Title:
GROUNDING GRID TOPOLOGICAL STRUCTURE MEASUREMENT METHOD UNDER EXTREMELY COLD CONDITIONS
Document Type and Number:
WIPO Patent Application WO/2024/027015
Kind Code:
A1
Abstract:
The present invention sets forth a grounding grid topological structure measurement method under extremely cold conditions, comprising the steps of: in a transformer substation in an extremely cold region, according to a grounding grid branch and a node position in a selected area, determining on the ground surface of a grounding grid a measurement area S, acquiring a dynamic current value of a branch node of the grounding grid by means of a tunneling magnetoresistance (TMR)-based current sensor, and then indirectly acquiring the magnetic induction intensity of the measurement area S by means of conversion, comprising the magnetic induction intensity B
z
(x, y) in the direction perpendicular to the ground surface, and the magnetic induction intensity B
y
(x, y) in the direction parallel to the ground surface; by means of a software processing end, measuring and calculating the modulus |B
z
(1)(x, y)| of the first derivative and the modulus |B
z
(3)(x, y)| of the third derivative of the magnetic induction intensity B
z
(x, y) in the direction perpendicular to the ground surface, and the modulus |B
y
(2)(x, y)| of the second derivative of the magnetic induction intensity B
y
(x, y) in the direction parallel to the ground surface; and, according to the peak distance between the main lobe peak value and the side peak between main peaks of the modulus of each derivative, determining the specific position and the laying depth of the grounding grid branch in the measurement area S. The present method greatly reduces the amount of calculation and the measurement mode has strong anti-interference performance.
Inventors:
MING RUOTONG (CN)
YANG FAN (CN)
LI ZHILI (CN)
TAN TIAN (CN)
GE JIHUA (CN)
JIANG HUI (CN)
YANG ZIKANG (CN)
YANG FAN (CN)
LI ZHILI (CN)
TAN TIAN (CN)
GE JIHUA (CN)
JIANG HUI (CN)
YANG ZIKANG (CN)
Application Number:
PCT/CN2022/124236
Publication Date:
February 08, 2024
Filing Date:
October 10, 2022
Export Citation:
Assignee:
UNIV CHONGQING (CN)
International Classes:
G01B7/26; G01R19/00
Foreign References:
| CN104006736A | 2014-08-27 | |||
| CN113341195A | 2021-09-03 | |||
| CN104007308A | 2014-08-27 | |||
| CN103135137A | 2013-06-05 | |||
| CN109444510A | 2019-03-08 | |||
| JP2004045119A | 2004-02-12 |
Attorney, Agent or Firm:
BEIJING HENGLV INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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