An electrical betweenness approach for vulnerability assessment of power grids considering the capacity of generators and load

► We define the electrical betweenness by considering the maximal demand of load and the capacity of generators. ► We introduce the loss of load to measure the vulnerability of power grids. ► The cumulative distributions of node electrical betweenness follow a power-law. ► The nodes with high electrical betweenness play critical roles in power grids.