中文摘要：

为了提高牵引变电所供电可靠性,在考虑所内一次设备的情况下提出一种结合故障模式后果分析（FMEA）与动态故障树分析（DFTA）的方法来分析牵引变电所的可靠性。 首先根据FMEA 的工作结果来分析牵引变电所的故障原因,提出有针对性的预防措施;然后采用DFTA 建立高铁牵引变电所的故障模型并定性定量分析,找出牵引变电所的薄弱环节。 最后与传统故障树计算结果进行对比,结果表明：传统故障树建模存在较大误差,两种方法的结合相比仅使用一种可靠性分析方法更为实用。

英文摘要：

To improve the reliability of traction substation, the reliability of the electric traction substation is analyzed in view of the devices in the high-speed railway traction substation based on failure mode and effect analysis （FMEA） and dynamic fault tree analysis （DFTA）. First, the reason for the failure of traction substation is analyzed according to the results of FMEA to seek targeted preventive measures, and then DFTA is employed to establish the high-speed railway traction substation fault model for qualitative and quantitative analysis to find out the weakness of the traction substation. Finally, comparison with the traditional fault tree calculation is conducted. The results show that there is a big error in the traditional fault tree modeling, and the combination of the two methods is more practical in reliability analysis than only one method.