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Line current measuring method, device and equipment in power system and storage medium

A line current and power system technology, applied in the direction of measuring devices, measuring electrical variables, measuring current/voltage, etc., can solve the problems of difficult installation and low measurement accuracy, and achieve the goal of reducing installation difficulty and improving measurement accuracy Effect

Active Publication Date: 2019-01-29
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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Problems solved by technology

[0005] The embodiment of the present application provides the measurement method, device, equipment and storage medium of the line current in the power system to solve the problem caused by the difficulty of installation when a single magnetic sensor is used to measure the line current in the power system in the prior art low accuracy problem

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  • Line current measuring method, device and equipment in power system and storage medium

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Embodiment Construction

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0044] The core of the present invention is to provide a measurement method, device, equipment and storage medium for the line current in the power system, which can solve the measurement problem caused by the difficulty of installation when a single magnetic sensor is used to measure the line current in the power system in the prior art The problem of low accuracy.

[0045] In order to enable those skilled in the art to better understand the...

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Abstract

The invention discloses a line current measuring method in a power system. The current value of a lead to be measured can be calculated by only obtaining first, second and third magnetic induction intensity generated by three uniaxial magnetic sensors in the magnetic sensitive directions respectively and the relative distances among the three uniaxial magnetic sensors, and the current of the leadto be measured is measured. The three uniaxial magnetic sensors are positioned in the same straight line, the straight line and the lead to be measured are not coplanar, the magnetic sensitive directions of the three uniaxial magnetic sensors are in the same direction and are in parallel with the straight line where the three uniaxial magnetic sensors are positioned. During installation, it is notrequired to fix the relative positions of primary loop lead and the three uniaxial magnetic sensors, installation is less difficult, and the measuring accuracy is improved. The invention also discloses a line current measuring device and equipment in the power system and a storage medium with the above effects.

Description

technical field [0001] The invention relates to the field of line detection, in particular to a method, device, equipment and storage medium for measuring line current in a power system. Background technique [0002] In the power system, the line current is one of the important parameters that must be measured in the power system. It reflects the operating state of the power system and is an indispensable input variable for the optimal operation, control, protection and other functions of the power system. Therefore, certain technical means must be used to measure the line current, and the measurement accuracy and response speed should meet the requirements of different functions of the power system. [0003] The AC current of traditional power system lines is mainly measured by current transformers. However, current transformers are large in size and heavy in weight. DC current; the current sensor using the Hall effect principle can measure DC current, but it also needs to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
CPCG01R19/00
Inventor 李鹏田兵袁智勇李立浧
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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