高速铁路10kV电力系统RAMS定量评估研究

Quantitative Evaluation Research on the 10 kV Power System for High-speed Railway

研究目的:高速铁路电力供电的安全性、可靠性在工程建设中备受关注。目前,我国对铁路电力供电方案的可靠性只有定性分析,没有定量指标,因而在高速铁路供电方案设计时,难以掌握方案的可靠性、安全性与方案的经济性之间的合理平衡。为了掌握各种铁路电力供电方案的可靠性指标,提出对高速铁路电力供电方案进行可靠性、可用性、可维护性和安全性定量评估,即RAMS指标定量评估,为今后工程设计提供借鉴。研究结论:为评估RAMS指标,针对高速铁路10kV配电网,建立了基于故障模式后果分析法的评估模型,利用自行开发的软件,研究了高速铁路10kV配电网的各种供电方案的RAMS指标,通过对比分析得出:在外部电源可靠的前提下,双贯通、单贯通加接触网备用的各种供电方式的供电可用率均在99.99%以上,电缆双贯通、负荷环网开关接入为最佳供电方案,供电可用率可达99.997%;单贯通的各种供电方式可用率低于99.99%,因此,双贯通供电方式是改善RAMS指标的关键措施。

Research purposes： In the construction of a high - speed railway, the security and reliability of power system is especially important. In the design of high - speed railway power system, as only qualitative analysis but no quantitative indices were considered in the past, it is difficult to keep proper balance between the reliability, security and the cost of the project. In order to get the indices, this paper presents a quantitative evaluation of the reliability, availability, maintainability and security, which is abbreviated as RAMS. It provides reference for construction design in future. Research conclusions：Especially to the 10 kV distribution system of high -speed railway, an RAMS evaluation model which is based on the failure mode and effect analysis （FMEA） is built. With a self- developed software, RAMS of all kinds of 10 kV distribution system in high -speed railway is evaluated. And through the contrastive analysis, some conclusions are found out as follows. If the extemal power supply is reliable, all kinds of power supply mode of double - continuous power line and single - continuous power line with contact line as reservation source have a availability ratio more than 99.99%. Double - continuous power line with power cable and load looped network switch is the best mode, which has an availability ratio 99. 997%. All the power supply modes of single - continuous power line have an availability ratio less than 99.99%. Above all, the power supply mode of double - continuous power line is a key step to get better RAMS indices.