MTD inspired state estimation based on random measurements selection
State estimation (SE) is critical to modern power system control center and is vulnerable to cyber attacks. In this paper, a SE algorithm based on random measurements selection, which is inspired by the concept of moving target defense (MTD) is developed to prevent and mitigate stealthy cyber attacks. With the proposed SE, a library of selected measurements scenarios is first generated offline given the available measurements and network topology. During online operation, multiple weighted least square (WLS) based SEs are processed in parallel with randomly picked scenarios from the library. The final solution is selected based on the largest normalized residuals with regard to individual scenarios. The effectiveness of the proposed SE is examined by attack defense experiments on IEEE 14 bus, 39 bus, 57 bus, and 118 bus systems.
2016 North American Power Symposium (NAPS)