Frequency modulation method, device and equipment of wind power and energy storage combined system and storage medium

Abstract

The invention discloses a frequency modulation method, device and equipment for a wind power and energy storage combined system and a storage medium, and the method comprises the steps: obtaining the wind speed data of a wind power plant and the rotor speed data of a wind turbine generator set when the frequency of a power grid is reduced, so as to determine a frequency modulation control mode of the wind turbine generator set at a corresponding wind speed; if the wind speed data is medium-low wind speed data and the rotor rotating speed data is smaller than a preset rotating speed lower limit value, controlling an energy storage group to perform frequency modulation on a grid connected to the energy storage group, and assisting the wind turbine generator to restore the rotor rotating speed; and finally, if the frequency of the grid is recovered to the preset frequency modulation dead zone and the rotor speed of the wind turbine generator is recovered to the preset optimal speed, charging the energy storage group until the SOC of the energy storage group is recovered to a preset normal value, and judging that frequency modulation is completed. The energy storage technology is used for compensating the grid-connected power grid, the stable frequency of the grid-connected power grid is ensured, meanwhile, the electric energy of the energy storage group is used for recovering the rotor rotating speed of the wind turbine generator so as to recover normal operation of the wind turbine generator, and the grid-connected stability of the combined system is improved.

Description

technical field [0001] The present application relates to the technical field of energy storage configuration, and in particular, to a frequency modulation method, device, equipment and storage medium for a combined wind power energy storage system. Background technique [0002] The wind power energy storage combined system is a grid-connected operation combined system that connects the wind turbines and the energy storage equipment to the infinite power grid system through the parallel bus. Based on the needs of intensive management, installing large-scale energy storage equipment at the grid-connected busbar of a wind farm composed of multiple offshore wind turbines can not only effectively utilize the power complementary characteristics of different wind turbines, but also greatly reduce the energy storage equipment and its cost. The number and capacity of supporting converters improve the utilization rate and economy, thereby enhancing the operation stability of the powe...

AI Technical Summary

Problems solved by technology

[0004] This application provides a frequency regulation method, device, equipment and storage medium for a combined wind power storage system to solve the technical problem of unstable power generation caused by frequency disturbance when the current combined system is connected to the grid

Images