US 12,230,970 B2
Diesel-storage independent microgrid and virtual dynamic synchronous control method and system therefor
Leming Zhou, Guangdong (CN); Weilang Yi, Guangdong (CN); Yandong Chen, Guangdong (CN); Shuke Wang, Guangdong (CN); Qi Liu, Guangdong (CN); Jie Zhou, Guangdong (CN); Qingguang Zeng, Guangdong (CN); and An Luo, Guangdong (CN)
Assigned to Guangdong Zhicheng Champion Group Co., Ltd., Guangdong (CN)
Appl. No. 18/020,372
Filed by GUANGDONG ZHICHENG CHAMPION GROUP CO., LTD., Guangdong (CN)
PCT Filed Apr. 19, 2022, PCT No. PCT/CN2022/087562
§ 371(c)(1), (2) Date Feb. 8, 2023,
PCT Pub. No. WO2023/082546, PCT Pub. Date May 19, 2023.
Claims priority of application No. 202111319301.7 (CN), filed on Nov. 9, 2021.
Prior Publication US 2024/0283254 A1, Aug. 22, 2024
Int. Cl. H02J 3/44 (2006.01); H02J 3/32 (2006.01); H02J 3/38 (2006.01)
CPC H02J 3/44 (2013.01) [H02J 3/32 (2013.01); H02J 3/381 (2013.01); H02J 2203/10 (2020.01); H02J 2300/10 (2020.01)] 14 Claims
OG exemplary drawing
 
1. A method for calculating a dynamic synchronous torque damping coefficient of a diesel-storage independent microgrid, wherein the diesel-storage independent microgrid comprises a diesel generator and an energy storage battery; the diesel generator is connected to a power supply bus; the energy storage battery is connected to the power supply bus through an energy storage converter; the power supply bus is connected to a conventional load and a pulsed load; the dynamic synchronous torque damping coefficient Hdamp is calculated by the following formula:

OG Complex Work Unit Math
wherein Hdamp0 represents a steady-state value of the dynamic synchronous torque damping coefficient, k is an adaptive adjustment factor, and C is a threshold value of the difference between the angular acceleration ag1 of the diesel generator and the angular acceleration ag2 of the energy storage converter; ω1 and ω2 are respectively the voltage angular frequency of the diesel generator and the voltage angular frequency of the energy storage converter.