Method for improving DC bus voltage robustness of high-speed flywheel energy storage array

• Main Authors: ZHANG DAN, ZHANG LIANG, CHEN JIE, SHUI HENGHUA, ZHAO SIFENG, ZHOU YUNHONG, CHEN YING, WEI TONGZHEN, TAO YIBIN, SANG BINGYU, YANG BO, WANG JINHAO
• Format: Patent
• Language: Chinese; English
• Published: 29.07.2022
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention discloses a method for improving the voltage robustness of a direct-current bus of a high-speed flywheel energy storage array, and relates to the technical field of flywheel energy storage. According to the method, a reference value and a real-time value of a direct-current bus voltage serve as input signals of an array controller, and a state observer and an error feedback controller are constructed while tracking differentiators of a proportional link and a differential link are designed. Wherein the state observer estimates real-time values of internal and external disturbance of the system according to input signals, and the error feedback controller feeds back observed disturbance quantity to the preceding stage of the controller. And finally, distributing a real-time adjusting signal of the array controller to a bottom-layer high-speed flywheel unit controller in an equal-torque charging and discharging strategy mode, wherein the real-time adjusting signal is used for coping with the volta