Intelligent Automatic Generation Control PDF Download

Power systems should be maintained at constant frequency and all the interconnected generators must remain in synchronism. Even though there are changes in the flow of power, voltage magnitudes should remain within assigned ranges at different points of the power grid. The major and most important unit in a power system is the generator. Automatic Generation Control (AGC) is the essential function in controlling the power grid. It consists of controlling the generator's terminal voltage, its output power and frequency. To maintain constant terminal voltage, exciter control is needed To maintain frequency and power within acceptable limits turbine-governor control is needed. An additional feedback controller called the Power System Stabilizer is used to control frequency deviation through the exciter. As the load deviates unpredictably from its normal value, automatic control must detect the changes in the system and initiate a counter control. These actions must eliminate instantly and efficiently the induced state deviations and restore the system to its new steady state operating point. Because of the dynamic nature of the power system, fixed-parameter controllers cannot perform well when the operating points deviate enormously from the design operating point. Since the operating point of a power system changes frequently, the settings of the control parameters will have to be updated to adapt with the new environment introduced by these changes. For this reason intelligent control can improve power system performance. In this thesis, we describe two controlling methods to improve the exciter action in response to voltage deviations. Improved intelligent control schemes were delivered and applied to the Power System Stabilizer to improve its behavior under normal conditions and unpredicted circumstances Our proposed control strategies on the Exciter and Power System Stabilizer do not require large and complex calculations nor very small sampling frequencies.