How does a governor with a droop setting of 0% affect system stability?

A governor with a droop setting of 0% establishes a direct relationship between the generator’s output power and the system frequency, without allowing any reduction in frequency as load increases. This means that the generator does not respond to changes in load by adjusting its output power proportionately to maintain frequency, leading to a fixed output level regardless of system demand.

This condition can contribute to instability in the dynamic response of the power system. When a power system experiences fluctuations in demand or supply, having a governor that does not provide a droop response means that the system could not effectively balance load changes with generation. Instead of smoothly adjusting and stabilizing frequency during disturbances, the system may experience oscillations or larger deviations from the nominal frequency, as there will be a lack of necessary response to maintain equilibrium. Hence, the incorporation of a governor with a 0% droop can exacerbate instability rather than promote it.

This scenario underlines the importance of droop settings in maintaining system stability and supporting dynamic response capabilities. Stability is enhanced when governors are equipped with droop settings that allow for a proportional response to frequency changes, thus facilitating better load sharing and overall system performance.