Interval state estimation with Limited PMU against False Data Injection Attack

According to the development of smart grid, we propose a multi-dimensional protection mechanism based on PMU (phasor measurement unit) in this paper. In order to narrow down the variation range of state variables against false data injection attack, we propose a new dynamic network protection method, in which the local measurement with PMU used. Meanwhile we propose a detected strategy of interval state estimation, which could effectively identify dynamic network attacks and protect the smart grid. Finally, through numerical simulations on the standard IEEE14-node system, it is verified that the proposed model can alleviate the smearing effect from the perspective of attack, and improve the accuracy of the defense mechanism. In this paper, through the fusion of PMU data, the smart grid can be protected from the two dimensions included attack and defense, which effectively ensures the safe and stable operation of the smart grid.