失稳概率指标(p_(los))的分析,得出不同的安装地点、不同的控制系统参数、不同的控制措施的采用,facts元件对混合系统的稳定性影响也不尽相同,因此如何合理有效地将facts元件的优点发挥到最大将是以后工作的重点。