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Partial discharge simulation test system and method based on oscillatory waves

A technology of partial discharge and simulation testing, which is applied in the direction of testing dielectric strength, measuring electricity, measuring devices, etc. It can solve the problems of waveforms that are difficult to identify, unfavorable to grasp, and cannot withstand high voltage, etc., to achieve the effect of avoiding pollution flashover

Pending Publication Date: 2020-03-24
SHANDONG KEHUI POWER AUTOMATION
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Problems solved by technology

[0003] However, due to the relatively short period of introduction of oscillatory wave PD into China, and the wave form of oscillatory wave PD testing is more difficult to identify than cable fault testing, and the current partial discharge simulation system on the market can only simulate different classic partial discharge defects. Atlas, cannot withstand high voltage, and in the actual partial discharge test of the oscillatory wave, high voltage needs to be applied to the cable, so the analog system of the prior art is not conducive to the technician's mastery of the partial discharge test technology of the oscillatory wave

Method used

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  • Partial discharge simulation test system and method based on oscillatory waves
  • Partial discharge simulation test system and method based on oscillatory waves
  • Partial discharge simulation test system and method based on oscillatory waves

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Experimental program
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Effect test

Embodiment 1

[0049] Such as figure 1 As shown, a partial discharge simulation test system based on oscillating waves includes a vertically placed rectangular housing 1, a cable winding part 4 is arranged at the center of the bottom of the inner cavity of the housing 1, and the cable winding part 4 is wound There is a cable 5, and the cable 5 is a section of cable without partial discharge defects. The two ends of the cable 5 connector are drawn out as cable connectors 6 from the opposite sides of the shell 1 bottom respectively.

[0050] In this embodiment, any two positions in the cable 5 are set as test points, and the cable inner core and sheath (ground terminal) at the test points are drawn out respectively through wires and connected to the test joint mechanism 3, and the test joint The mechanism 3 is fixed on the side of the housing 1 through the joint fixing plate 2 . On the side of the housing 1 , there are two test joint mechanisms 3 arranged from top to bottom, which are respec...

Embodiment 2

[0081] The difference between this embodiment and embodiment 1 is: as Figure 7 As shown, in this embodiment, there is only one test point in the cable 5, so a test connector mechanism 3 is provided correspondingly, and the cable inner core and sheath (ground terminal) at the test point are also led out through wires And connected to the test joint mechanism 3, the test joint mechanism 3 is fixed on the side of the shell 1 through the joint fixing plate 2.

Embodiment 3

[0083] The difference between this embodiment and embodiment 1 is: as Figure 8As shown, a discharge tip 22 is arranged in the first insulator 19 in the partial discharge test module 15 of this embodiment, and one end of the discharge tip 22 is connected to the corresponding discharge electrode 18, and its tip enters the discharge after passing through the first insulator 19. within the gap 20. The test of tip discharge can be realized through the partial discharge test module 15 of this embodiment.

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Abstract

The invention discloses a partial discharge simulation test system and method based on oscillatory waves, and belongs to the technical field of partial discharge test. The system comprises a cable (5), a test point is arranged in the cable (5), and an inner core and a protective layer at the test point are led out of a test connector mechanism (3) separately. The test connector mechanism (3) is connected with a test plug mechanism in an inserted mode, and the oscillatory wave signals are discharged in a partial discharge test module (15) in the test plug mechanism. The method further comprisesthe following steps of 1001, calculating an initial voltage; 1002, inserting the test plug mechanism with the test joint mechanism (3); 1003, connecting a cable joint (6) with an oscillatory wave host; 1004, outputting an oscillatory wave signal; and 1005, observing the waveform. According to the partial discharge simulation test system and method based on oscillatory waves, the actual oscillatory wave signal is input into the cable, so that the test waveform can be identified conveniently, and technicians can master the oscillatory wave partial discharge test technology conveniently, and theoscillatory wave partial discharge test is closer to the actual test.

Description

technical field [0001] A partial discharge simulation test system and test method based on oscillatory waves belong to the technical field of partial discharge tests. Background technique [0002] The phenomenon of partial discharge mainly refers to the phenomenon that only a local area of ​​the insulator of high-voltage electrical equipment is discharged. According to the statistics of the power grid, partial discharge is an important cause of the final insulation breakdown of high-voltage electrical equipment, and it is also an important sign of insulation degradation. With the continuous advancement of technology, in order to ensure the reliability of power supply, the State Grid Corporation of China has also gradually advanced the planned maintenance of cables to condition-based maintenance. For partial discharge defects, timely elimination of defects can ensure the normal operation of the cable, so the State Grid Corporation of China has also formulated corresponding re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1227
Inventor 宫士营单超徐丙垠荣光蒋凯杰宫照辉许圣强李鸣镝马法龙刘领校
Owner SHANDONG KEHUI POWER AUTOMATION
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