Frequency Vulnerability Analysis of Power Systems Considering UAV Striking

Abstract

A novel Unmanned Aerial Vehicle (UAV) striking method on system frequency of power systems is discussed in this paper. Typical characteristics of UAV attack on power grids are analyzed and summarized in five aspects: difficult to be detected, hard to be foiled, nonsensitive, clustered and precise. To illustrate the feasibility of UAV attack, UAV short-circuit attack mode is proposed as an effective way to attack against the grid. We analyze the feasibility of UAV short-circuit attack mode by establishing a mathematical model, and verify the feasibility based on various short-circuit materials. UAV frequency attack strategies are discussed to show the severe damage inflicted by UAV attack. Among them, Multipoint Multistage Attack (MMA) strategy can result in rapid collapse of the frequency by implementing a series of attacks precisely. Compared to Multipoint Simultaneous Attack (MSA) strategy, the MMA strategy can utilize both the characteristics of UAVs and vulnerability of system frequency. The proposed strategies are evaluated by a dynamic frequency simulation model. Simulation results show the effectiveness and advantages of the UAV frequency attack strategy.