What should be done if voltages are decaying to the load dump limit?

When voltages are decaying to the load dump limit, shedding load is a crucial response to maintain system stability. Shedding load involves reducing the demand for electricity by disconnecting certain consumers, thereby decreasing the overall load on the system. This helps to alleviate stress on the grid and allows for a more stable voltage level as the balance between supply and demand is adjusted.

In the context of power systems, when voltages drop significantly, there is a risk of cascading failures or larger grid disruptions, as the system may become unstable. By shedding load, operators can prevent further degradation of voltage levels, which is essential for protecting the infrastructure and ensuring reliable service.

Increasing generation, adjusting transformer tap settings, or notifying local operators could be part of a broader strategy to address voltage issues, but shedding load directly tackles the immediate problem of excessive demand that is causing voltage levels to fall. Therefore, it is the most effective immediate action to take in this scenario.