A risk assessment method for cascading failure caused by electric cyber-physical system (ECPS)

This paper presents a new risk assessment method for cascading failure caused by electric cyber-physical system (ECPS). The development of a trustworthy smart grid requires a deeper and more specific analysis of potential impacts resulting from failures of ECPS. A probability model is presented to calculate the reliability of ECPS which controls the security and stability control system. Cascading failure due to failures of ECPS is being investigated by risk assessment method in this paper. Two scenes including signal lost and signal transmission error which may lead to cascading failure in power system is considered. IEEE 118-bus system is used as a test system and the simulation results verifies the effectiveness of proposed failure model and risk assessment method.