In order to improve the invulnerability of electric power optical transmission network in the smart grid, experimental simulations of random attacks and selective attacks on electric power optical transmission network in Jiangbei District of Nanjing City are carried out based on complex network theory. A method of improving the invulnerability of the network is proposed according to the simulation results. In the experiment of random attacks, we investigate the impact of single node failure on network connectivity and screen the hub nodes, and get the hub nodes that need to be protected. In selective attacks, two kinds of attack strategies are proposed, namely, network efciency relative loss rate frst attacks and real-time betweenness frst attacks. The invulnerability of the network is evaluated from three aspects including connectivity, network efciency, and network efciency relative loss rate. The experimental results show that the electric power optical transmission network has the worst invulnerability to real-time betweenness frst attacks. On this basis, an important node evaluation and protection method is proposed to improve the invulnerability of electric power optical transmission network, and the feasibility and effectiveness of the proposed method is verifed by the example simulation.
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