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\Traction power supply system to provide power for the high-speed train, the power supply system for driving signal, communication power supply, the entire power supply system is the core part of the high-speed railway, must meet the high reliability, high availability, low maintenance costs and low risk requirements. This article rely on the Beijing Railway Bureau Beijing Power Supply Section of Beijing-Tianjin Intercity maintenance of catenary reliability, based on the in-depth study of the theory, main contents and conclusions are as follows: (1) describes the reliability basic indicators of the theory, electrified railway catenary system and its major equipment, the exponential distribution failure probability density function and parameters meaning Catenary equipment failure failure distribution fitting method and the catenary system reliability, fault tree analysis method , and gives the the catenary system reliability analysis process. (2) to make the Beijing-Tianjin Intercity catenary maintenance management system needs analysis, including the overall functionality of the system module design and performance requirements, structural design and system architecture. On the analysis of induction and consolidation since the launching of the Beijing-Tianjin Intercity (July 2008 to December 2009) All equipment defects and fault information, refer to the catenary equipment maintenance procedures, all equipment is divided into 12 categories, 35 types of equipment, 256 kinds of defects or failure and the corresponding measures of maintenance, database design based on the use of VB and relational database developed Beijing-Tianjin Intercity catenary maintenance management system, to manage all of the equipment and its failure to classify, analyze various equipment supply work area catenary number of equipment defects and failures and time distribution, obtained through the analysis of the statistical results, the law of the catenary equipment failure. (3) Beijing-Tianjin Intercity catenary system reliability analysis and calculation, application maintenance management system, catenary defects in eight key equipment failure statistics, calculate the failure rate, combined with the analysis of other equipment failures, catenary system failure events, as well as the size of the failure rate of the Fault Tree. Establish catenary system failure fault tree model, first with the downstream analysis of fault tree minimal cut sets, the application of fault tree quantitative analysis theory, the Beijing-Tianjin Intercity catenary system reliability is calculated as 0.99356, unreliable 0.00644, and mean time between failures of 0.425 years. These research results have certain guiding significance to improve the reliability and operation of the Beijing-Tianjin Intercity catenary system maintenance and management level.
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