Which stability type assesses the generation's ability against disturbances over time?

The type of stability that assesses a generation system's ability to withstand disturbances over a period of time is transient stability. This concept focuses on the system's response immediately following a disturbance, such as a fault or sudden change in load, and how it returns to a stable operating condition. Transient stability analysis evaluates the system's performance during the transient phase, which typically lasts from a fraction of a second up to several minutes, and examines whether the system can maintain synchronism and recover to a steady state after the disturbance.

This stability type is crucial in understanding how well a power system can react to sudden changes or faults and remain functional, ensuring reliable power delivery. It takes into account the dynamics of generators, loads, and the overall system configuration, making it essential for grid operators to maintain system reliability during challenging conditions.