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:
Jan. 06, 2026
Filed:
Sep. 04, 2023
State Grid Information & Telecommunications Group Co., Ltd., Beijing, CN;
State Grid Info-telecom Great Power Science and Technology Co., Ltd., Fujian, CN;
Fujian Netpower Technology Development Co., Ltd., Fujian, CN;
Zhu Liu, Beijing, CN;
Wenjing Li, Beijing, CN;
Yunpeng Li, Beijing, CN;
Yonggui Wang, Beijing, CN;
Chuanjian Cui, Fujian, CN;
Lvchao Huang, Beijing, CN;
Xueyu Han, Beijing, CN;
Jinguo Fang, Beijing, CN;
Xiao Feng, Beijing, CN;
Xiaokang Lin, Fujian, CN;
Yuan Gao, Beijing, CN;
Shunhui Luo, Fujian, CN;
Shuying Cheng, Fujian, CN;
Tengfei Dong, Fujian, CN;
Chao Zhan, Fujian, CN;
Afeng Tan, Fujian, CN;
Abstract
Disclosed are an analog quantity acquisition method and apparatus. An acquisition circuit with a zero flux current transformer is first used to acquire a current signal, where the acquisition circuit with the zero flux current transformer includes the zero flux current transformer, a compensating winding, and a dynamic detection unit, and the compensating winding generates a reverse excitation potential to counteract an excitation current and eliminate impacts of a ratio error and a phase angle error on accuracy. A multi-segment amplification circuit is used to perform segmented amplification on different ranges of the current signal, and full-range current acquisition is achieved by using different amplification circuits. An analog-to-digital converter chip is used to convert an amplified current signal into a digital signal. The acquisition circuit with the zero flux current transformer is used to eliminate the impacts of the ratio error and the phase angle error on the measurement accuracy.