With the large-scale grid connection of wind farms,the equivalent inertia and frequency regulation capacity of the grid decreases,and wind farms have difficulty in providing the required power support for the grid in case of fail-ure,and there is an urgent need to improve the wind farm power regulation capacity.In response to the current problem of slow power regulation of wind farms and the inability to adjust output power flexibly,we propose a rapid active power control method for doubly-fed wind turbines based on the storage and release of rotational inertia and an optimal alloca-tion scheme for wind farm power regulation commands.With the fast response of the converter,the wind turbine elec-tromagnetic torque is dynamically adjusted according to the rotational speed to control the wind turbine to store or re-lease the rotational inertia and quickly change the wind turbine output power.In the allocation of power regulation com-mands,the wind speed volatility and the wind turbine inertia storage and release characteristics are considered,and the wind farm power regulation and command deviation is minimized as the goal to optimize the allocation of power com-mands and reduce the negative impact of wind speed fluctuation on fast power regulation.We establish the simulation model of the wind farm in Matlab-Simulink for verification and the results show that the proposed strategy can achieve a power response within 30 ms,effectively suppress the influence of wind speed fluctuations on the fast power regulation of wind farms,and improve the ability of wind farm frequency regulation.
关键词
风电场/惯量控制/快速功率调节/超速控制/优化分配
Key words
wind farm/inertia control/rapid power control/over-speed control/optimize allocation
维普
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