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:
Jul. 14, 2026
Filed:
Sep. 27, 2022
Shandong University, Jinan, CN;
Chenghui Zhang, Jinan, CN;
SHANDONG UNIVERSITY, Jinan, CN;
Abstract
A method for sensing power grid information based on nonlinear robust estimation, may include: acquiring a phase voltage signal of actual power grid; obtaining a nonlinear state-space distorted power grid model based on the phase voltage signal of actual power grid and a virtual orthogonal signal of phase voltage signal; establishing an H∞ smoothing estimation performance indicator based on the nonlinear state-space distorted power grid model, converting an H∞ smoothing estimation problem into a generalized Hsmoothing estimation problem according to the H∞ smoothing estimation performance indicator, and constructing an H∞ smoothing estimator; and obtaining an initial sensed amplitude value and an initial sensed phase value of power grid voltage signal by using the H∞ smoothing estimator, and performing zero-crossing point detection on the initial sensed amplitude and phase values of the power grid voltage signal to obtain sensed amplitude, frequency and phase values of a distorted voltage.
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