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Device and method for testing noise immunity of power frequency magnetic field of electric energy meter

A power frequency magnetic field and test device technology, applied in the field of electric energy, achieves stable performance, accurate evaluation, and novel structure

Inactive Publication Date: 2014-04-16
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is not yet a complete set of devices and methods for testing the automation of electric energy meters.

Method used

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  • Device and method for testing noise immunity of power frequency magnetic field of electric energy meter
  • Device and method for testing noise immunity of power frequency magnetic field of electric energy meter
  • Device and method for testing noise immunity of power frequency magnetic field of electric energy meter

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Experimental program
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Embodiment

[0111] Such as figure 2 As shown, the 0.02-level standard power supply of the present invention provides standard working power to the electric energy meter. The electric energy meter is placed on the tray, which can carry three electric energy meters at the same time. The tray is placed on the tray support plate, and the tray support plate is placed inside the coil.

[0112] The coil includes a coil skeleton and a winding wire, and the coil is driven by a motor to complete the rotation. The excitation power supply provides working power to the coil.

[0113] The excitation power supply is placed at the bottom of the coil automatic turning device, and it can also be placed in other parts according to actual needs, and is not limited to a single placement position. The excitation power supply provides working power for the coil, the synchronous belt is connected up and down with the synchronous wheel, and the synchronous motor drives the synchronous wheel to move, and the mov...

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Abstract

The invention provides a device and method for testing the noise immunity of a power frequency magnetic field of an electric energy meter. The device comprises a 0.02 level standard equipment cabinet, an exciting current source and an automatic coil overturning device. The automatic coil overturning device comprises a proximate matter frame, a motor driving device, an electric energy meter rotating mechanism and an electromagnetic coil. The exciting current source is placed on the bottom layer of the automatic coil overturning device. An automatic power frequency magnetic field detecting coil module is placed inside the automatic coil overturning device. The method includes the steps that (1) a working power supply is supplied to the electric energy meter by a 0.02 level power source, and the electric energy meter is placed on a tray; (2) electricity is supplied to the coil by the exciting source; (3) the coil is driven by a motor to rotate; (4) test data are uploaded to a computer, so that a test is completed. According to the device and method, the degree of automation is high, the reliability of the test data is greatly improved, the automation verification of the electric energy meter can be achieved, manual intervention is needless, the test data are accurate and reliable, and the performance is stable.

Description

technical field [0001] The invention belongs to the technical field of electric energy, and in particular relates to an electric energy meter power frequency magnetic field immunity test device and a method thereof. Background technique [0002] During the field operation of the electric energy meter, it was found that the power users in some areas did not use electricity, and the meter still accumulated a very small amount of electric energy. The reason is analyzed that the unreasonable field wiring makes the installation position of the electric energy meter generate a strong power frequency magnetic field. Since the meter has no effective antimagnetic measures, the current sampling circuit generates an induced current in an alternating magnetic field environment, resulting in an increase in electricity. In order to avoid the recurrence of such incidents, the smart energy meter standard requires that the direct-connected energy meter is under 0.5mT power frequency magnetic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/04
Inventor 郜波姜洪浪朱亚珂郭清营姬云涛左嘉江小强
Owner STATE GRID CORP OF CHINA
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