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Electricity travelling wave signal reconstructing method based on compressed sensing

A technology of compressed sensing and signal reconstruction, applied in electrical components, code conversion, etc., can solve the problems of large amount of calculation, long time consumption, large storage space, etc., to reduce sampling frequency, improve calculation speed, save sampling and reconstruction the effect of time

Active Publication Date: 2015-04-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on the above-mentioned prior art, in order to solve the current problems such as large amount of data collection of electric power traveling wave signals, large storage space occupied, large amount of calculation, long time consumption, and unfavorable for fast and accurate analysis of electric power traveling wave signals, the present invention provides A reconstruction method of power traveling wave signal based on compressive sensing

Method used

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  • Electricity travelling wave signal reconstructing method based on compressed sensing
  • Electricity travelling wave signal reconstructing method based on compressed sensing
  • Electricity travelling wave signal reconstructing method based on compressed sensing

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Embodiment 1

[0044] Embodiment 1: as Figure 1-13 As shown in the figure, a reconstruction method of electric traveling wave signal based on compressed sensing, first uses the traveling wave detection device to obtain the original traveling wave signal and obtains its sparse representation coefficient in a certain transform domain, and then forms Dictionary matrix, and the measurement matrix is ​​linearly projected on the original traveling wave signal to obtain the observation vector, and the original traveling wave signal is reconstructed by using the orthogonal matching pursuit method to obtain the reconstructed traveling wave signal, and finally the reconstructed traveling wave signal The wave signal is verified.

[0045] The concrete steps of described method are as follows:

[0046] Step1. Traveling wave signal acquisition:

[0047] Use the traveling wave detection device to collect high-frequency fault traveling waves, and use the phase-mode transformation and wavelet transform mo...

Embodiment 2

[0069] Embodiment 2: as Figure 1-13 As shown in the figure, a reconstruction method of electric traveling wave signal based on compressed sensing, first uses the traveling wave detection device to obtain the original traveling wave signal and obtains its sparse representation coefficient in a certain transform domain, and then forms Dictionary matrix, and the measurement matrix is ​​linearly projected on the original traveling wave signal to obtain the observation vector, and the original traveling wave signal is reconstructed by using the orthogonal matching pursuit method to obtain the reconstructed traveling wave signal, and finally the reconstructed traveling wave signal The wave signal is verified.

[0070] The concrete steps of described method are as follows:

[0071] Step1. Traveling wave signal acquisition:

[0072] In practice, the fault traveling wave data can be collected by the traveling wave detection device, and the data segment containing the fault traveling...

Embodiment 3

[0092] Embodiment 3: as Figure 1-13 As shown in the figure, a reconstruction method of electric traveling wave signal based on compressed sensing, first uses the traveling wave detection device to obtain the original traveling wave signal and obtains its sparse representation coefficient in a certain transform domain, and then forms Dictionary matrix, and the measurement matrix is ​​linearly projected on the original traveling wave signal to obtain the observation vector, and the original traveling wave signal is reconstructed by using the orthogonal matching pursuit method to obtain the reconstructed traveling wave signal, and finally the reconstructed traveling wave signal The wave signal is verified.

[0093] The concrete steps of described method are as follows:

[0094] Step1. Traveling wave signal acquisition:

[0095] Use the traveling wave detection device to collect high-frequency fault traveling waves, and use the phase-mode transformation and wavelet transform mo...

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Abstract

The invention relates to an electricity travelling wave signal reconstructing method based on compressed sensing, and belongs to the field of the electricity travelling wave process. The method comprises: first, a travelling wave detecting device is used to obtain an original travelling wave signal and determine a sparse representing coefficient in a certain transforming area; and then a lexicon matrix is formed through a selected measurement matrix, the linear projection is carried out on the original travelling wave signal by the measurement matrix to obtain an observation vector, the orthogonal matching pursuit method is used to reconstruct the original travelling wave signal, and a reconstructed travelling wave signal is obtained; finally, the verification is carried out on the reconstructed travelling wave signal. Compared with the traditional electricity travelling wave signal reconstructing method, using the sparsity of the travelling wave signal and the compressed sensing theory, the reconstruction is carried out on the electricity travelling wave signal, the sampling frequency is greatly lowered, the calculating speed is improved, and the sampling and reconstructing time is saved.

Description

technical field [0001] The invention relates to a method for reconstructing a power traveling wave signal based on compressed sensing, and belongs to the field of power traveling wave signal processing. Background technique [0002] Compressive Sensing (CS) is a new signal proposed by Donoho (academician of the American Academy of Sciences), Candès (Ridgelet, founder of Curvelet), Tao (Tao Zhexuan, winner of the Fields Medal in 2006) and others in 2004 A theoretical framework for acquisition, description, and processing. The theory points out that: under the condition of ensuring no loss of information, the signal can be sampled at a rate much lower than that required by the Nyquist sampling theorem, and the sampling of the signal can be converted into the sampling of the information, and the original traveling wave can still be accurately restored. signal, so, compressed sensing is also known as compressed sampling or sparse sampling. The establishment and development of ...

Claims

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Application Information

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IPC IPC(8): H03M7/30
Inventor 叶波孙科杨春曦李鸣陈飞罗琎
Owner KUNMING UNIV OF SCI & TECH
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