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Method and device for diagnosing hidden dangers of transformer faults

A transformer fault diagnosis method technology, applied in the electric power field, can solve the problem of low accuracy of the vibration signal analysis method, and achieve the effect of accurate diagnosis results

Active Publication Date: 2020-11-03
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a transformer health status diagnosis method and device for the problem of low accuracy of the traditional vibration signal analysis method

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  • Method and device for diagnosing hidden dangers of transformer faults
  • Method and device for diagnosing hidden dangers of transformer faults
  • Method and device for diagnosing hidden dangers of transformer faults

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Embodiment Construction

[0048] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0049] An embodiment of the present invention provides a method for diagnosing potential transformer faults, such as figure 1 shown, including steps:

[0050] Step S1, obtaining the vibration information entropy of the transformer vibration signal and the output current value of the transformer;

[0051] Step S2, correcting the vibration information entropy according to the output current value of the transformer and the rated output current value of the transformer;

[0052] Step S3, according to the corrected vibration information entropy, diagnose the fault and hidden...

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Abstract

The invention provides a transformer fault hidden trouble diagnosis method and device. The above transformer fault hidden trouble diagnosis method comprises steps: the vibration information entropy oftransformer vibration signals and the output current value of a transformer are obtained; according to the output current value of the transformer and the rated output current value of the transformer, the vibration information entropy is corrected; and according to the corrected vibration information entropy, fault diagnosis and fault hidden trouble diagnosis are carried out on the transformer.Thus, in consideration of influences on the output current value of the transformer by different loads, the vibration information entropy is corrected, the corrected vibration information entropy canexpress the current health state of the transformer more accurately, and the diagnosis result is more accurate.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method and device for diagnosing hidden dangers of transformer faults. Background technique [0002] Transformer is an important equipment in the power system. If the transformer fails, it may cause a large-scale power outage and bring a lot of economic losses. Therefore, it is necessary to detect transformers with faults or hidden dangers as soon as possible, repair the faults and hidden dangers in time, and ensure the stable operation of the power system. [0003] Winding faults are the most common type of faults in transformers. Winding faults are mainly due to the irreversible changes in the mechanical structure of the windings under the action of electromagnetic force or mechanical force. Common ones include winding looseness, warping, bulging and misalignment. Wait. Since winding faults will lead to changes in many characteristic parameters of the transformer, t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00G01H17/00
CPCG01H17/00G01R31/00
Inventor 顾春晖覃煜王勇张行
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD