Reliability and Vulnerability Assessment of Interconnected ICT and Power Networks Using Complex Network Theory

摘要

The increasing reliance of power systems on Information and Communication Technologies (ICTs) places higher requirements on the reliable and secure operation of ICT networks. This paper proposes an approach to measure the effect of failure/misoperation of ICT network components on the reliability of power grid. A new vulnerability index, namely the system security index (SSI), based on Complex Network Theory (CNT), is derived for this purpose. The vulnerability of each ICT network component is quantified based on the influence of its failure/misoperation on the probability of the failure/misoperation of the power system. The proposed approach is demonstrated on a real UK's power station intertrip scheme and compared with the conventional fault-tree analysis.