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Standard electric field generating device under different voltage waveforms and electric field measuring instrument calibration device

A technology of voltage waveform and generating device, which is applied to measuring devices, measuring electrical variables, instruments, etc., can solve problems such as inability to calibrate, and achieve the effect of effective calibration

Active Publication Date: 2018-10-09
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently there is no standard electric field generating device for impulse voltage, so the electric field measuring instrument for measuring impulse voltage cannot be calibrated

Method used

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  • Standard electric field generating device under different voltage waveforms and electric field measuring instrument calibration device
  • Standard electric field generating device under different voltage waveforms and electric field measuring instrument calibration device
  • Standard electric field generating device under different voltage waveforms and electric field measuring instrument calibration device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A standard electric field generating device under different voltage waveforms, such as figure 1 As shown, it includes: high voltage bushing 1, high voltage electrode 2, ground electrode 6, pressure equalizing ring 3, voltage equalizing resistor 5, tempered glass shell 8, supporting insulating cylinder 7, grounding copper foil 9 and fixed support 10;

[0027] Such as figure 1 As shown, the tempered glass housing 8 has a rectangular parallelepiped shape, and the tempered glass housing is convenient for observing the internal condition of the device, and is fixed on the ground and isolated from the ground by a fixed support 10. A high-voltage electrode 2 and a ground electrode 6 are arranged inside. The high-voltage electrode 2 and the ground electrode 6 are concentrically arranged circular metal plates; the high-voltage electrode 2 is fixed on the upper end surface of the tempered glass shell 8 through the high-voltage sleeve 1 and passes through the high-voltage sleeve The t...

Embodiment 2

[0035] An electric field measuring instrument calibration device used to calibrate electric field measuring instruments used in the environment of impulse voltage electric field, such as image 3 Shown, including:

[0036] The impulse voltage generator 10 is used to provide impulse voltage;

[0037] The standard electric field generating device 11 described in the first embodiment is used to convert the impulse voltage into a standard electric field;

[0038] The impulse resistance voltage divider 12 is connected in parallel with the standard electric field generating device 11;

[0039] The digital oscilloscope 13 is connected to the low voltage end of the impulse resistance voltage divider 12; the voltage signal of the low voltage end of the impulse resistance voltage divider 12 is connected to the digital oscilloscope 13 through a coaxial cable. A PC (not shown in the figure) is connected to the digital oscilloscope 13 through a network cable, and the shock waveform collected by th...

Embodiment 3

[0046] An electric field measuring instrument calibration device, used to calibrate electric field measuring instruments in a power frequency voltage electric field environment, such as Figure 4 Shown, including:

[0047] Power frequency voltage generator 14, used to provide power frequency voltage;

[0048] The standard electric field generating device 11 described in the first embodiment is used to convert the power frequency voltage into a standard electric field;

[0049] The power frequency capacitive voltage divider 15 is connected in parallel with the standard electric field generating device 11;

[0050] The digital multimeter 16 is connected to the low voltage end of the power frequency capacitive voltage divider 15; the output voltage of the low voltage end of the power frequency capacitive voltage divider 15 enters the digital multimeter 16, which can measure the effective value of the power frequency voltage.

[0051] The procedure for performing electric field calibration...

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Abstract

The invention discloses a standard electric field generating device under different voltage waveforms. The device comprises a high voltage electrode, a grounding electrode, grading rings and grading resistors. The high voltage electrode and the grounding electrode are used for connecting the two poles of an impulse voltage generator. There is a distance between the high voltage electrode and the grounding electrode. The plurality of grading rings are arranged between the high voltage electrode and the grounding electrode. And the grading resistors are arranged between the adjacent grading rings. By using the standard electric field generating device under the different voltage waveforms, the grading resistors are connected among the grading rings so that the voltage of each layer of grading rings is uniformly reduced and the uniform electric field of an impulse voltage can be generated. The invention also discloses an electric field measuring instrument calibration device used for calibrating an electric field measuring instrument.

Description

Technical field [0001] The invention belongs to the field of field intensity meter calibration, and specifically relates to a standard electric field generating device under different voltage waveforms and an electric field measuring instrument calibration device. Background technique [0002] The national standard stipulates that the calibration of the electric field measuring instrument should be carried out in a sufficiently large uniform electric field, and the measurement in the gas medium should be calibrated in the gas. At present, the electric field measuring instrument on the market is mainly used to measure the power frequency voltage, and the calibration factor generally adopts the power frequency electric field calibration. There is currently no standard electric field generator for impulse voltage, so the electric field measuring instrument for measuring impulse voltage cannot be calibrated. Summary of the invention [0003] The technical problem to be solved by the ...

Claims

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Application Information

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IPC IPC(8): G01R35/00
CPCG01R35/007
Inventor 龙兆芝李文婷肖凯刘少波张弛王海燕余也凤
Owner CHINA ELECTRIC POWER RES INST
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