Risk assessment for the cascading failure of electric cyber‐physical system considering multiple information factors

A risk assessment approach for the cascading failure of electric cyber‐physical system (ECPS) considering multiple information factors is proposed. First, considering hardware, software and personnel factors existing in the information system, the reliability model of the control function of the information system is established. Second, the reliability model of the physical component considering the control function of the information system is established. Finally, the risk assessment approach for the cascading failure of ECPS is introduced, and the probability of the cascading failure and the expected energy not supplied are used as the risk indices. Test results on an improved RTS‐79 system show the effectiveness and significance of the method for choosing the optimal power communication network topology and the measures to reduce the risk.