Voltage-Sensitivity-Based Attack Design and Defense Strategy for Power Systems: Attack, Detection, and Compensation

This article explores the problems of the attack-defense framework of power systems; first, an innovative voltage-sensitivity-based (VSB) attack scheduling method is proposed from the perspective of the attacker, with the aim of maximizing disruption to the target bus in the power system. To counteract the introduced VSB attack strategy, a digital second-order generalized integrator phase-locked loop (SOGI-PLL) compensatory mechanism is established to mitigate the adverse effects of the disruption. In the initial phase, the relationships between bus voltages and currents are analyzed, forming the basis for calculating the sensitivity of the target bus to each bus. Building upon this analysis, a novel VSB attack strategy is introduced, allocating higher attack energy to more sensitive buses with the purpose of maximizing the attack disruption of the target bus. Subsequently, a detection-compensation defense framework is established to find and make up for the malicious attack. Specifically, a SOGI-PLL compensation method is introduced to mitigate the negative effect of the attack. Finally, the effectiveness of the attack design method and defense strategy is validated through simulation experiments conducted on the IEEE 14-bus and 39-bus systems.