Abstract:

ITbased electric power automation system is a typical realtime system.Although it has brought great convenience to the production and management of the power system,its risks also affect the safety of the power system.Researching the potential vulnerability of realtime systems on open network environments has important practical significance to ensure the security and stability of the power system. On the one hand,this paper abstracts the interaction among logical nodes in the substation automation system based on IEC61850 into a complex network and calculates the network characteristics.The results show that the interaction among logical nodes has small world characteristics.On the other hand,this paper analyzes faults' propagation caused by vulnerability in the substation automation system based on CML (coupled map lattices) cascading fault model,which should provide a reference value to the design of the substation automation system.

Key words: coupled map lattices;substation automation;complex network;vulnerability