Land wind power full direct current system low voltage ride through method based on battery energy storage

The invention provides a land wind power full-direct-current system low-voltage ride-through method based on battery energy storage. The method comprises the steps that a battery energy storage system is configured in a direct-current link of a land wind power full-direct-current system, the energy storage capacity of the battery energy storage system is selected, and a control strategy of the battery energy storage system is defined. According to the land wind power full-direct-current system low-voltage ride-through method based on battery energy storage provided by the invention, the strategy of low-voltage ride-through can be realized by solving surplus power of a direct-current link, the problem of low-voltage ride-through of a land wind power full-direct-current power generation system is solved under the condition that the requirement of wind power configuration energy storage is met, and the land wind power full-direct-current system low-voltage ride-through is realized. And meanwhile, self-starting o