Search

False data injection (FDI) attack is one of the attacks that can seriously affect the operation of power systems. Some studies have focused on the cyber-attack methods of AC-DC hybrid systems. However, few studies pay their efforts on the optimization of FDI attack on AC-DC hybrid systems. Therefore, an FDI attack strategy optimization method for AC-DC hybrid systems is proposed in the paper. Firstly, a two-layer optimization model with the objective of maximizing the loss of FDI attacks is established. In the upper model, the attacker launches FDI attack on the measuring system to find the optimal attack strategy to maximize the economic loss of the power system. The lower layer model calculates the maximum economic loss under a FDI attack with the objective of minimizing the generator output adjustment and load shedding, considering the security constraint of AD-DC hybrid system and the risk of commutate failure of DC converter station. Then, the two-layer optimization model is solved by the genetic algorithm to generate the optimal attack strategy. Finally, the improved IEEE 14-bus system is taken as an example to verify the effectiveness of the model. Simulation results show that the attack strategy optimized by the proposed method can effectively improve the cost of security constrained economic dispatch (SCED).

In order to realize the energy transformation under the goal of carbon neutrality， new energy represented by wind power and photovoltaic power will serve as the main power supply for the future power system. However， the access of high-proportion renewable energy brings about high uncertainty and undermines system inertia， so much so that the scheduling resources of the traditional power system can no longer meet the scheduling demand of the future power system. Hence， a transformation from “the source changes with load” to “the interaction between source and load”. Therefore， this paper summarizes the load resource scheduling methods geared for power system scheduling. Firstly， from the perspective of power grid operation scheduling， the necessity of bringing controllable load into power grid operation scheduling is expounded， and controllable load is classified from five aspects： dispatching response time， dispatching response mode， users’ power consumption characteristics， energy transfer direction and load aggregator platform. Then， the influence of controllable load access on power system scheduling is analyzed from the aspects of modeling technology， scheduling form and scheduling architecture. Finally， combined with the current development of power system in China， the suggestion and prospect of controllable load resources participating in power grid operation scheduling are put forward.

False data injection attack is one of the important factors that threaten the safe and stable operation of power systems. The research on the methods of the attack against power systems can provide decision-making basis for the improvement of power system defense measures. Considering the operation characteristics of high voltage direct current (HVDC) converter station and AC-DC coupling characteristics, a false data injection attack method for AC-DC hybrid system is proposed. Firstly, the basic principle of state estimation of AC-DC hybrid systems is analyzed. Secondly, the attack strategy in AC-DC hybrid systems is proposed, and the attack model is constructed. Finally, the improved IEEE 30-bus system is taken as an example for simulation verification. The results show that the false data injection attack against AC-DC hybrid system can bypass the bad data detection algorithm and endanger the safe and stable operation of the system, which verifies the effectiveness of the proposed model and method.