State Grid Info-Telecom Great Power Science and Technology Co., Ltd.

State Grid Information & Telecommunications Group Co. Ltd.

Fujian Netpower Technology Development Co., Ltd.

Yonggui Wang

Yuan Gao

Xiao Feng

Wenjing Li

Zhu Liu

Yunpeng Li

Chuanjian Cui

Shunhui Luo

Lvchao Huang

Shuying Cheng

Xiaokang Lin

Xueyu Han

Tengfei Dong

Afeng Tan

Jinguo Fang

Chao Zhan

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.

Analog quantity acquisition method and apparatus

Growing community of inventors

Beijing, China

Yonggui Wang