Reliability and Dependability Analysis for Agent-Based Reliability Enhancement Technology (ARET) System

As a general rule for evaluating dependability of a system, reliability and dependability is commonly considered which barely pays attention to the stability of system components. This means that estimation does not deal with mis-operation caused by environment and operation in SAS (substation automation system). In this paper an integrated reliability and dependability analysis is proposed to analyze SAS (substation automation system). With absorbing continuous time Markov process, the analysis can be well applied to estimate and quantify system robustness. In this research, the analysis applied to the actually implemented, dual system and newly proposed IEC61850-based backup system, named ARET (agent-based reliability enhancement technology) system. Comparative analysis has shown that: By introducing the standard of IEC61850 into the system, not only the system dependability was promoted, but also the system reliability was enhanced greatly.