科研之友
微信
新浪微博
Facebook
分享链接
摘要
The integration of an information network brings new risks to the safe operation of the power grid, so study of the generation and propagation mechanism of CPPS cascading failure is a matter of importance. First, a CPPS partial interdependence model is established, grid risk elements are constructed based on ageing factors, load flow, hidden failure and chance factors. Then information network risk elements are constructed based on information occupancy, topology, network attacks, node loads and dependencies, and risk element theory is applied to the CPPS cascading failure prediction process. Second, a risk calculation method considering the load loss rate of the two networks is proposed to identify the key nodes of the backbone layer and the access layer. Different effects of information node failure by information nodes and network attacks are analyzed. The analysis shows that the dependency relationship will promote the propagation of faults in two networks and increase the risks; the risk calculation method can comprehensively assess cascading failure risk and identify key information nodes; when a network attack is combined with the node's own failure, the average risk of CPPS is the highest, measures should be taken to improve the reliability of CPPS. ? 2023 Power System Protection and Control Press.
- 单位
