Hybrid energy storage control system and method for stabilizing wind power generation power fluctuation

Abstract

The invention provides a hybrid energy storage control system and method for stabilizing wind power generation power fluctuation, and belongs to the technical field of wind power generation. A zero-phase-shift low-pass filter is used for detecting grid-connected target power and dynamically distributing power of a super capacitor and an all-vanadium redox flow battery; the low-frequency power, the medium-frequency power and the high-frequency power obtained after decomposition are small in coupling amount and high in resolution ratio, the energy storage device works in the respective charging and discharging frequency range, the charging and discharging power is reduced, and the energy storage device is of great significance in improving the capacity of the energy storage device and prolonging the service life of the energy storage device. Meanwhile, the active power generated by the direct-driven wind power can be smoothly merged into the power grid under the stabilization of the hybrid energy storage system no matter under the maximum power tracking or under the limited power control mode, and the active power control that the direct-driven wind power generator can respond to the power grid dispatching instruction is realized.

Description

[0001] This application is a divisional application of a patent application entitled "Hybrid Energy Storage Control Method and System for Suppressing Wind Power Fluctuations". The application date of the original application is March 09, 2020, and the application number is 202010158879.8. technical field [0002] The invention relates to the technical field of wind power generation, and in particular, to a hybrid energy storage control system and method for smoothing wind power fluctuations. Background technique [0003] Due to the influence of factors such as climate and geographical environment, the output of wind power is random and intermittent. Since the fluctuating power of wind power contains mixed power of high frequency, medium frequency and low frequency, if it is not processed, large-scale wind power is directly integrated into the power grid. It is easy to cause wind power fluctuations, which will affect the power quality, voltage stability and grid dispatching of...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problems in the prior art, the embodiments of the present invention provide a hybrid energy storage control system and method for smoothing wind power fluctuations, so as to solve the problems in the prior art that cannot quickly and accurately decompose power Reduce the capacity of hybrid energy storage, reduce costs, and improve the effect of stabilization

Images