Abstract
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.
Highlights
At present, the maintenance mode of the railway traction power supply system (TPSS) in China is a combination of scheduled maintenance, fault repair and daily inspection, among which the scheduled maintenance works as the dominant maintenance method
This paper introduces a preventive opportunistic maintenance (POM) method for TPSS based on equipment reliability
In order to deal with the aforementioned problems, this paper proposes a POM method for TPSS based on equipment reliability
Summary
The maintenance mode of the railway traction power supply system (TPSS) in China is a combination of scheduled maintenance, fault repair and daily inspection, among which the scheduled maintenance works as the dominant maintenance method. The opportunistic maintenance strategy is applied to optimize the maintenance costs of the system, but the reliability requirements of the equipment are not considered during the optimization process To solve this problem, Zhao et al [18] considered the reliability of each component, and introduced the concept of opportunistic maintenance based on the preventive maintenance mode. A POM model for the TPSS is established, and the optimal maintenance scheme is achieved by minimizing the total power outage time during the planned operation cycle of the TPSS. Compared with the traditional fixed cycle preventive maintenance mode, the proposed method can effectively reduce power outage time and improve maintenance efficiency.
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