Automatic generation control of a renewable energy integrated power system in the presence of fractional order 3DOF controller

The prime aim of this paper is to address automatic generation control of a bulky, and intricate power system containing boiler dynamics, generation rate constraints, and governor dead band non-linearities. Along this, the instability caused by inertia less photovoltaic (PV) source is brought into the discourse. To bring the deviations of frequency, and tie-line power inside a particular limit, a reliable, proficient, and expert controller is essential. To have this, higher degrees-of-freedom (DOF) structure is conglomerated with proportional-integral-derivative (PID) controller coordinated by fractional-order (FO) operator to develop 2/3DOF-FOPID controller. Further, these controllers are upgraded to 2/3 DOF-FOPIDN controller by adjoining derivative filter (N). The PID, 2DOF-FOPIDN, and 3DOF-FOPIDN controllers are designed by SOS algorithm. The performance shows that the higher DOF based controllers outweigh the 1DOF-PID controller, and simultaneously, the 3DOF-FOPIDN controller works fabulously over 2DOF-FOPIDN controller. Close by this assessments, the potential, and reliability of 3DOF-FOPIDN controller has been inspected by injecting variable load/PV generation.