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Synchronization Signal Generator for Cable Partial Discharge Testing

A partial discharge and synchronous signal technology, which is applied in the direction of testing dielectric strength, etc., can solve the problems of increasing manpower and time costs, difficulty in carrying out partial discharge testing smoothly, and difficulty in obtaining synchronous signals, etc., to achieve the effect of saving manpower and time costs

Active Publication Date: 2018-01-05
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult for the partial discharge tester to obtain the synchronous signal, which makes it difficult for the partial discharge test to be carried out smoothly
If the partial discharge tester is placed on the pressurized part of the cable to obtain the synchronous signal, then the corresponding test connector needs to be hard-wired to lead the signal to the partial discharge tester, which is complicated, expensive, and increases manpower and time cost

Method used

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  • Synchronization Signal Generator for Cable Partial Discharge Testing
  • Synchronization Signal Generator for Cable Partial Discharge Testing
  • Synchronization Signal Generator for Cable Partial Discharge Testing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] see image 3 As shown, it is a structural schematic diagram of Embodiment 1 of a synchronous signal generator for partial discharge testing of cables according to the present invention.

[0026] Such as image 3 As shown, the synchronous signal generator used for the cable partial discharge test in the first embodiment includes a first RTC (Real-Time Clock, real-time clock) module 101, a first communication module 102 arranged at the cable pressurization place, and a Including a second RTC module 201, a second communication module 202, a signal generation module 203 and a DA (Digital to Analog, digital-to-analog) conversion module 204 arranged at the partial discharge test point;

[0027] The first RTC module 101 is connected to the first communication module 102, and the second RTC module 201, the second communication module 202, the signal generation module 203 and the DA conversion module 204 are connected in sequence;

[0028] performing wireless communication bet...

Embodiment 2

[0036] see Figure 4 As shown, it is a schematic structural diagram of Embodiment 2 of the synchronous signal generator for cable partial discharge testing of the present invention. The difference between this embodiment and Embodiment 1 is that, considering that sometimes the amplitude of the voltage signal generated by the signal generation module 203 will be small, and the synchronous voltage signal required by the field test is relatively large, therefore, as Figure 4 As shown, on the basis of the first embodiment above, the synchronous signal generator for cable partial discharge testing in this embodiment may further include a signal amplifier 205 connected to the DA conversion module 204 .

[0037] In a specific implementation, the signal amplifier 205 may be a triode amplifier circuit.

Embodiment 3

[0039] see Figure 5 As shown, it is a schematic structural diagram of Embodiment 3 of the synchronous signal generator for cable partial discharge testing of the present invention. The difference between this embodiment and Embodiment 1 is that considering that the second RTC module 201, the second communication module 202, the signal generation module 203 and the DA conversion module 204 all need energy consumption during operation, for this reason, as Figure 4 As shown, on the basis of the first embodiment above, the synchronous signal generator for cable partial discharge test in this embodiment can also include a power supply device 206, and the power supply device 206 is connected to the signal generation module 203 to realize the second The power supply of the RTC module 201 , the second communication module 202 , the signal generation module 203 and the DA conversion module 204 .

[0040] It should be noted that, in this embodiment, the power supply device 206 is con...

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Abstract

The invention provides a synchronous signal generator for cable partial discharge test, which includes a first RTC module and a first communication module arranged at the cable pressurization place, and also includes a second RTC module arranged at the partial discharge test point, The second communication module, the signal generation module and the DA conversion module; the first RTC module is connected to the first communication module, and the second RTC module, the second communication module, the signal generation module and the DA conversion module are connected in sequence; the first communication module is After the first RTC module and the second RTC module complete the time synchronization, the frequency and zero-degree phase time of the voltage applied to the cable pressurization place are sent to the second communication module; The square wave signal corresponding to the voltage; the DA conversion module converts the square wave signal into a sine wave signal. It can save manpower and time costs while ensuring the smooth progress of the partial discharge test.

Description

technical field [0001] The invention relates to the technical field of partial discharge testing, in particular to a synchronous signal generator for cable partial discharge testing. Background technique [0002] Partial discharge test has high sensitivity. For newly designed and manufactured high-voltage electrical equipment, the weak links in the insulation can be found in time through partial discharge measurement, so as to prevent errors in design and manufacturing processes and improper use of materials. It is a method to identify product insulation or equipment operation reliability. An important way to find equipment defects that cannot be found in the withstand voltage test. Partial discharge test is one of the important items in the current preventive test of power equipment. [0003] According to the location and mechanism of partial discharge, partial discharge in electrical equipment can be roughly divided into three types: (1) partial discharge inside the insu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
Inventor 唐琪李国伟罗容波李慧王俊波
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID