Reactor branch current monitoring system and method based on giant magnetoresistance effect
A branch current and monitoring system technology, applied in the field of power transmission and transformation, can solve problems such as cumbersome measurement process and complicated installation process
Inactive Publication Date: 2021-06-04
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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[0004] This application provides a reactor branch current monitoring system and method based on the giant magnetoresistance effect to solve the problems of complicated installation process and cumbersome measurement process in the prior art
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[0032] The embodiments will be described in detail hereinafter, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following examples do not represent all implementations consistent with this application. These are merely examples of systems and methods consistent with aspects of the present application as recited in the claims.
[0033] see figure 1 , is a schematic diagram of the structure of a reactor branch current detection system based on giant magnetoresistance effect provided in this application.
[0034] Generally speaking, when the dry-type air-core reactor works normally, the coil structure is stable, and the basic parameters of the reactor such as inductance, mutual inductance, and resistance are relatively fixed, so the branch current of each...
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The invention discloses a reactor branch current monitoring system and method based on a giant magnetoresistance effect, and relates to the technical field of power transmission and transformation. The system comprises a sensing module, an information processing module, a main control module and a wireless transmission module. The sensing module comprises a magnetoresistive current sensor provided with a giant magnetoresistive chip, the magnetoresistive current sensor is connected with an encapsulated outgoing line of a reactor, the output end of the sensing module is connected with the input end of a signal processing circuit, the output end of the signal processing circuit is connected with the input end of the main control module, and the output end of the main control module is connected with the input end of a wireless receiving module through a wireless communication module. According to the invention, the magnetoresistive current sensor is installed on the outgoing line of an encapsulated branch to monitor the current change of the branch in real time, the measurement accuracy is improved through an edge calculation mode, and data are transmitted to the wireless receiving module through a wireless communication mode, so that the turn-to-turn insulation state monitoring of the reactor is realized; and the system has the advantages of simple operation, convenient installation and high accuracy.
Description
technical field [0001] The present application relates to the technical field of power transmission and transformation, in particular to a reactor branch current monitoring system and method based on giant magnetoresistance effect. Background technique [0002] Reactor is an inductive high-voltage electrical appliance used to limit short-circuit current, reactive power compensation and shifting in power system. The magnetic flux forms a loop through the air. Dry-type air-core reactors have a large number of encapsulated branches, which are prone to aging of inter-turn insulation and the number of turns due to the influence of lack of production technology, transportation wear, bad operating weather conditions, or erosion by rain, snow, moisture, and bird droppings. Problems such as deviation or broken strands, and gradually develop into inter-turn insulation short circuit faults. When there is such a fault, it will lead to uneven distribution of the magnetic field inside th...
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IPC IPC(8): G01R19/25
CPCG01R19/25
Inventor 崔志刚何程张林山钱国超李波谭向宇韩晓东
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST