What is is automatic generation control and What is are the mode of agc?

Automatic Generation Control (AGC) is a system used in power plants to automatically adjust the output of generators to balance supply and demand in real-time, ensuring grid stability and reliability. The primary modes of AGC include frequency control, which maintains the overall system frequency, and load control, which manages the distribution of power among different generators to meet varying load conditions. These modes help prevent frequency deviations and maintain the desired power quality in the electrical grid.