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:
Nov. 19, 2024
Filed:
Jun. 26, 2024
Hefei University of Technology, Hefei, CN;
Xing Zhang, Hefei, CN;
Feng Han, Hefei, CN;
Xiangdui Zhan, Hefei, CN;
Yu Xiao, Hefei, CN;
Xinxin Fu, Hefei, CN;
HEFEI UNIVERSITY OF TECHNOLOGY, Hefei, CN;
Abstract
A multi-mode control method for a grid-connected inverter includes: continuously calculating an effective value Vof a voltage harmonic of a filtering capacitor; perturbing a control parameter to excite the voltage harmonic of the filtering capacitor; estimating a grid condition based on the perturbed control parameter and the effective value Vof the voltage harmonic of the filtering capacitor; and switching a control mode of the grid-connected inverter based on the estimated grid condition. The multi-mode control method provides a grid condition detection method, which excites the voltage harmonic by perturbing the control parameter and determines the grid condition by the relationship between the control parameter and the effective value of the voltage harmonic. The multi-mode control method eliminates the need for additional grid impedance measurement equipment, and adapts to complex grid conditions with significant changes in the system short-circuit ratio (SCR) and the system series compensation degree.