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Checking system and checking method for integrated partial discharge live detection device

A technology of live detection and partial discharge, which is applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems that live detection devices cannot adapt to the electromagnetic interference environment of substations, the detection effectiveness is reduced, and the environment is complex, so as to reduce the threshold and total The effect of volume reduction and simple operation

Inactive Publication Date: 2017-09-01
BEIJING HUADIAN ZHICHENG ELECTRICAL EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problems existing in the prior art are: due to the complex field test conditions and environment, there are a large number of electromagnetic interference signals and corona discharge signals
However, the problem of electromagnetic interference is a key technical bottleneck that has plagued the technical promotion of partial discharge live detection devices for a long time. The performance of the live detection device itself is far from being able to adapt to the complex electromagnetic interference environment of the substation site
This often leads to a serious decrease in the effectiveness of detection

Method used

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  • Checking system and checking method for integrated partial discharge live detection device
  • Checking system and checking method for integrated partial discharge live detection device
  • Checking system and checking method for integrated partial discharge live detection device

Examples

Experimental program
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Effect test

Embodiment 1

[0067] Such as image 3 As shown, the integrated partial discharge charging detection device verification system provided by the embodiment of the present application includes: a pulse generator 1 , a UHF detector host 3 , a transmitting antenna 4 , and a UHF receiving sensor 5 .

[0068] The output voltage of the pulse generator 1 should be between 5V-200V, set 10V / 20V / 50V / 100V / 150V / 200V, etc., the rising edge of the input pulse waveform should meet ≤600ps, and the pulse width should be between 4ns-100ns. The pulse generator 1 should be designed to be hand-held. The output amplitude stability of the pulse generator 1 is required to reach more than 95%.

[0069] The detection of UHF partial discharge belongs to non-contact measurement, so the coupling device is essentially the transmitting antenna 4, and the transmitting antenna 4 can use an end probe. After the pulse generator 1 is installed with the transmitting antenna 4, it can be called a transmitting device, and the di...

Embodiment 2

[0077] Such as Figure 5 As shown, the integrated partial discharge live detection device verification system provided by the embodiment of the present application includes: pulse generator 1, HF detector host 19, coaxial cable 6, matching tooling 7, 50Ω matching head 8, RFCT ferrule 9 .

[0078] The pulse generator 1 is connected to the HF detector host 19 through the coaxial cable 6, and the coaxial cable 6 is equipped with a matching tool 7, a 50Ω matching head 8, and an RFCT ferrule 9.

[0079] The pulse polarity of pulse generator 1 can be positive and negative conversion, the rise time of the pulse waveform is not more than 0.1us, the fall time is not less than 100us, the peak value of the output pulse voltage is adjustable in the range of 10mV-5V, and the adjustment range is divided into 10mV / 20mV / 50mV / 1V / 2V / 3V / 4V / 5V several gears are enough. The pulse generator 1 should be designed to be hand-held. The output amplitude stability of the pulse generator 1 is required...

Embodiment 3

[0088] Such as Figure 6 As shown, the integrated partial discharge live detection device verification system provided by the embodiment of the present application includes: a pulse generator 1 , a coaxial cable 6 , a 50Ω matching head 8 , a metal plate 10 , and a TEV detector host 11 .

[0089] The pulse generator 1 is connected to the host 11 of the TEV detector through the coaxial cable 6 , a 50Ω matching head 8 is connected in series on the coaxial cable 6 , and a metal plate 10 is connected in parallel on the coaxial cable 6 .

[0090] The pulse polarity of pulse generator 1 can be positive and negative conversion, the rise time of the pulse waveform is not more than 0.1us, the fall time is not less than 100us, the peak value of the output pulse voltage is adjustable in the range of 10mV-5V, and the adjustment range is divided into 10mV / 20mV / 50mV / 1V / 2V / 3V / 4V / 5V several gears are enough. The pulse generator 1 should be designed to be hand-held, and the output amplitude s...

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Abstract

The invention belongs to the field of the on-site checking technology for high-voltage electrical equipment partial discharge live detection devices and discloses a checking system and a checking method for an integrated partial discharge live detection device. The system comprises a pulse generator for sending out a simulation discharge signal and configured to cover the major frequency range of various discharge modes; a coupling device connected with the pulse generator and used for sending a pulse signal; and a detector host connected with the coupling device and used for collecting the pulse signal of the coupling device, and judging whether the performance of the detection system is normal or not according to the comparison result between the detected amplitude of the signal and a historical record. According to the invention, the system and the method can meet the requirement of the on-site checking operation. The overall size of a detection platform is reduced by 70%, and the size of a carried checking device is reduced. The checking efficiency is improved by 30%, and the network access threshold of the live detection device is reduced.

Description

technical field [0001] The application belongs to the technical field of on-site verification of a partial discharge electrification detection device for high-voltage electrical equipment, and in particular relates to an integrated partial discharge electrification detection device verification system and method. Background technique [0002] At present, partial discharge live detection devices have been widely used in partial discharge detection of power equipment, and the four most commonly used methods are: high frequency, ultrasonic, ultra-high frequency and transient ground voltage. The effectiveness of the detection device is a key factor in determining the efficiency or effect of live detection; its detection effectiveness depends on the working state, sensitivity, and anti-interference performance of the device. On-site electromagnetic interference, noise, vibration and other complex interference are important factors affecting the detection effect; due to the perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
CPCG01R35/00
Inventor 唐志国王倩邱凯陈建奇张海波宋宝磊
Owner BEIJING HUADIAN ZHICHENG ELECTRICAL EQUIP CO LTD
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