If three transmission lines connect the generation area to the load area and Line 1 trips, can Line 2 violate its operating security limit when 1000 MW is flowing?

The situation presented involves an analysis of the operating limits of transmission lines within an electrical grid. When Line 1 trips, the load that was being served by that line would need to be redistributed among the remaining lines connected to the load area—namely Line 2 and Line 3.

In this scenario, if Line 2 is currently carrying 1000 MW when Line 1 trips, it may be necessary for Line 2 to increase its load to accommodate the generation capacity needed by the load area, depending on the specific configuration and capacities of the lines involved. However, if Line 2 has a maximum capacity of 600 MW, it cannot exceed this limit without risking damage or operational issues.

The correct answer to the question stems from understanding that although lines can operate close to their limits, exceeding said limits could lead to violations of security protocols and potential failures. In this case, if Line 2 has a defined maximum capacity of 600 MW, it is not capable of carrying additional load should Line 1 go offline without breaching its operational security limits. Therefore, the operational protocol expects that Line 2 should remain below its maximum capability.

Thus, the correct interpretation leads us to understand that while operational adjustments can be made following a disturbance