Abstract
With the growing number of electric vehicles, the integration of large-scale disorderly charging loads into the power grid will have some adverse impacts on the safe and stable operation of the grid. As the connection point between the Internet and the power grid, charging facilities face the threat of cyberattacks, which further threatens the stability of the power grid. To illustrate the potential impact of cyberattacks to power grid security, this paper proposes two attack scenarios and corresponding attack strategies based on the charging law of electric vehicles. Firstly, a spatial-temporal forecast model of charging loads is established based on the comprehensive analysis of the behaviors of the three types of electric vehicles. Then according to different types of electric vehicle charging laws, corresponding attack scenarios and attack strategies are designed for maximum attack benefits. And then the charging load redistribution model is given. Finally, simulation results show that cyberattacks against charging plies could cause more serious voltage deviation and transmission congestion in the distribution network, making the grid tend to be unstable. The method proposed in this paper can effectively evaluate the impact of cyberattacks against charging piles on the distribution network.
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