考虑信息设备故障的综合能源信息物理系统可靠性分析

Reliability Analysis of Integrated Energy Cyber Physical System Considering Information Equipment Failure

综合能源信息物理系统(integrated energy cyber physical system,IECPS)中信息系统失效将会对系统可靠性造成一定程度的影响,为研究信息系统中信息设备故障对综合能源系统可靠性影响,定义了信息物理子系统的概念并提出了一种适用于综合能源信息物理系统的可靠性评价指标。首先,基于马尔科夫过程蒙特卡洛法(Markov chain Monte Carlo,MCMC)建立多时段状态概率模型。其次,建立了综合能源信息物理系统模型,分别利用复杂网络理论和能源集线器技术建立了信息系统静态模型和物理系统数学模型,并对信息系统作用过程进行分析和建模。最后,利用提出的可靠性评价指标同时考虑系统供能水平,分析了不同情况下信息设备故障对综合能源系统可靠性的影响,以及系统可靠性对不同信息设备的敏感程度。算例以某综合能源信息物理系统为例,按照上述评估指标和方法评估信息设备故障对综合能源系统可靠性影响程度,结果可为综合能源信息物理系统的规划和运行提供参考。

The failure of information systems in the integrated energy cyber physical system(IECPS)will have a certain degree of impact on the reliability of the system.In order to study the impact of information equipment failure on the reliability of the integrated energy system,the concept of cyber-physical subsystem is defined and a reliability evaluation index suitable for the integrated energy cyber-physical system is proposed.First,an integrated energy cyber-physical system model was established,a static model of the information system and a mathematical model of the physical system were established using the complex network theory and energy hub technology,and the process of the information system was analyzed and modeled.Secondly,based on the Markov chain Monte Carlo(MCMC),a multi-period state probability model of the cyber-physical subsystem was established.Finally,the proposed reliability evaluation index was adopted to consider the energy supply level of the system at the same time,the influence of information equipment failure in information system on the reliability of the integrated energy system under different fault conditions was analyzed,and the sensitivity of the system reliability to different information equipment was analyzed.An integrated energy cyber-physical system was taken as an example in the calculation.According to the above evaluation indicators and methods,the influence of information equipment failure in information system on the reliability of the integrated energy system was evaluated.The results can provide references for the planning and operation of the integrated energy cyber-physical system.