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Power disturbance analyzer and power disturbance classification method based on improved S transform

A technology of perturbation analysis and classification method, applied in instrument, character and pattern recognition, data processing application, etc., can solve the problems of limited reliability, complicated calculation, long training time, etc.

Active Publication Date: 2016-12-21
国网新疆电力有限公司营销服务中心 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention provides a power disturbance analyzer and a classification method based on the improved S-transform, which overcomes the deficiencies of the prior art above, and can effectively solve the problems of large data volume, cumbersome calculation, difficulty in embedded implementation and classification of power disturbance signals in the prior art. The algorithm has the problems of long training time, limited reliability and poor convergence

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  • Power disturbance analyzer and power disturbance classification method based on improved S transform
  • Power disturbance analyzer and power disturbance classification method based on improved S transform
  • Power disturbance analyzer and power disturbance classification method based on improved S transform

Examples

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Embodiment 1

[0070] Embodiment 1: as attached figure 1 As shown, a power disturbance analyzer based on the improved S-transform is characterized in that it includes a power module, an analog-to-digital converter and a digital signal processor, and the output of the power module is connected to the input of the analog-to-digital converter and the The input end of the digital signal processor is electrically connected, the input end of the analog-to-digital converter is electrically connected to a signal conditioning circuit, the output end of the analog-to-digital converter is electrically connected to the input end of the digital signal processor, and the output ports of the digital signal processor are respectively It is electrically connected with a reset module, an emulation debugging interface, a synchronous dynamic random access memory and a FLASH memory. In the actual work process, the simulation debugging can use the JTAG interface to connect with the digital signal processor for si...

Embodiment 2

[0074] Embodiment 2: as figure 2 As shown, an S-transform-based electric energy disturbance classification method includes the following steps:

[0075] The first step is low-pass filtering: the signal of the circuit under test is input to the signal conditioning circuit for low-pass filter processing, and the resistance and capacitance values ​​of the analog low-pass filter and the analog-to-digital converter are determined according to the time-frequency resolution requirements of the signal under test The sampling rate and number of bits;

[0076] The second step, analog-to-digital conversion: the filtered voltage analog signal is converted into a digital signal by an analog-to-digital converter;

[0077] The third step is to improve the S-transform: send the converted digital signal into the digital signal processor, complete the construction of the discrete long-spherical sequence window in the digital signal processor and perform the improved S-transform. The frequenc...

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Abstract

The invention relates to the technical field of power disturbance signal processing, and discloses a power disturbance analyzer and a power disturbance classification method based on improved S transform. The power disturbance analyzer comprises a power module, an analog-to-digital converter, and a digital signal processor, wherein the output end of the power module is electrically connected with the input end of the analog-to-digital converter and the input end of the digital signal processor, the input end of the analog-to-digital converter is electrically connected with a signal conditioning circuit, and the output end of the analog-to-digital converter is electrically connected with the input end of the digital signal processor. The power disturbance classification method comprises the following steps: S1, low-pass filtering; S2, analog-to-digital conversion; S3, improved S transform; and S4, power disturbance classification based on DAG-SVMs. The power disturbance analyzer of the invention is reasonable in structure and layout. Key characteristic frequency points are extracted, and only DPSSW windowing operation is performed on the characteristic frequency points. There is less amount of calculation, the efficiency is high, and the practicability is strong. Classification is quick, and there is no area which is wrongly classified or denied. The power disturbance analyzer and the power disturbance classification method are suitable for embedded implementation.

Description

technical field [0001] The invention relates to the technical field of power system electric energy disturbance signal processing, and relates to an electric energy disturbance analyzer and classification method based on improved S transform. Background technique [0002] Electric energy is a standard industrial frequency sinusoidal voltage with stable amplitude and frequency, but in the actual transmission process, the electric energy is affected by various factors, and the electric energy reaching the user will deviate from the sinusoidal waveform and be distorted, resulting in the problem of electric energy disturbance. In recent years, the direct harm caused by electric energy disturbance to the power grid and power distribution system and the loss to human production and life have become more and more serious. In order to ensure the stable operation of the power system, it must be controlled and processed. At present, some commonly used electric energy disturbance sign...

Claims

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Application Information

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IPC IPC(8): G06K9/62G06Q50/06
CPCG06Q50/06G06F18/2411
Inventor 李宁童光华刘国亮滕召胜李发亮张建文杨胜东段志尚梁来明
Owner 国网新疆电力有限公司营销服务中心