This paper presents an adaptive frequency response control scheme for the large scale wind farm. This scheme enables wind farm to participate the grid frequency regulation. The main advantage of this scheme is that, during the frequency response, by adaptively adjusting the droop coefficient and control gain according to local wind speeds, this scheme takes into account the wind speed difference among wind generators. Specifically, the droop coefficient of each wind generator is dynamically adjusted inversely proportionally to the local power margin, while the over-frequency control gain is obtained by solving a linear programming problem, which is also formed based on the local wind speed. This way, during the frequency support, the power contribution is allocated among multiple wind generators in an adaptive and reasonable fashion. As a result, not only the wind farm frequency support performance is improved, but also the wind generator stability is ensured. Simulation results on the data collected from a real wind farm validate the effectiveness of the proposed control scheme.
Key words
frequency response /
wind farm /
wind turbines /
wind speed /
power system
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