Method and device for constructing pulse current waveform rising edge time width-phase spectrum
A current waveform and phase spectrogram technology, applied in the field of partial discharge information processing, can solve the problems of indistinguishable amplitude, unable to handle multiple partial discharge sources or random pulse interference sources, insufficient to display useful information, etc. Effects of Waveform Information
Active Publication Date: 2017-05-03
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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Problems solved by technology
The pulse current time-domain waveforms formed by different discharge sources or signal interference sources on the detection system loop are quite different, but they cannot be distinguished only by the amplitude
That is to say, the widely used traditional PRPD spectrum is not enough to show more useful information, nor can it be used to deal with the working conditions of multiple partial discharge sources or random pulse interference sources
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[0039] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.
[0040] The traditional phase-resolved partial discharge (PRPD) spectrum is not enough to show more useful information, nor can it be used to deal with multiple partial discharge sources or random pulse interference sources. The present invention tries to start from the practical application, overcome the deficiency that the existing PRPD spectrogram loses more information, and proposes a method for constructing the rising edge time width-phase spectrogram of the partial discharge pulse current waveform. Such as figure 1 As shown, the construction method includes:
[0041] In step 10...
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The invention relates to a method and a device for constructing a partial discharge pulse current waveform rising edge time width-phase spectrum. The constructing method comprises steps: acquisition parameters are set; based on the acquisition parameters and an ultra wideband detection technology, a partial discharge pulse current waveform-time sequence is acquired; a rising edge time width is extracted from the partial discharge pulse current waveform, and a rising edge time width-time sequence is acquired; and the rising edge time width-time sequence is converted to a rising edge time width-phase sequence, and display of a rising edge time width-phase sequence spectrum is carried out. Compared with the prior art, the method and the device have the advantages of simply and practically acquiring richer partial discharge information.
Description
technical field [0001] The invention relates to partial discharge information processing technology, in particular to a method and device for constructing pulse current waveform rising edge duration-phase spectrum. Background technique [0002] When performing partial discharge detection on electrical equipment insulation (oil-paper insulation, gas insulation, etc.), it is assumed that under the ideal noise rejection technology, the detection based on the peak value of partial discharge pulse-time (phase) sequence is more effective when there are multiple partial discharge sources (including Two), the partial discharge data acquired by the system will be a random aliased peak-phase sequence (PRPD). The partial discharge source existing inside the electrical equipment insulation is unknown, but under the stable working conditions of the partial discharge source, the transmission path formed by the detection system is determined. The pulse current time-domain waveforms formed...
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IPC IPC(8): G01R31/12
CPCG01R31/1227
Inventor 徐鹏高凯陆启宇李腾飞袁鹏
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO