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A signal denoising method for gis oscillation shock withstand voltage test

A technology of vibration shock and withstand voltage test, applied in the direction of testing dielectric strength, instruments, measuring devices, etc., can solve problems such as few researches, and achieve high reliability and practicability

Active Publication Date: 2019-04-30
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are not many studies on partial discharge detection and insulation evaluation under oscillating impulse voltage, and there are few related reports on denoising methods in complex electromagnetic environments.

Method used

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  • A signal denoising method for gis oscillation shock withstand voltage test
  • A signal denoising method for gis oscillation shock withstand voltage test
  • A signal denoising method for gis oscillation shock withstand voltage test

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Embodiment Construction

[0033] based on the following Figure 1 to Figure 4 , specifically explain the preferred embodiment of the present invention.

[0034] like figure 1 As shown, the present invention provides a signal detection system for GIS oscillation shock withstand voltage test, comprising:

[0035] Electrically connected to the oscillating impact high-voltage power supply 3 of the GIS test object 7;

[0036] The impact high voltage control unit 2 electrically connected to the oscillating impact high voltage power supply 3;

[0037] Electrically connect the oscillating impact high-voltage power supply 3 and the capacitive voltage divider 4 of the GIS test product 7;

[0038] Electrically connected to the current detection module 6 of the GIS test product 7;

[0039] The acquisition and storage device 5 electrically connected to the capacitive voltage divider 4 and the current detection module 6;

[0040] The main control display device 1 is electrically connected with the shock high vo...

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Abstract

The present invention provides a signal denoising method for a GIS vibration impact voltage-withstand test. A customized pulse extraction window is employed to extract individual pulse time domain waveform of partial discharge data and corresponding discharging moment, after a pulse waveform-time series is formed, a corresponding peak / time-impact voltage distribution graph is drawn, an equivalent time-frequency algorithm is employed to perform feature parameter extraction of all the pulse groups corresponding to the pulse waveform-time series to form a two-dimensional equivalent time-frequency distribution graph, and a fuzzy C mean value clustering algorithm is employed to perform rapid classification of the obtained pulse group based on the two-dimensional equivalent time-frequency distribution graph to separate a noise source from a discharge source so as to realize partial discharge pulse current signal denoising. The signal denoising method for a GIS vibration impact voltage-withstand test can effectively perform denoising processing of the partial discharge pulse signals under the vibration impact voltage, and has high reliability and practicability.

Description

technical field [0001] The invention relates to a signal denoising method for a GIS oscillating impact withstand voltage test, in particular to a method for denoising a partial discharge pulse current signal used for a GIS oscillating impact withstand voltage test. Background technique [0002] Gas-insulated metal fully-enclosed switchgear (GIS) is more and more widely used in power grids. With the large-scale construction of power grids, more and more power outages are caused by GIS insulation failures. In order to improve the reliability of GIS operation Relevant standards recommend on-site impulse voltage withstand test for GIS equipment. IEC60060-3 recommends the use of high-efficiency oscillatory impulse voltage as the voltage waveform of the on-site withstand voltage test. Partial discharge measurement is carried out at the same time as the impulse withstand voltage test, and the overall insulation strength and local insulation state of the GIS equipment can be obtain...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
CPCG01R31/1254
Inventor 郭磊查坚卿张勇郑佳赵华郭旭峰邱辉王一鸣
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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