This study provides a detailed review of the NY State power grid to assess the vulnerability of the grid to probable and extreme geomagnetic storm events and similar electromagnetic disturbances triggered by a high-altitude nuclear burst generating a geographically widespread disturbance in the geomagnetic field (i.e. Late-time EMP or E3 environment). This study undertook the development of detailed system models of the backbone of the US transmission grid and more detailed representations of the NY State transmission grid. This model was used to simulate both the geomagnetic storms and E3 environments to provide an assessment of the stress that probable and extreme disturbance events may pose to the reliable operation of the US power grid. The simulations provided GIC (Geomagnetically Induced Current) flow across the network and the manifestation of impacts, such as sudden and dramatic increases in reactive power demands and implications on voltage regulation and reliability in the network. From this analysis effort, meaningful quantification can be provided on the potential levels of operational stress and grid-wide reliability impacts that can be posed by these disturbance environments. The evaluation of GIC flows also allows for the raw determination of transformers, or other electric power grid equipment, that may be considered "At-Risk" of permanent damage or failure due to these disturbances. Widespread catastrophic damage may be an important concern regarding the ability to facilitate rapid recovery and restoration of the electric power grid.
GIC, Geomagnetically induced current, HEMP, High-altitude Electromagnetic Pulse Geomagnetic storm, E3-EMP