New system uses wind turbines to defend the national grid from power cuts

EurekAlert  June 19, 2020
Frequency control to raise frequency nadir and eliminate frequency second dip is highly desirable for power grids with high penetration of wind energy. In order to achieve similar frequency support performance and ensure stability of wind turbine systems (WTSs) under varying wind speeds, different levels of wind power penetration and system conditions, researchers in the UK propose a fast frequency support scheme, an adaptive gain which is a function of real-time rotor speed and wind power penetration level. Rotor speeds of WTSs are proposed not to be recovered to the optimal operating points during the primary frequency control but recovered during the secondary frequency control. Simulation results are presented to verify the effectiveness of the proposed more. Open Access TECHNICAL ARTICLE

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