Abstract
With a large number of DFIG wind turbines connected to the power grid, in order to improve the frequency fluctuation caused by its decoupling, this paper first analyses the current situation of DFIG wind turbines participating in the primary frequency modulation of power grid, and establishes the corresponding model based on the above analysis. According to the commonly used inertial control methods, a frequency modulation method for auxiliary power grid of DFIG wind turbines based on improved frequency control strategy is proposed. Through the simulation of actual power grid model, the grid frequency fluctuation has been effectively alleviated after adding frequency control link to DFIG wind turbines, and it is concluded that the higher the wind power penetration, the more significant the frequency improvement effect.
Published Version
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