基于遗传算法的牵引供电系统可靠性建模  

Modeling of Reliability of Traction Power Supply System Based on Genetic Algorithm

作　　者：谢将剑[1] 吴俊勇[1] 吴燕[1] 

机构地区：[1]北京交通大学电气工程学院,北京100044

出　　处：《铁道学报》2009年第4期47-51,共5页Journal of the China Railway Society

基　　金：国家自然科学基金资助项目(60674005);北京交通大学校基金资助项目(EJ07001)

摘　　要：采用威布尔分布作为可靠性模型,提出一种基于遗传算法的牵引供电系统及其各设备的可靠性模型拟合方法。以京广铁路郑州南牵引供电系统为例,根据其统计的14年设备失效率信息,通过拟合得到该供电系统各设备的可靠性模型。拟合优度的K-S和W2检验结果表明,威布尔分布模型是一种适合用于牵引供电设备特别是接触网设备的可靠性模型。将牵引供电系统分为牵引变电所和接触网两个子系统,在供电设备可靠性研究的基础上,基于故障树分析法建立了牵引变电所和接触网可靠性模型,综合分析得到整个牵引供电系统的可靠性模型,提出并计算系统的有效寿命,为今后维修计划的制定提供科学依据。数据还表明,牵引供电系统的可靠性在很大程度上取决于牵引接触网的可靠性。Using the Weibull distribution model as the model of reliability, a fitting method based on the Genetic Algorithm （GA） for the models of reliability of the traction power supply system and its equipment is pro- posed. This approach has been applied in modeling of reliability of the Southern Zhengzhou traction power-supply system of the Jing-Guang Railway using its real failure ratio data over the past 14 years. K-S and W^2 good- hess-of-fit test results show that the Weibull distribution model is appropriate for modeling of reliability of the traction power supply system, especially for the catenary lines. The traction power supply system is divided into two subsystems： the traction power supply substation subsystem and catenary subsystem. On the basis of study of reliability of the power supply equipment and with the fault tree analysis method, the models of reliability of the traction power supply substation subsystem and catenary subsystem, and then the model of reliability of the whole traction power supply system, are established. The concept of the system life-span is proposed and calculated, thus providing a scientific basis for optimizing the future maintenance schedule. The results also indicate that the reliability of the traction power supply system depends on the catenary system to a large extent.

关 键 词：牵引供电系统 遗传算法 可靠性 故障树分析法 威布尔分布 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]