Research on the control strategy of the flywheel and lithium battery hybrid energy storage system that assists the wind farm to perform a frequency modulation

Abstract

In order to enhance the power consumption capacity of the power grid and improve the frequency adjustment performance of the wind farm, this article studies the "flywheel+lithium power" hybrid energy storage system operation control strategy, adopts the combination method of sliding average filtering and fuzzy control, and reasonably distributes the power of compensation for storage energy. While improving the frequency adjustment performance of the system, we will take into account the shortage of mixed energy storage recovery time, improve the maintenance rate (SOC) maintenance rate (SOC) maintenance rate, and achieve complementary advantages between the flywheel and the lithium battery. The simulation results show that the scheme can effectively improve the power quality transported by the grid, and keep the hybrid energy storage system well adaptable to the change of compensation power and extend its service life.