Processing method of running state signal of arrester

A signal processing and operating state technology, applied in the field of power system signal processing and lightning arrester operating state signal processing, can solve problems such as inability to accurately locate time, failure to consider fence effect and spectrum leakage signal non-stationarity error, difficult conclusions, etc. Achieve the effect of improving effectiveness and reliability, realizing non-stationary processing, and reducing noise interference

Active Publication Date: 2016-05-04
SUQIAN POWER SUPPLY COMPANY OF JIANGSU PROVINCE POWER +4
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Problems solved by technology

The existing resistive fundamental wave current method mainly separates the fundamental wave value of the resistive current from the total leakage current through harmonic analysis technology, which gives a rough judgment conclusion based on the change of the current from the perspective of the time domain, and fails to consider Due to the fence effect and spectrum leakage caused by the asynchronous signal acquisition and the error caused by the non-stationarity of the si

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  • Processing method of running state signal of arrester
  • Processing method of running state signal of arrester
  • Processing method of running state signal of arrester

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[0043] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, detailed descriptions of known functions and designs may obscure the subject matter of the present invention, and such descriptions will be omitted here.

[0044] figure 1 It is the overall flow chart of the invented algorithm. Due to the influence of external electromagnetic interference and other factors, the high-frequency component of the measured value will often be enhanced. First, filter the sampled data, and then perform Fourier transformation to convert the time-domain signal Transformed to the time domain for analysis, due to the synchronization difference of the sampled data, there may be fence effects and spectrum leakage. Therefore, the present invention adds a Hanning window correction link. The signal obtained after this step is not intuitive and the collected signal is non-stationary. There is sti...

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Abstract

The present invention provides a processing method of a running state signal of an arrester, relates to the power system signal processing technology, and especially relates to the signal processing technology based on the running state on-line monitoring of a transformer substation arrester. On the basis of signal processing algorithms of filtering, Fast Fourier Transform, Hilbert-Huang Transform and hanning window correction, the processing method provided by the invention comprises numerical filter, Fourier Transform, hanning window correction and Hilbert-Huang Transform. Through analysis of on-line monitoring data of arrester running state, the validity and the visualizability of the arrest running state data analysis result are improved, and a good analysis means is provided for corrective maintenance and on-line monitoring of the arrester.

Description

technical field [0001] The invention relates to a signal processing method for the operation state of a lightning arrester, which relates to the signal processing technology of a power system, in particular to the signal processing technology based on the online monitoring of the operation state of the lightning arrester in a substation. Background technique [0002] Whether the arrester in the substation works normally or not seriously threatens the safe and stable operation of the substation, thus affecting the safety level of the entire system. With the continuous development of smart grids, online monitoring of substation operating devices has become an important construction content of smart substations. In this process, it becomes a necessary means to carry out signal processing on the monitoring information of the operating state of the arrester and obtain accurate results. [0003] So far, the judgment of the operation status of the substation lightning arrester mai...

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Application Information

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IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 刘群英蒋浩王洪寅孟劲松田贵云周聪泉王洪海
Owner SUQIAN POWER SUPPLY COMPANY OF JIANGSU PROVINCE POWER
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