【作者】 苏宏升； 李群湛； 郝文斌；

【Author】 Hongsheng Su Qunzhan Li Wenbin Hao (Electrical Engineering Institute,Southwest Jiaotong University,Chengdu,Sichuan,610031)

【机构】 西南交通大学电气工程学院；

【摘要】 在牵引变电所供电系统模型中,牵引变压器运行的质量和可靠性较高,而其母线馈出单元运行的可靠度相对较低,且该单元故障时主变压器回路仍须照常工作,变压器及其馈线单元的接线形式是串联。传统的可靠性分析方法是假定二者的寿命服从指数分布,基于最小路集进行可靠性数学分析、选用模型的精度有限。基于此,本文以马氏理论为基础,采用混合Erlang分布作为主变压器回路的寿命特征,而馈出单元的寿命为一般分布,得出的结果与一般串联系统比较,证明结果可靠。更多还原

【Abstract】 In traction power supply systems, operation qualities and reliabilities of the traction transformer loop are relatively high, but ones of bus output units are comparatively low, and the main loop still work while output loops have faults, connection formation between them is in series. Traditional reliability analysis method presumes their lifetime is exponential distribution, reliabilities are researched based on the least loop sets, however comparatively rough. According to markov theory, this paper considers the main loop life as mixed Erlang distribution, output unit lifetime is general distribution. The acquired results compared by ordinary series system are proved reliable.更多还原