Wind turbine generator based power grid regulation method and device

Abstract

The invention provides a wind turbine generator based power grid regulation method and device. The method includes obtaining operation parameters; obtaining active power reference values, a pitch angle in a load shedding level and a pitch angle required to the adjusted when the power grid achieves a steady state in primary frequency modulation according to the operation parameters; and performing regulation on the power grid according to at least one among the active power reference values, the pitch angle in the load shedding level and the pitch angle required to the adjusted when the power grid achieves the steady state in primary frequency modulation. According to the invention, the power grid is regulated according to at least one among the above parameters, so that the power grid can achieve at least one effect among 1, 2 and 3 in the following: 1, reducing the change rate in the initial stage of system frequency disturbance, quickly adjusting electromagnetic power, controlling the rotation speed of the wind turbine generator so as to release or store rotation kinetic energy and accelerating frequency responding speed; 2, providing active power standby for responding frequency drop; 3, sharing unbalanced power of a system and performing primary frequency modulation.

Description

technical field [0001] The invention relates to the technical field of smart grids, in particular to a method and device for controlling a grid based on a wind turbine. Background technique [0002] The centralized connection of large-scale wind turbines to the power grid will lead to reduced system inertia and insufficient frequency regulation capability. To solve this problem, a frequency regulation control strategy for variable-speed wind turbines is proposed. [0003] In order to improve the ability of the grid to accept wind power, on the one hand, it is necessary to improve the regulation and control capability of the grid, and on the other hand, it is also necessary to improve the regulation capability of wind power itself and participate in the frequency adjustment of the grid. At present, in order to improve the utilization coefficient of wind energy, grid-connected wind turbines generally adopt maximum power output tracking control, which cannot participate in the ...

AI Technical Summary

Problems solved by technology

At present, in order to improve the utilization coefficient of wind energy, the grid-connected wind turbines generally adopt maximum power output tracking control, which cannot participate in the regulation of grid frequency.

Therefore, after large-scale wind turbines are connected to the grid, the system inertia will inevitably decrease and the frequency regulation capability will be insufficient.

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