Design of adaptive H∞ controller for power system based on prescribed performance

The design problem of the adaptive robust prescribed performance controller with external disturbance is studied for the excitation system of single-machine infinite power system in here. By combining the H-infinity theory and adaptive control method, the designed controller not only ensures that the external interference influence on the system is attenuated to a degree of giving, but also the unknown parameter existed in the system can also be estimated. The transient performance of the generator rotor angle can be set in advance with the help of the prescribed performance control (PPC) strategy. Finally, the simulation experiment considers two kinds of faults, namely mechanical fault and short circuit fault, and proves the feasibility and effectiveness via simulation results. (C) 2019 ISA. Published by Elsevier Ltd. All rights reserved.