Novel power signal compressed sensing method based on signal singularity detection improvement

A compressed sensing, power signal technology, applied in electrical components, special data processing applications, code conversion, etc., can solve complex problems, achieve the effect of easy implementation, improve processing efficiency, and improve reconstruction accuracy

Active Publication Date: 2021-10-26
STATE GRID CORP OF CHINA +2
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  • Novel power signal compressed sensing method based on signal singularity detection improvement
  • Novel power signal compressed sensing method based on signal singularity detection improvement
  • Novel power signal compressed sensing method based on signal singularity detection improvement

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[0058] The present invention will be further described below using the accompanying drawings and examples.

[0059] see Figure 1-6 And table 1, embodiment 1, present embodiment a kind of new method based on signal singularity detection improved power signal compressive sensing comprises the following steps:

[0060] 1) Power transmission signal denoising based on the combination of wavelet modulus maxima and compressed sensing, see Figure 1-4 ,

[0061] ① Through the simulation analysis of the power line transmission model of the three-phase circuit, the types and characteristics of the noise contained in the power line channel are determined:

[0062] a) Analysis of power line transmission model

[0063]

[0064] Among them, u a , u b , u c are the voltages of phase A, phase B and phase C of the three-phase circuit, ω is the angular frequency, α is the phase angle, η is the power line channel noise, U m is 220V phase voltage, t is time;

[0065] b) Power line cha...

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Abstract

The invention relates to a novel power signal compressed sensing method based on signal singularity detection improvement. The method is characterized by comprising the following steps of: 1) de-noising power transmission signals based on combination of the maximum value of a wavelet modulus and compressed sensing; 2) designing a compressed sensing measurement matrix in combination with the characteristics of the power transmission signals; and 3) carrying out compressed sensing and reconstruction on the power transmission signals based on the signal singularity detection improvement. According to the method, in a maximum domain of the wavelet modulus, the positive and negative nature of a Lipschitz index is taken as a judgment basis to remove the modulus maximum of noise contained in the power transmission signals, a Chebyshev sparse cycle measurement matrix is designed to carry out compressed sampling on the denoised modulus maximum, and finally, the power transmission signals are reconstructed through a reconstruction algorithm. Thus, the accuracy and efficiency of power line communication information transmission are improved, and the engineering application value of a PLC is enhanced.

Description

technical field [0001] The invention relates to power signal transmission, in particular to the field of power signal transmission compressed sensing, and is a novel power signal transmission compressed sensing method based on signal singularity detection improvement. Background technique [0002] The stability of information transmission in wireless communication has always been the focus of researchers. Therefore, transmission lines with wide distribution, firm structure, and low cost have attracted the attention of researchers, and more reliable power line communication (Power line communication, PLC) has emerged and has been widely used in smart grids, home automation, office automation, and intelligent transportation. and other fields, with huge development potential and economic value. With the continuous improvement of related communication facilities, the information transmission rate of PLC has increased explosively. However, the harsh environment of PLC channel ha...

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Application Information

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IPC IPC(8): H03M7/30G06F30/20G06F119/10
CPCH03M7/30G06F30/20G06F2119/10
Inventor 孙铭泽夏智翼刘多斌张先觉李芳菲李秉谦高甜康士祥邢砾云金基良
Owner STATE GRID CORP OF CHINA
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