Research on cyber-physical security of power system based on Bayesian attack tree
This paper proposes a security assessment strategy for power system communication network based on the combination of Bayesian attack tree and relay protection,i.e.,at the information level of the power communication network,Bayesian network,security assessment architecture,and joint tree algorithm are integrated,the security probability of the power equipment substation node at the information level is assigned,and the model is used to analyze the faults of the line controlled by the power equipment substation at the physical level.The relay protection mechanism is triggered and the percentage of load to be removed is calculated when power system removes the fault.By combining the probability of security at the information level and the faults at the physical level,a new security assessment index,the load shedding rate,is proposed,and the nodes with poor security are found to complete the security assessment.The analysis of the arithmetic examples verifies the scientificity and effectiveness of the method proposed in this paper,which can be widely applied on a large scale.
NETL
NSTL
万方数据
