Conventional maintenance mode for the traction power supply system (TPSS) is to perform scheduled regular maintenance activities for power supply equipment, while such maintenance mode may result in undue maintenance tasks and low efficiency due to different degradation processes of different sorts of equipment. To address this problem, this paper introduces a preventive opportunistic maintenance (POM) method for TPSS based on equipment reliability. Firstly, a POM model is established by considering the equipment reliability degradation process based on Weibull distribution. Then, by considering the total power outage time in the planned operation cycle of TPSS as the optimization objective, the optimal maintenance scheme of TPSS is formulated by iterative method of maintenance strategies. The proposed method is verified by introducing practical maintenance strategies and fault record data of the traction transformer, circuit breaker and disconnector in an actual TPSS of a railway administration. Results show that the presented method can make full use of the existing fault data to develop a POM scheme for TPSS. It can improve maintenance efficiency and reduce power outage time, providing guidance to formulate scientific maintenance strategies for TPSS.

中文翻译：

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基于设备可靠性的铁路牵引供电系统预防性机会维护方法

牵引电源系统（TPSS）的常规维护模式是对供电设备执行定期的定期维护活动，而这种维护模式可能会由于不同类型设备的不同退化过程而导致维护任务过多，效率低下。针对这一问题，本文介绍了一种基于设备可靠性的TPSS预防性机会维护（POM）方法。首先，考虑了基于威布尔分布的设备可靠性下降过程，建立了POM模型。然后，以TPSS计划运行周期中的总停电时间为优化目标，采用维修策略的迭代方法，制定了TPSS的最佳维修方案。通过在铁路管理部门的实际TPSS中引入牵引变压器，断路器和隔离开关的实用维护策略和故障记录数据，对所提出的方法进行了验证。结果表明，所提出的方法可以充分利用现有的故障数据来开发用于TPSS的POM方案。它可以提高维护效率并减少停电时间，为制定科学的TPSS维护策略提供指导。