Coordination control method applied to flywheel energy storage matrix system of wind power plant

Abstract

The invention discloses a coordination control method applied to a flywheel energy storage matrix system of a wind power plant. The method comprises the following steps of: (1) establishing a wind power plant flywheel energy storage matrix topological structure; (2) establishing a control system of a flywheel energy storage matrix; (3.1) performing flywheel energy storage matrix system discharge control, wherein when Prfw is less than or equal to POmaxj, a flywheel energy storage unit j is solely connected, and when Prfw is more than or equal to POmax1, first m flywheel energy storage units with the highest rotation speed need to be selected one by one; and (3.2) performing flywheel energy storage matrix charge control, wherein when the absolute value of Prfw is less than or equal to PImaxj, the flywheel energy storage unit j is solely connected for energy storage, and when the absolute value of Prfw is more than or equal to PImaxn, first m flywheel energy storage units with the lowest rotation speed need to be selected one by one. By virtue of the coordination control method, the advantages of the flywheel energy storage matrix system is given full play more effectively, the unit switching loss and operation loss are reduced, the stability of the flywheel energy storage matrix system and a power system is ensured, and thus the quality of electric energy output from wind power is improved.

Description

technical field [0001] The invention relates to a flywheel control method applied to a wind farm, in particular to a coordinated control method of a flywheel energy storage matrix system applied to a wind farm. Background technique [0002] The flywheel energy storage matrix system composed of multiple flywheel energy storage units can cooperate with renewable energy power systems such as wind power generation to smooth the active output power of the system and stabilize the output voltage of the system, thereby improving the stability of the power system, increasing the renewable energy and network capacity. [0003] Flywheel energy storage technology is a technology that stores electrical energy as the kinetic energy of the flywheel rotor rotation. Through the control of the system, the flywheel energy storage system can store or release energy when necessary, so as to smooth the output active power of the power generation system and compensate the power. The reactive pow...

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Problems solved by technology

[0010] In the prior art, there is no coordinated operation control between multi-flywheel energy storage units based on the topological structure of the wind farm and the flywheel group, which can effectively take advantage of the advantages of the flywheel energy storage system, that is, there is a flywheel switching loss in the prior art And the operation loss is large, the stability of the flywheel energy storage matrix system cannot be guaranteed, and the stability of the power system cannot be guaranteed, and the quality of wind power output power cannot be improved more effectively.

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