What should a transmission operator do after a 354 kV line carrying 1250 MW trips, causing voltage violations?

After a significant transmission event, such as the trip of a 354 kV line carrying 1250 MW, the resultant voltage violations must be immediately addressed to ensure the stability of the electrical grid. The correct approach in this scenario involves re-dispatching generation and requesting MVAR (reactive power) support from available generators.

Re-dispatching generation involves adjusting the output of power plants to help balance the system and remedy the voltage issues created by the line trip. When a major element like a 354 kV transmission line trips, the abrupt loss of generation can lead to over or under-voltage conditions. By re-dispatching, the operator can bring more generation online or adjust existing generation levels to help stabilize the voltage.

Requesting MVAR support is also critical in this situation. MVAR support helps to manage voltage levels within the system by either supplying or absorbing reactive power, which is essential for maintaining voltage stability. When there are large swings in real power (like the loss of 1250 MW), reactive power plays a crucial role in helping to restore proper voltage levels.

Focusing on the other options, ignoring the situation would be highly irresponsible as it could lead to further complications in the system. Disconnecting non-essential loads might sound