Abstract
Considering the growing wind power penetration in power systems, using the flexible control ability of these turbines to enhance power system dynamic behaviour has been investigated. One of the major challenges regarding the stability problem of power systems is the low-frequency oscillations (LFOs) of synchronous generators in a power system. Usually, power system stability units are used to damp these oscillations, but using wind turbine systems for this purpose has been suggested in recent studies. In this regard, mostly a linear supplementary control loop has been employed in the control system of wind turbines. Applying a linear structure for the supplementary control loop does not result in optimum performance since the power system operating conditions and the wind turbine power generation change continuously. In this study, adaptive control is used to design the supplementary loop. Doubly-fed induction generator (DFIG)-based wind turbine systems are used for this study. Since adaptive control parameters tend to optimum values, applying this controller will provide better damping for power system (LFOs at different wind speeds, as shown in this study.
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