Teshmont’s studies team has been busy performing studies to calculate geomagnetic induced current (GIC) flow and associated impact on reactive power increment of a power system. These studies are a requirement for compliance with the NERC Standard TPL-007-1.
Various geoelectric field scenarios have been explored by taking into account the key geophysical factors associated with the geomagnetic induction process. Geoelectric field scenarios can then be mapped into the system, which includes elements such as major power transformers and transmission lines. Teshmont has simulated the impact of half cycle saturation in transformers as well as the GIC levels in transmission lines. Consequently, Teshmont has analyzed system voltage stability at normal system conditions (P0) and single equipment outages (P1).
If required, mitigation approaches have been recommended and applied to address vulnerable and critical power transformers and system voltage instability under geomagnetic disturbance (GMD) events.