False Analog Data Injection Attack Towards Topology Errors: Formulation and Feasibility Analysis
For power system operators, this attack reveals a vulnerability where analog data manipulation can lead to incorrect digital topology status, potentially causing biased state estimates.
The paper proposes a false analog data injection attack that mimics topology errors, causing state estimation to converge to a wrong topology. Feasibility is demonstrated on an IEEE 14-bus system.
In this paper, we propose a class of false analog data injection attack that can misguide the system as if topology errors had occurred. By utilizing the measurement redundancy with respect to the state variables, the adversary who knows the system configuration is shown to be capable of computing the corresponding measurement value with the intentionally misguided topology. The attack is designed such that the state as well as residue distribution after state estimation will converge to those in the system with a topology error. It is shown that the attack can be launched even if the attacker is constrained to some specific meters. The attack is detrimental to the system since manipulation of analog data will lead to a forged digital topology status, and the state after the error is identified and modified will be significantly biased with the intended wrong topology. The feasibility of the proposed attack is demonstrated with an IEEE 14-bus system.