Which of the following would you expect to experience during a Geo-Magnetic disturbance?
A) System frequency declines below an acceptable operating level, and generator governors are required to take action to arrest the frequency decline.
B) Significant low frequency induced currents enter the system through the grounded transformer neutrals, causing system overloads and harmful system wide harmonics.
C) System voltages increase beyond safe operating levels. Requiring the operator to take action to absorb VARs from the system or decrease voltage schedules.
D) Significant high frequency induced currents enter the system through the grounded transformer neutrals, causing system overloads and harmful system wide harmonics.