中文摘要：

全面监测并掌握地铁牵引供电系统的健康状态对城市地铁的安全可靠运行影响至关重要,为定量评估地铁牵引供电系统的健康状态,将多层免疫原理应用其中,采用层次分析法（AHP）建立牵引供电系统分层分析模型并划分出各个层次,构建其免疫监控系统的结构,在此基础上通过成对比较矩阵得到初始相对权重,并采用模糊统计的方法,通过引入模糊隶属度的概念来修正权重,以消除主观差异性和矩阵阶数对评估结果的影响,结合主观性和客观性的优势给出了更加精确的综合评估方法。实例分析结果表明,该方法能全面、准确、直观地给出地铁牵引供电系统、各子系统以及各元件的健康状态信息,并确定需要维护的子系统及元件。

英文摘要：

Comprehensive monitoring and having a good command of the health status of Metro Traction Power Supply System are critical to ensure the safe and reliable operation of the system. To assess the health status of Metro Traction Power Supply System quantitatively, the multi-layer immune principle was applied. The analyt- ical hierarchy process （AHP） was used to establish the layered analysis model for the Metro Traction Power Supply System, to divide different layers and to build the structure of the immune system for the Metro Trac- tion Power Supply System, whereby the initial relative weights were obtained by pairwise comparison matrix. Further, the fuzzy statistics method and the concept of fuzzy membership degree were introduced for weight modification, to eliminate the influence of the subjective differences and the matrix dimensions on the results of the assessment. A more accurate and comprehensive assessment method was provided combining the advantages of subjectivity and objectivity. According to the findings of the case study, this method can provide comprehen- sive, accurate and intuitive information on the health status of the Metro Traction Power Supply System with each AHP subsystem and each device and can identify the subsystems and devices that require maintenance.