US 12,136,818 B2
Thermal power unit-flywheel energy storage cooperative frequency regulation control method and system
Feng Hong, Beijing (CN); Lu Liang, Beijing (CN); Xinyi Jia, Beijing (CN); Junhong Hao, Beijing (CN); Yanjun Du, Beijing (CN); Wei Wang, Beijing (CN); and Fang Fang, Beijing (CN)
Assigned to NORTH CHINA ELECTRIC POWER UNIVERSITY, Beijing (CN)
Filed by NORTH CHINA ELECTRIC POWER UNIVERSITY, Beijing (CN)
Filed on Jun. 13, 2023, as Appl. No. 18/334,153.
Claims priority of application No. 202210672280.5 (CN), filed on Jun. 14, 2022.
Prior Publication US 2023/0411964 A1, Dec. 21, 2023
Int. Cl. H02J 3/30 (2006.01); H02J 3/24 (2006.01)
CPC H02J 3/30 (2013.01) [H02J 3/24 (2013.01); H02J 2203/20 (2020.01)] 8 Claims
OG exemplary drawing
 
1. A thermal power unit-flywheel energy storage cooperative frequency regulation control method, comprising:
obtaining a real-time operating parameter of a thermal power unit, a difference adjustment coefficient of a governor, a grid frequency deviation, a current state of charge of an energy storage battery and a rated power of an energy storage system;
obtaining a predicted value of an output power increment of the thermal power unit by using a dynamic model of the thermal power unit according to the real-time operating parameter of the thermal power unit;
determining an initial power instruction of a flywheel energy storage system according to the predicted value of the output power increment of the thermal power unit, the difference adjustment coefficient of the governor and the grid frequency deviation;
obtaining a real-time maximum discharge power of the flywheel energy storage system by using a Logistic regression function according to the current state of charge of the energy storage battery and the rated power of the energy storage system;
selecting a minimum value between the real-time maximum discharge power of the flywheel energy storage system and the initial power instruction of the flywheel energy storage system as a real-time frequency regulation power instruction of the flywheel energy storage system, and sending it to the flywheel energy storage system;
determining a frequency regulation power instruction of the thermal power unit according to the difference adjustment coefficient of the governor and the grid frequency deviation, and sending it to the thermal power unit.