The 2003 blackout in North America highlighted the challenges of energy transmission and distribution. This study examines the power grid from a network perspective, analyzing its ability to transfer power between generators and consumers when certain nodes are disrupted. The power grid is generally robust to most perturbations, but disturbances affecting key transmission substations significantly reduce its functionality. The global properties of the network greatly influence local behavior. The North American power grid is a complex network of over 1 million kilometers of high-voltage lines. It has evolved into the largest and most complex technological system. The grid's structure is analyzed using a network model based on data from the POWERmap system, which includes 14,099 nodes (substations) and 19,657 edges (transmission lines). The network is classified into three types of substations: generators, transmission, and distribution. The study finds that the power grid's network representation contains a single connected component, meaning there is a path of transmission lines between any power plant and any distribution substation. The degree distribution of the network follows a power-law, indicating a scale-free network. However, the cumulative degree distribution shows that the probability of high-degree nodes is less than in a scale-free network but higher than in a random network. The study also examines the betweenness (or load) of nodes, which measures the number of shortest paths passing through a node. High-load nodes play a crucial role in power transmission. The power grid is vulnerable to attacks targeting high-degree hubs, as these nodes are critical for maintaining connectivity. The study finds that the power grid has a high level of redundancy, but it is vulnerable to the failure of key transmission nodes. The removal of a single transmission node causes a slight connectivity loss, and the removal of high-degree or high-load transmission hubs leads to significant connectivity loss. The study also examines the effects of cascading failures, where the failure of one node leads to the failure of others. The study concludes that the power grid's transmission hubs are both essential for connectivity and its largest liability in case of power breakdowns. The vulnerability of the electric power grid is inherent to its organization and cannot be easily addressed without significant investment. Possible solutions include increasing redundancy and capacity or decreasing reliance on transmission by incorporating more generation at the distribution substation level.The 2003 blackout in North America highlighted the challenges of energy transmission and distribution. This study examines the power grid from a network perspective, analyzing its ability to transfer power between generators and consumers when certain nodes are disrupted. The power grid is generally robust to most perturbations, but disturbances affecting key transmission substations significantly reduce its functionality. The global properties of the network greatly influence local behavior. The North American power grid is a complex network of over 1 million kilometers of high-voltage lines. It has evolved into the largest and most complex technological system. The grid's structure is analyzed using a network model based on data from the POWERmap system, which includes 14,099 nodes (substations) and 19,657 edges (transmission lines). The network is classified into three types of substations: generators, transmission, and distribution. The study finds that the power grid's network representation contains a single connected component, meaning there is a path of transmission lines between any power plant and any distribution substation. The degree distribution of the network follows a power-law, indicating a scale-free network. However, the cumulative degree distribution shows that the probability of high-degree nodes is less than in a scale-free network but higher than in a random network. The study also examines the betweenness (or load) of nodes, which measures the number of shortest paths passing through a node. High-load nodes play a crucial role in power transmission. The power grid is vulnerable to attacks targeting high-degree hubs, as these nodes are critical for maintaining connectivity. The study finds that the power grid has a high level of redundancy, but it is vulnerable to the failure of key transmission nodes. The removal of a single transmission node causes a slight connectivity loss, and the removal of high-degree or high-load transmission hubs leads to significant connectivity loss. The study also examines the effects of cascading failures, where the failure of one node leads to the failure of others. The study concludes that the power grid's transmission hubs are both essential for connectivity and its largest liability in case of power breakdowns. The vulnerability of the electric power grid is inherent to its organization and cannot be easily addressed without significant investment. Possible solutions include increasing redundancy and capacity or decreasing reliance on transmission by incorporating more generation at the distribution substation level.