What type of units will provide the largest adjustments in MW output during frequency disturbances?

Units with large capacities and small droop settings are particularly effective in providing significant adjustments in megawatt (MW) output during frequency disturbances for several reasons.

Firstly, large-capacity units have the inherent ability to produce or absorb a substantial amount of power. When frequency disturbances occur, these units can offer a more considerable amount of frequency regulation services. Their size means they can have a more significant impact on grid stability by injecting or withdrawing large quantities of MW as needed to help correct frequency deviations.

Secondly, the droop setting of a unit refers to its responsiveness to changes in frequency. Units with small droop settings mean that they have a higher sensitivity to frequency changes; they respond more quickly and significantly to deviations from the nominal frequency. Therefore, a unit with a small droop will begin to adjust its output more aggressively as the frequency drops or rises, making it more effective in stabilizing the grid during these events.

In contrast, units with high droop settings will respond less aggressively to frequency changes, which limits their ability to provide rapid adjustments. Units with no droop settings can adjust output based strictly on command and may not contribute effectively during disturbances where autonomous response to frequency is required.

Thus, the combination of large capacity and a small droop