Adaptive Damping Control Strategy for Flexible Power Transformers

Aiming at the problem that the fixed additional damping control of flexible power transformer cannot adapt to the changes of system structure and parameters and the possible new oscillation, an adaptive damping control strategy of flexible power transformer is proposed. This strategy can adjust the additional damping provided by the flexible power transformer to the power system according to the change of the oscillation amplitude, and has certain flexibility while rapidly attenuating the oscillation, which can further improve the stability of the power system. A model with flexible power transformer is built on PSCAD for simulation analysis, and the feasibility, effectiveness and advantages of the proposed control strategy are verified.