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

Area of Science:

• Power Systems Engineering
• Cybersecurity
• Control Systems

Background:

• Power systems face increasing cyber-attack risks, necessitating robust defense mechanisms.
• Existing attack-defense frameworks require advanced strategies to counter sophisticated threats.
• Understanding voltage dynamics is crucial for both attack and defense in power grids.

Purpose of the Study:

• To propose an innovative voltage-sensitivity-based (VSB) attack scheduling method.
• To develop a compensatory defense mechanism to mitigate attack impacts.
• To validate the proposed attack and defense strategies in realistic power system simulations.

Main Methods:

• Analysis of bus voltage and current relationships to determine bus sensitivity.
• Development of a VSB attack strategy prioritizing high-sensitivity buses.
• Implementation of a digital second-order generalized integrator phase-locked loop (SOGI-PLL) for defense.
• Simulation experiments on IEEE 14-bus and 39-bus systems.

Main Results:

• The VSB attack effectively maximizes disruption by targeting sensitive buses.
• The SOGI-PLL compensatory mechanism successfully mitigates the adverse effects of the VSB attack.
• Validated effectiveness of the attack design and defense strategy on benchmark systems.

Conclusions:

• The proposed VSB attack strategy offers a novel approach for attackers to disrupt power systems.
• The SOGI-PLL based defense provides an effective countermeasure against such voltage-based attacks.
• This research contributes to enhancing the resilience of power systems against cyber threats.