A subway traction power supply system reliability evaluation method, device and equipment and a medium

Abstract

The invention discloses a subway traction power supply system reliability evaluation method, device and equipment and a medium. The method comprises the steps of building a fault tree model of a subway traction power supply system; calculating distribution parameters of subway traction power supply equipment faults; based on the fault tree model and the distribution parameters, simulating a traction power supply equipment and system state transition process by adopting a sequential Monte Carlo method, and calculating to obtain fault interval time, repair time, repair times and fault times; andcalculating the reliability index of the subway traction power supply system according to the fault interval time, the repair time, the repair frequency and the fault frequency. According to the invention, the fault tree model is established, the sequential Monte Carlo method is adopted to simulate the operation states of the equipment obeying different fault distribution types, the applicabilityis high, the reliability evaluation time indexes of the system fault average repair time and the system fault average interval time can be calculated, and the obtained reliability information is richer and more applicable.

Description

technical field [0001] The invention belongs to the technical field of subway traction power supply system evaluation, and in particular relates to a reliability evaluation method, device, equipment and medium of a subway traction power supply system. Background technique [0002] As the "heart" and "vessel" of the subway, the traction power supply system of the subway is mainly responsible for providing continuous power to the train. The safe and reliable operation of the traction power supply system is the guarantee for the safe and stable operation of the subway. If the subway traction power supply system cannot operate reliably, it will cause immeasurable economic losses and bad social impacts, and even endanger the lives of crew members and passengers in severe cases. [0003] In the prior art, there are qualitative and quantitative analysis and evaluation of the reliability rules of the traction power supply system by analyzing the reliability of the traction power sup...

AI Technical Summary

Problems solved by technology

However, because the failure rate of each traction power supply equipment in the system has a direct impact on the reliability evaluation results, the current reliability evaluation method does not consider the impact of equipment failure rates changing during its entire life cycle, resulting in inaccurate modeling

[0004] Traditional reliability evaluation methods mostly use analytical methods (such as fault enumeration method, minimum cut set method, etc.) to solve system reliability indicators, with clear physical concepts and high calculation accuracy. , the number of system states increases exponentially, the calculation amount increases sharply, and the calculated reliability index is relatively simple, which is difficult to apply to the reliability evaluation of large-scale complex systems

The construction and operation period of the subway is short, and there are few statistical samples of traction power supply equipment failure or outage. Quantitative evaluation of the traction power supply system requires a large amount of statistical data, and it is difficult to obtain equipment failure data

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