In which situation would islanding conditions be important to identify during restoration?

Islanding conditions are critical to identify during restoration specifically when isolating parts of the grid for safety. In situations where certain sections of the grid must be deliberately disconnected, understanding islanding is crucial to ensure that these isolated parts can maintain stability and operational integrity. If the islanded portion of the grid is not properly managed, it can lead to imbalances in generation and load, causing potential outages or damage to equipment.

During restoration phases after an outage or disturbance, ensuring that sections of the grid remain stable while other sections are restored is essential. This involves evaluating whether the isolated areas can remain self-sufficient, which can help prevent cascading failures or creating unsafe operating conditions.

While the other options relate to important considerations in power system operations, they do not emphasize the critical nature of identifying islanding conditions during restoration as directly as the isolation of grid parts for safety does.