在调研国内外电压稳定可靠性评估研究的基础上，基于电压稳定的定义和分类，并结合电力系统可靠性评估方法，提出大干扰概率电压稳定性的概念，基于该概念构造能够综合考虑暂态和长期电压稳定性的大干扰电压稳定的可靠性指标，制定概率电压稳定的综合评价原则，在此基础上，提出基于电力系统可靠性评估的大干扰概率电压稳定的评估方法及相应的算法流程。实际电网算例结果表明，所提方法能以定量评估指标直观地表达系统电压稳定的安全特性，有助于提高电力系统运行的可靠性。

The voltage stability and reliability estimation research home and abroad was investigated. Combined with the power system reliability estimation method, it was presented that the concept of probabilistic voltage stability under large disturbance which was based on the definition and classification of stability. Based on the concept, the reliability index was constructed in which the transient and the long-term voltage stability could be considered. The comprehensive estimation principle was set up and the corresponding estimation method and its algorithm for probabilistic voltage stability calculation were also developed. The practical grid calculation result validates the effectiveness of the presented method which is helpful to figure out the operational reliability of the power system.