中文摘要：

以状态检修为目的,研究了智能变电站保护系统的可靠性评估方法。首先从智能变电站技术特点出发,提出一种考虑逻辑节点的保护系统监测方法。根据状态检修的需要选取保护系统可靠性指标,并在此基础上建立了动态Markov模型,利用该模型定量评估保护系统在给定条件下的检修需求。最后以典型220 k V智能变电站为例说明了该评估模型的应用方法并做了相关分析。算例结果表明,该方法具有一定的可操作性,能够为智能变电站保护系统的检修决策提供一些参考。

英文摘要：

In order to realize the condition-based maintenance（CBM） of protection systems in smart substation, this paper proposes a new way to assess the reliability of protection systems. Based on the characteristics of smart substations, a monitoring method reflecting the changes of the protection system function in terms of logical nodes is presented. According to the needs of the condition-based maintenance, reliability indices of the protection system are chosen. Along with these indices, a dynamic Markov reliability assessment model is built to quantitatively calculate the maintenance requirement under given conditions. Finally, a typical 220 k V smart substation is utilized to illustrate the application method of the assessment model. The result shows that the method has certain operability, and could provide reference for maintenance decision-making of the protection system in smart substations.