Method for lossless capturing of partial discharge nanosecond-level narrow pulse sequence
A partial discharge, nanosecond technology, applied in the direction of testing dielectric strength, etc., can solve the problem of inability to automatically and non-destructively collect partial discharge signals, avoid detection omission or signal distortion, reduce data processing, and improve work efficiency.
Active Publication Date: 2018-10-09
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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[0004] In order to solve the above problems, the present invention proposes a method for non-destructive capture of partial discharge nanosecond-level narrow pulse sequences, realizes the capture of nanosecond-level narrow pulses, and solves the current technical problem that the partial discharge signal cannot be automatically and non-destructively collected
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[0025] The technical scheme of the present invention will be further described below according to the drawings and in conjunction with the embodiments.
[0026] The present invention adopts the following technical scheme, a method for nondestructive capturing of partial discharge nanosecond narrow pulse sequence, figure 1 It is a flowchart of the present invention, and the specific steps are as follows:
[0027] The present invention adopts the following technical scheme, a method for nondestructive capture of partial discharge nanosecond narrow pulse sequence, the specific steps are as follows:
[0028] 1) Design a joint trigger strategy for signal capture by high-speed acquisition devices;
[0029] 2) Use high-speed acquisition equipment to continuously sample the part of the signal that meets the joint trigger strategy, and intercept nanosecond-level narrow pulses from the continuously sampled signal to form a nanosecond-level narrow pulse sequence;
[0030] 3) Analyze the nanosecond...
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The invention discloses a method for the lossless capturing of a partial discharge nanosecond-level narrow pulse sequence, and the method comprises the steps: designing a combined triggering strategyof a high-speed collection device for signal capturing; carrying out the continuous sampling of a part, meeting with the combined triggering strategy, of a signal through the high-speed collection device, and extracting nanosecond-level narrow pulses from the continuously sampled signals to form the nanosecond-level narrow pulse sequence; analyzing the nanosecond-level narrow pulse sequence, and calculating the pulse width and the pulse interval; and configuring a quick storage mode and parameters of a collection card according to the pulse width and the pulse interval of the nanosecond-levelnarrow pulse sequence. The method achieves the capturing of the nanosecond-level narrow pulse sequence, and solves a technical problem that the automatic lossless collection of a partial discharge signal cannot be achieved in the prior art. The method reduces the data processing burden of the device, and improves the work efficiency. The method avoids the detection leakage or signal distortion, and improves the accuracy in judging a fault type.
Description
Technical field [0001] The invention belongs to the field of fault detection, and specifically relates to a method for nondestructive capturing of a partial discharge nanosecond narrow pulse sequence. Background technique [0002] Partial discharge refers to the field strength generated in electrical equipment when an external voltage is applied, which is sufficient to cause a discharge in the insulated area, but a fixed discharge channel is not formed in the discharge area. Every partial discharge will have some influence on the insulating medium. A slight partial discharge has less influence on the insulation of power equipment, and the insulation strength decreases slowly; while a strong partial discharge will cause the insulation strength to drop quickly, which leads to high-voltage power equipment An important factor in insulation damage. Therefore, it is necessary to monitor the partial discharge phenomenon of the equipment in operation. When the partial discharge exceeds ...
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IPC IPC(8): G01R31/12
CPCG01R31/12
Inventor 贾勇勇杨景刚高山陈少波刘媛李玉杰腾云宋思齐李洪涛刘通王静君赵科陶加贵
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST