Analysis of Power System Vulnerability Considering Multiple Disturbances Corresponding to Information and Physics

Abstract

With the continuous development of smart grid, the automation degree of power system continues to improve. The number of measurement-calculating and decision-controlling units of the power grid has greatly increased, and the scale of the power information network has become larger and larger. The stable operation of the power system is inseparable from the real-time dispatch of its information system. As the key infrastructure, power system has a huge impact on national security, economic development and social stability, and has become one of the key targets of terrorist destruction. In view of the fact that information network and power network integrate with each other currently, this paper focus on the functions of the power control center, modeling information systems together with physical systems. Considering that the power system has suffered multiple disturbances corresponding to information and physics, the quantitative analysis method is used to simulate the dynamic evolution process after the accident, and the loss of load is used as the evaluation index to analyze the vulnerability of the power system, to find the vulnerable components of the power grid. So effective protection measures can be taken to reduce the loss of the power system after this type of destruction. The constructed model is solved by mixed integer nonlinear programming method. IEEE Reliability Test System-24 verifies the feasibility and effectiveness of this model.