Design of Integrated Excitation Controller Based on Iterative Learning Control and Active Disturbance Rejection Control
Guest Editor Yuantao Teng (Jilin Normal University, Shiping City, China)
Improving the stability of power systems and regulating the terminal voltage of generators are the two most important excitation control tasks. Improving the anti-interference ability of a power angle is an effective way to meet the adjustment of terminal voltage. The double closed-loop excitation controller was designed based on iterative learning control (ILC) and active disturbance rejection control (ADRC) to study multivariable output feedback control theory. The controller retained the ILC of the terminal voltage and added an inner-loop ADRC of a power angle. The ILC algorithm was adopted in the initial state and input of the outer-loop control of terminal voltage, which allowed certain initial repositioning errors to relax the requirement for the initial state. ADRC method was applied in the inner-loop control of a power angle to quickly eliminate the influence of disturbances on the system output variables. The designed controller was simulated and verified by an experiment for a threemachine power system. Simulation and experimental results confirm that the excitation controller can adapt to variations of the system network parameters, has strong robustness against internal and external disturbances, and can improve the dynamic stability of the system. The excitation controller also guarantees the adjustment precision of the terminal voltage.
Journal: International Journal of Simulation: Systems, Science & Technology, IJSSST V17
Published: Jan 7, 2016