SAG (Droop) refers to a phenomenon in electrical systems where the output voltage of a generator decreases as the load increases. This behavior is particularly important in power generation, as it helps maintain system stability. The term "droop" describes the gradual decline in voltage, which allows generators to share load effectively without overloading. In practice, droop control is used in power plants and microgrids to ensure that multiple generators can operate in parallel. By adjusting the output based on load changes, droop helps prevent fluctuations in voltage and frequency, contributing to a more reliable and efficient power supply.