The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 21, 2025
Filed:
May. 19, 2025
Sichuan University, Sichuan, CN;
Ying Wang, Chengdu, CN;
Shuyuan Zhang, Chengdu, CN;
Xianyong Xiao, Chengdu, CN;
Shiru Jia, Chengdu, CN;
Xinyue Wang, Chengdu, CN;
Xuqing Tang, Chengdu, CN;
Xiaoyang Ma, Chengdu, CN;
SICHUAN UNIVERSITY, Chengdu, CN;
Abstract
Disclosed is a method and system for SE voltage sag control based on flexible multiplexing of an energy storage system. The present disclosure achieves controlling of an early stage of the voltage sag using a supercapacitor, and continuous controlling of a late stage of the voltage sag using the energy storage system; achieves real-time accurate detection of the voltage sag on a grid side and a load side; achieves optimal energy compensation through flexible switching in an input stage and an output stage to prevent SE from tripping due to a phase jump caused by the optimal energy compensation; on a DC/DC side, performs power frequency division control based on a difference in response features between the supercapacitor and the lithium battery energy storage system; on a DC/AC side, provides a composite control system including a voltage feedforward loop, a voltage feedback outer loop, and a current feedback inner loop.