Non-contact twin-core cable current measurement method and device
A two-core cable, non-contact technology, applied in the direction of measuring device, voltage/current isolation, current only measurement, etc., to achieve the effect of reducing measurement error
Active Publication Date: 2022-04-15
CHINA SOUTHERN POWER GRID DIGITAL GRID RES INST CO LTD
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[0004] Based on this, it is necessary to provide a non-contact twin-core cable current measurement method, device, Computer Equipment and Storage Media
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[0045] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.
[0046] The non-contact twin-core cable current measurement method provided by this application can be applied to such as figure 1 shown in the application environment. Wherein, the measuring device 104 measures the current of the twin-core cable 102 in a non-contact manner. The two conductors in the twin-core cable 102 are located in the position ring, and the current direction is opposite and perpendicular to the plane where the position ring is located. The measuring device 104 includes There are four magnetoresistive sensor chips, which are located on the position ring...
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The application relates to a non-contact twin-core cable current measurement method, device, computer equipment and storage medium. The method includes: determining the position rings of the four magnetoresistive sensor chips, obtaining the radius R of the position rings according to the position rings, measuring the distance x from any one of the wires to the center of the position rings, and the four magnetoresistive sensor chips. The magnetic induction measurement value of the resistance sensor chip, according to the magnetic induction measurement value, the final value B of the magnetic induction measurement value is obtained 1 , B 2 , B 3 , B 4 , according to the radius R of the position circle, the distance x from any one of the measuring wires to the center of the position circle, and the final value B of the magnetic induction measurement value 1 , B 2 , B 3 , B 4 , to obtain the twin-core rotation angle θ 1 , according to the twin-core rotation angle θ 1 , to obtain the twin-core cable current I. The method realizes that the current sensor based on the magnetoresistive sensor chip can measure the twin-core cable current at any twin-core rotation angle.
Description
technical field [0001] The present application relates to the technical field of power system measurement, in particular to a non-contact twin-core cable current measurement method, device, computer equipment and storage medium. Background technique [0002] As the new generation of smart grid puts forward higher requirements for the perception and monitoring of electrical quantities, traditional electrical quantity measurement methods have been difficult to meet the basic needs of smart grids for comprehensive and real-time perception information. Existing data acquisition devices (such as current transformers) Due to problems such as large size, high cost, need for external power supply, limited accuracy, and inconvenient installation, universal installation and collection cannot be realized. Therefore, it is urgent to develop a low-cost, small-sized, and easy-to-install non-contact current sensor. [0003] At present, the current measurement of the power system still main...
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IPC IPC(8): G01R19/00G01R15/20
CPCG01R19/0092G01R15/205
Inventor 李鹏吕前程田兵陈仁泽王志明徐振恒谭则杰
Owner CHINA SOUTHERN POWER GRID DIGITAL GRID RES INST CO LTD