System reliability under cascading failure models with different load effect modes
System reliability under cascading failure models with different load effect modes
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DOI：
10.1002/qre.3304
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发表时间：
2023-02
影响因子：
2.3
通讯作者：
Xueying Song;Xu-jie Jia;Qinglai Dong;Dong Xu
中科院分区：
文献类型：
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作者：
Xueying Song;Xu-jie Jia;Qinglai Dong;Dong Xu
连锁故障是指微小扰动引发系统连锁反应故障，使灾难在系统中迅速蔓延，导致系统部分或全部崩溃的现象。传统的级联故障模型是建立在级联故障传播时间可以忽略的假设基础上的，不足以对所有实际的级联故障系统进行建模和分析。因此，有必要对具有连锁故障传播速度和不同负荷效应的连锁故障系统建立一种通用的分析方法。本文扩展了负荷效应模型，并考虑了连锁故障的传播速度。在模型中，考虑了连锁故障传播的时间。提出了三种载荷效应模式，分别考虑了剩余工作部件的数量、失效部件的影响范围以及失效部件与未失效部件之间的距离。此外，还分析了具有不同类型连锁故障的系统的可靠性，推导了可靠性指标的计算公式。数值例子来证明所提出的方法的应用。
Cascading failure is a phenomenon that minor disturbances trigger a chain reaction failure of the system, causing the disaster to quickly spread in the system and causing part or all of the system to collapse. Traditional cascading models that based on the assumption that the propagation time of cascading failures can be ignored are inadequate for modeling and analyzing all the practical cascading failure systems. It is necessary to develop a general methodology for the cascading failure systems with cascading failure propagation speed and different load effects. This paper derives new models which extend the load effect mode and consider the propagation speed of cascading failure. In the models, the time of the cascading failure propagation is considered. Three load effect modes are proposed that consider the number of remaining working components, the influence range of the failed parts, and the distance between the failed parts and the unfailed components. Additionally, the reliability of the systems with different types of cascading failures is analyzed, and formulas computing reliability indexes are derived. Numerical examples are provided to demonstrate the application of the proposed methodology.