中文摘要：

随着广域测量系统（WAMS）的广泛应用，其系统自身的可靠性显得尤为重要。WAMS可靠度指系统能够成功完成数据采集和数据分析的概率，它是评价WAMS性能的一个重要指标。文中以可靠性理论为指导，根据集中、分布式系统的结构特点，对WAMS的可靠性进行了深入研究。将WAMS等效为监控中心和数据采集2个子系统，基于马尔可夫模型提出监控中心可用度的评价方法；以串联、并联和k／n判决模型为基础，建立了数据采集子系统的可靠度计算方法。最后以IEEE14节点的WAMS为例进行验证分析。

英文摘要：

With the wide application of wide area measurement system （WAMS）, its reliability becomes more and more important. Reliability is an important indicator to evaluate the performance of a WAMS. It means the probability for the system to complete data collection and data analysis. According to the structural characteristics of centralized and distributed systems, this paper makes an in-depth research on the WAMS reliability based on the reliability theory. A WAMS system can be divided into two sub-systems, namely monitor center system and data acquisition system. The availability of monitor center system can be evaluated by use of the Markov model, while the data acquisition system by use of series model, parallel model and k/n judgment model. The research model is validated with the reliability evaluation of IEEE 14 WAMS system.