A non-destructive capture method of nanosecond narrow pulse sequence of partial discharge

Abstract

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 in particular relates to a method for non-destructive capture of partial discharge nanosecond-level narrow pulse sequences. Background technique [0002] Partial discharge refers to the discharge phenomenon in which a fixed discharge channel is not formed in the discharge area when the field strength generated by the applied voltage in the electrical equipment is sufficient to cause discharge in the insulating part of the area. Every partial discharge will have some impact on the insulating medium. Slight partial discharge has little effect on the insulation of power equipment, and the insulation strength will drop slowly; while strong partial discharge will make the insulation strength drop quickly, which will lead 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. Whe...

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Problems solved by technology

[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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