부산대학교 도서관

To solve the problem of cascading failures in the power grid, combining the actual physical characteristics of the power grid, this paper proposes a new cascade failure model based on vulnerability indicators of electric betweenness. The model adopts the capacity load model and the principle of nearest neighbor allocation, which can overcome the shortcomings of the existing model that assume that the grid power flow only flows along the shortest path between the busbars. The scale of the largest subgraph and the load loss rate are introduced to measure the robustness of the grid considering both connectivity and power supply capabilities. The simulation results in the IEEE118 and IEEE300 bus systems show that the model based on electric betweenness is superior to the model based on betweenness.