Optimization and control of cyber–physical power systems under dual-network interactive cascading failure

Due to deep integration between power grids and communication networks, cascading failure is spreading more readily in cyber–physical power systems (CPPS), even leading to blackouts. This paper mainly investigates optimized control under dual-network interactive cascading failure to support the operation of CPPS. Firstly, the topological and interactions characteristics between power grids and communication networks are analyzed, and a CPPS model is established based on the concepts of complex networks where the correlation of nodes is described by ”degree to degree”. Secondly, considering communication constraints including simultaneous bandwidth consumption and delay, an optimal routing policy with constraints based on publish–subscribe network (PSN) architecture is employed to reconstruct the transmission paths of corrupted data packets during cascading failure. Furthermore, a round trip time is defined to determine the received states of data packets and to reflect the impact of packets delay on cascading failure. Thirdly, according to direct current (DC) power flow and optimal routing policy with constraints, an optimization and control algorithm under the interactive cascading failure is proposed to provide optimized control strategy of CPPS. Finally, simulation results demonstrate the effectiveness of the proposed method in comparison with other approaches.