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Passive lightning current sensor

A current sensor, passive lightning technology, applied in the direction of voltage/current isolation, measuring current/voltage, components of electrical measuring instruments, etc., can solve the problem of lack of effective measurement of outdoor lightning current, etc., to facilitate later maintenance and save energy , to avoid the effects of insufficient accuracy and reliability

Pending Publication Date: 2021-06-01
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a passive lightning current sensor capable of solving the problem of the lack of effective devices for measuring outdoor lightning current in the prior art

Method used

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with accompanying drawing:

[0021] Such as figure 1 As shown in , it is a schematic structural diagram of a passive lightning current sensor.

[0022] The passive lightning current sensor of the present invention includes a housing 1, and a fixing ring 13 that cooperates with the wire 4 is arranged on the upper side of the housing 1. The fixing ring 13 is a detachably assembled structure of two semicircular rings, and the inner wall of the housing 1 is provided with The supporting platform 11 is symmetrically provided with magnets 31 on both sides of the supporting platform 11 , and the magnets 31 are parallel to the axial direction of the connecting hole of the fixing ring 13 .

[0023] Such as figure 2 As shown, a magnetoelectric structure 2 is fixedly arranged in the middle of the support platform 11 . The magnetoelectric structure 2 includes two overlapping magnetostrictive sheets 21 , and a p...

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Abstract

The invention discloses a passive lightning current sensor, which comprises a shell. A fixing ring matched with a wire is arranged on the upper side of the shell, a supporting table is arranged on the inner side wall of the shell, magnets are symmetrically arranged on the two sides of the supporting table, and a magnetoelectric structure is fixedly arranged in the middle of the supporting table; the magnet is parallel to the axis direction of the connecting hole of the fixing ring; the magnetoelectric structure comprises two mutually overlapped magnetostrictive sheets, and a piezoelectric sheet is arranged between the magnetostrictive sheets. The problem that in the prior art, a device for effectively measuring outdoor lightning current is lacked can be solved, and measurement can be completed without an external power supply; the performance of the sensor can be adjusted by using a bias magnetic field; an opening-closing type detachable structure is used for solving the problem that an existing device cannot be detached after being installed; and the structure is simple, reliability is high and accuracy is good.

Description

technical field [0001] The invention relates to a current measuring device, in particular to a passive lightning current sensor. Background technique [0002] For electrical facilities that are fixed outdoors, lightning current is the main factor affecting the normal operation of the line, so the measurement of lightning current is particularly critical to reduce its impact. The lightning current belongs to the pulse current of microsecond level, so it has high requirements for the measurement accuracy of the sensor. [0003] The Rogowski coil is a current sensor based on the principle of electromagnetic induction, and it is the most widely used transient current sensor at present. Its structure is mainly a coil and an integral circuit. [0004] Measuring lightning current with Rogowski coils has high precision, but the cost of the entire detection system is relatively expensive, and the amplitude of the induction signal is low; in order to maintain good stability, the int...

Claims

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Application Information

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IPC IPC(8): G01R19/00G01R15/20G01R1/16G01R1/02
CPCG01R1/02G01R1/16G01R15/20G01R19/0053
Inventor 鲁彩江张紫嫣王景琦江雪玲曹中清华强董龙飞李林峰徐航
Owner SOUTHWEST JIAOTONG UNIV
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