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Calibration method for ultrahigh-frequency partial discharge online monitoring device in field environment

A monitoring device and field environment technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve problems such as inability to adopt and calibrate, and achieve the effect of ensuring the integrity rate, reducing the possibility of equipment damage, and improving confidence.

Inactive Publication Date: 2017-12-05
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the internal structure of GIS, the attenuation and propagation paths of electromagnetic waves are different, and the performance of built-in and external sensors is different, so it is impossible to calibrate it by establishing a standard electric field environment (GTEM)

Method used

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  • Calibration method for ultrahigh-frequency partial discharge online monitoring device in field environment
  • Calibration method for ultrahigh-frequency partial discharge online monitoring device in field environment
  • Calibration method for ultrahigh-frequency partial discharge online monitoring device in field environment

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Experimental program
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Effect test

Embodiment 1

[0040] As shown in the figure, this embodiment provides a method for calibrating a UHF partial discharge online monitoring device in an on-site environment, including the following steps:

[0041] Connect the measurement host with the sensor under test;

[0042] Inject ultra-high frequency electromagnetic wave signals into the sensor under test through the signal generator,

[0043] Obtain the measured response signal of the measured online monitoring device through the measuring host;

[0044] Keep the injected ultra-high frequency electromagnetic wave signal unchanged, and disconnect the electrical connection between the sensor under test and the measuring host;

[0045] Use radio frequency cables to connect the measurement host with the measurement module of the measurement standard;

[0046] Obtain the standard response signal of the sensor under test through the measurement host;

[0047] Calibration results are generated from the standard response signal and the measu...

Embodiment 2

[0065] The calibration method of the UHF partial discharge online monitoring device provided in this embodiment uses the measurement of the output value of the sensor, combined with the standard signal of the measurement host of the online monitoring device, to comprehensively judge the online partial discharge monitoring of the UHF method The magnitude of the device. The device is small in size and easy to carry, and can also calibrate the main performance and parameter indicators of the ultra-high frequency partial discharge on-line monitoring device in the field environment. There is a significant difference in the way the signal is injected.

[0066] Key parameters of UHF partial discharge in the field environment: GIS partial discharge online monitoring requires monitoring under the field conditions of GIS operation. Due to corona discharge and other reasons, there are a large number of electromagnetic interference signals under field conditions. Especially in the freque...

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Abstract

The invention discloses a calibration method for an ultrahigh-frequency partial discharge online monitoring device in a field environment. Firstly, connection between a monitored sensor and a measurement host is kept, ultrahigh-frequency electromagnetic wave signals are injected to the monitored sensor through a signal generator, and the measurement host acquires measured response signals of the monitored online monitoring device; then, the injected ultrahigh-frequency electromagnetic wave signals are kept unchanged, electrical connection between the monitored sensor and the measurement host is cut off, a radio frequency cable is adopted to be connected with a measurement module with standard measurement, and standard response signals of the monitored sensor are acquired; and finally, through the standard response signals and the measured response signals, a calibration result is generated. According to the calibration method provided by the invention, the calibration efficiency is improved, the human errors are reduced, the confidence of calibration data is improved, and influences on the test by factors such as distribution parameters introduced by frequent wiring, the connection reliability degree and external interference can be reduced.

Description

technical field [0001] The invention relates to the field of on-site detection devices for power grids, in particular to a method for calibrating an ultra-high frequency partial discharge online monitoring device in a field environment. Background technique [0002] In the power production industry, the general-purpose testing equipment used has standard input and output interfaces and corresponding metrological verification procedures or calibration specifications. It is relatively easy to automate the verification or calibration work. For special test equipment, it is quite difficult to automate the calibration work. The first problem is that the special test equipment does not have a unified standard interface. The existing online monitoring devices usually use different test interfaces for the calibrated objects of different manufacturers. , which brings a lot of inconvenience to the calibration test work. First, there are many types of connection interfaces, and the int...

Claims

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Application Information

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IPC IPC(8): G01R35/00
CPCG01R35/005
Inventor 梁星吴华侯兴哲周全米思蓓赵福平陈文礼周景超
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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