AC-DC hybrid system-oriented false data injection attack strategy evaluation method

Abstract

The invention discloses an AC-DC hybrid system-oriented false data injection attack strategy evaluation method, which considers the influence of a high-voltage DC transmission line on an AC system, and comprises the following steps of: firstly, establishing an AC-DC hybrid system state estimation model, and estimating a state quantity by using the estimation model; then establishing a false data injection attack strategy evaluation model oriented to the AC / DC hybrid system, setting constraint conditions, and then solving the attack strategy evaluation model by using a genetic algorithm; and finally, detecting weak nodes of the AC-DC hybrid system through an evaluation result. The attack strategy obtained through evaluation can bypass a bad data detection mechanism, the scheduling cost is increased, the weak nodes of the alternating current and direct current hybrid system can be detected from the attack perspective, a user can optimize the system in a targeted mode, and active defense is carried out on attacks.

Description

technical field [0001] The invention belongs to the field of power system network security, and relates to a false data injection attack strategy evaluation method for an AC / DC hybrid system. Background technique [0002] Network attack is one of the important factors that threaten the safe and stable operation of the power system. Studying the attacker's network attack methods against the power system and the consequences can provide a decision-making basis for the improvement of power system defense measures. False data injection attack is a network attack method that is easier to implement and more harmful. It uses the loopholes in the state estimation bad data detection mechanism to maliciously tamper with the measurement data. The optimization of the attack strategy can mislead the decision-making of the system operator and affect the economy and security of the power system operation. [0003] In the current research on false data injection attack strategies, domestic...

AI Technical Summary

Problems solved by technology

However, most of these studies are based on linear state estimation, and the research scenarios are AC systems. When constructing attack strategies, the influence of DC transmission lines cannot be considered.

Due to the risk of commutation failure when the DC system is attacked, it not only affects the power flow stability of the AC system, but also increases the cost of economic operation

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