Control system modeling in early-stage simulation for cyber vulnerability assessment

Previous approaches for early-stage shipboard-power-system simulation were driven by a need to perform time-domain simulation during the early design stage and included an internal idealized representation of the control system. Herein, the reduced-order physical model of the power system is combined with an independent representation of the control system. This allows the benefits of faster simulation and reduced modeling effort to be retained while improving understanding of the effects of the control system on system performance. This approach is demonstrated by studying a compromised control system subjected to false set point attacks that drive the system operation away from ideal behavior. Using a notional MVDC system and a representative operational vignette, the performance of the uncompromised system is compared with the performance of the compromised system over a set of potential cyber disruptions by calculating the system dependability.