Complex Network Based Virtual Power Plant CPS Reliability Analysis

Abstract

In view of the problem that the scale of cascading failures may expand due to the failure of key nodes in cyber network of virtual power plant (VPP) cyber-physical system (CPS), this paper establishes a VPP CPS architecture network model. Small world network and scale-free network are used to simulate the cyber network as well as power network in CPS respectively. In view of the fact that VPP CPS can't resist deliberate attacks well, a protection strategy for key nodes of VPP cyber network is proposed to enhance the protection of key nodes and reduce the impact of cascading failures. The number of surviving nodes and clusters are adopted as indicators to evaluate the reliability of VPP-CPS network. Through the analysis of the complex network characteristic parameters and cascading failure process in VPP CPS network, protecting key nodes can improve the reliability of VPP network effectively.