CHEN Yangrong,LI Jun'e,XU Ang,et al.Reliability Evaluation Method for Smart Substation Based on Cyber-Physical Fusion[J].Automation of Electric Power Systems,2021,45(3):102-110.
CHEN Yangrong,LI Jun'e,XU Ang,et al.Reliability Evaluation Method for Smart Substation Based on Cyber-Physical Fusion[J].Automation of Electric Power Systems,2021,45(3):102-110. DOI: 10.7500/AEPS20200316001.
Reliability Evaluation Method for Smart Substation Based on Cyber-Physical Fusion
Smart substation has the characteristics of cyber-physical system (CPS). Thus its reliability evaluation should be conducted from the overall perspective of CPS. Firstly
reliability factors on the physical side and cyber side of smart substation
and the interaction between them are analyzed. The reliability index of the cyber equipment considering the equipment importance and the reliability index of communication links considering the reliability of the data transmission are proposed. Meanwhile
the analytic hierarchy process (AHP) model of the importance degree of cyber equipment is presented. Then
it is pointed out that the reliability evaluation of smart substation should consider the effect of power grid disturbance and complicated operation states on the correctness of measurement information. Moreover
the problem that the effect of the cyber side and cyber-physical interactions on the reliability of smart substations can be converted into the problem for analyzing the effect of measurement and control messages on circuit breaker (CB) operation. Finally
the equivalent reliability calculation methods of CB considering the effect of the cyber side and cyber-physical interactions are put forward. Based on this
the reliability evaluation method of smart substation based on Bayes network method is given
and the rationality of the proposed method is verified through the case study.
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