Reliability assessments for two types of balanced systems with multi-state protective devices
Reliability assessments for two types of balanced systems with multi-state protective devices
复制标题
DOI：
10.1016/j.ress.2022.108852
复制
发表时间：
2022-09
期刊：
影响因子：
--
通讯作者：
Xiaoyue Wang;Ru Ning;Xian Zhao;Congshan Wu
中科院分区：
文献类型：
--
作者：
Xiaoyue Wang;Ru Ning;Xian Zhao;Congshan Wu
在现有的研究中，保护装置对平衡系统可靠性的积极作用没有得到重视，对保护装置的研究在触发和保护机制方面是有限和不足的。结合工程实际应用，分别从动平衡和静平衡的角度建立了多状态保护平衡系统的可靠性模型。在动态平衡系统中考虑了再平衡机制，在静态平衡系统的失效准则中考虑了系统不平衡。在这两种模型中，根据平衡系统各自的特点，提出了新的保护装置触发机制。通过引入不同的还原因子，提出了保护装置在不同阶段运行时的可变保护机制。保护装置减少了冲击的综合影响和内部退化施加在新型号的单位。采用马尔可夫过程嵌入法和蒙特卡罗仿真相结合的方法验证了所提模型的可靠性。工程实例验证了系统的适用性和方法的正确性。
In the existing studies, the positive effects of a protective device on the reliability of balanced systems have not been attached importance, and the research on protective devices is limited and insufficient with respect to the triggering and protection mechanisms. Driven by practical engineering applications, this paper establishes two reliability models for balanced systems with multi-state protective devices from the perspectives of dynamic and static balanced concepts, respectively. The rebalanced mechanisms are considered in the proposed dynamic balanced system, and system imbalance is included in the failure criteria of the proposed static balanced system. In both models, new triggering mechanisms of protective devices are proposed based on the respective characteristics of the balanced systems. Moreover, variable protection mechanisms of the devices are proposed by introducing different reduction factors when the protective device operates in different stages. The protective devices reduce the integrated impact of shocks and internal degradation exerted on the units in the new models. The Markov process imbedding method combined with Monte-Carlo simulation is employed to derive the reliability of the proposed models. The applicability of proposed systems and correctness of the method are validated by practical engineering applications.