A Novel Strong Action Controller Simplified Model with Detailed Mathematical Interpretation and Performance Evaluation

In the early years of the 20th century, proportional-integral-derivative (PID) controller was created as the 1st step in modern control engineering. With time, PID controllers proved their effectiveness in dynamical systems control. Various developments and modifications were accomplished to the PID controller. One of these recent additions is the strong action controller (SAC). SAC is utilized as a power system controller and stabilizer on most generators in the Russian electrical power grid. Its structure is a complex combination of P, I, and D blocks. In the current paper, a novel simplified model will be deduced, and comprehensive analysis will be presented to this SAC. Sufficient mathematical interpretations will be done. Also, SAC performance evaluation in order to examine its suitability to act as an efficient controller will be proved and demonstrated; and to achieve this suitability, a comparison between SAC and PID controller will be carried out. All results proved its effectiveness to work as an active controller.