Title:
ANALOG QUANTITY ACQUISITION METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/231578
Kind Code:
A1
Abstract:
An analog quantity acquisition method and device. The method comprises: firstly, acquiring current signals by using a zero-flux current transformer acquisition circuit; the zero-flux current transformer acquisition circuit comprising a zero-flux current transformer, a compensation winding, a dynamic detection unit, and an active network (S201); the compensation winding generating a reverse excitation potential to offset an excitation current and eliminate the impact of ratio error and phase error on precision; then, performing segmented amplification on current signals of different ranges by using a multi-segment amplification circuit (S202), implementing full-range current acquisition by means of different amplification circuits; and finally, converting the amplified current signals into digital signals by using an analog-to-digital conversion chip (S203). In this way, the impact of the ratio error and the phase error on the measurement precision is eliminated by using the zero-flux current transformer acquisition circuit; full-range current acquisition is implemented by means of different amplification circuits; and therefore, the problems of small current measurement range and low precision of a conventional metering detection device in the prior art are solved.
Inventors:
LIU ZHU (CN)
LI WENJING (CN)
LI YUNPENG (CN)
WANG YONGGUI (CN)
CUI CHUANJIAN (CN)
HUANG LVCHAO (CN)
HAN XUEYU (CN)
FANG JINGUO (CN)
FENG XIAO (CN)
LIN XIAOKANG (CN)
GAO YUAN (CN)
LUO SHUNHUI (CN)
CHENG SHUYING (CN)
DONG TENGFEI (CN)
ZHAN CHAO (CN)
TAN AFENG (CN)
LI WENJING (CN)
LI YUNPENG (CN)
WANG YONGGUI (CN)
CUI CHUANJIAN (CN)
HUANG LVCHAO (CN)
HAN XUEYU (CN)
FANG JINGUO (CN)
FENG XIAO (CN)
LIN XIAOKANG (CN)
GAO YUAN (CN)
LUO SHUNHUI (CN)
CHENG SHUYING (CN)
DONG TENGFEI (CN)
ZHAN CHAO (CN)
TAN AFENG (CN)
Application Number:
PCT/CN2023/087428
Publication Date:
December 07, 2023
Filing Date:
April 11, 2023
Export Citation:
Assignee:
STATE GRID INFORMATION & TELECOMMUNICATIONS GROUP CO LTD (CN)
STATE GRID INFO TELECOM GREAT POWER SCIENCE AND TECH CO LTD (CN)
FUJIAN NETPOWER TECH DEVELOPMENT CO LTD (CN)
STATE GRID INFO TELECOM GREAT POWER SCIENCE AND TECH CO LTD (CN)
FUJIAN NETPOWER TECH DEVELOPMENT CO LTD (CN)
International Classes:
G01R19/02; G01R25/00; G01R35/00
Foreign References:
| CN115015620A | 2022-09-06 | |||
| CN114284047A | 2022-04-05 | |||
| CN214750535U | 2021-11-16 | |||
| CN205826736U | 2016-12-21 | |||
| CN106526287A | 2017-03-22 | |||
| JPH09171935A | 1997-06-30 | |||
| CN201344949Y | 2009-11-11 | |||
| CN103412168A | 2013-11-27 | |||
| CN204855663U | 2015-12-09 | |||
| CN207459701U | 2018-06-05 | |||
| JPH03235065A | 1991-10-21 |
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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