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Transformer fault diagnosis method based on Duval Pentagons fault BPA function

A transformer fault diagnosis method technology, applied in the field of power equipment status monitoring and fault diagnosis, can solve the problem that the diagnosis result of DuvalPentagons method cannot be directly applied to information fusion, etc., and achieve the effect of comprehensive and reliable diagnosis results

Pending Publication Date: 2021-06-11
SOUTHWEST UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem that the diagnosis result of the Duval Pentagons method cannot be directly applied to information fusion, the present invention proposes a transformer fault diagnosis method based on the Duval Pentagons fault BPA function

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  • Transformer fault diagnosis method based on Duval Pentagons fault BPA function
  • Transformer fault diagnosis method based on Duval Pentagons fault BPA function
  • Transformer fault diagnosis method based on Duval Pentagons fault BPA function

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Embodiment Construction

[0039] Below in conjunction with accompanying drawing, the present invention is done an example analysis:

[0040] The sample data of dissolved gas in a transformer oil is (unit: μL / L): H 2 (151.4), CH 4 (96.2), C 2 h 6 (209.7), C 2 h 4 (18.3), C 2 h 2 (330.5). Calculate the BPA value of each fault type of the sample data to be tested according to the method described in this article. The process is as follows:

[0041] Comparing the data of the sample to be tested with the caution value of the dissolved gas content in the oil, it can be seen that the contents of hydrogen, acetylene and total hydrocarbons all exceed the caution value, and it is considered that there is a fault inside the transformer equipment.

[0042] Select the Duval Pentagon1 method suitable for judging the six basic fault types of T1, T2, T3, PD, D1 and D2, and determine the identification framework as .

[0043] The Duval Pentagon1 fault characteristic area is discretized, and the BPA value of ...

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Abstract

The invention relates to a transformer fault diagnosis method based on a Duval Pentagons fault BPA function. The method comprises the following steps: firstly, discretizing a fault feature region defined by a Duval Pentagons method according to geometric features of the fault feature region according to a finite element theory; secondly, constructing a transformer fault BPA function of Duval Pentagons by applying a three-node triangular interpolation method on the basis of discretization of the fault feature region; and finally, giving a fault diagnosis result of the sample transformer to be detected according to a calculation result of the transformer fault BPA function of the Duval Pentagons. The diagnosis result of the method is consistent with the diagnosis result of the Duval Pentagons method, and the probability of occurrence of various fault types corresponding to the recognition framework can be quantitatively given; and a reliable basis is provided for operation and maintenance personnel to comprehensively and accurately judge the operation condition of the transformer.

Description

technical field [0001] The invention relates to the technical field of state monitoring and fault diagnosis of electric equipment, in particular to a transformer fault diagnosis method based on DuvalPentagons fault BPA function. Background technique [0002] Oil-immersed transformers are key pivotal equipment in power systems. Timely and accurate diagnosis and detection of potential faults in oil-immersed transformers is particularly important for ensuring safe and reliable operation of power systems. Dissolved gas analysis (DGA) is the most widely used and effective technology for fault diagnosis of oil-immersed transformers, which can timely and accurately diagnose early faults inside oil-immersed transformers. [0003] Due to the complex mapping relationship between the dissolved gas content and content ratio in transformer oil and faults, and judging from the research methods of many current research literatures, the judgment results of different methods will diverge whe...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F30/27G06K9/62G06N5/04
CPCG06F30/23G06F30/27G06N5/04G06F18/2415G06F18/25
Inventor 唐超张丞鸣胡东谢菊芳郭丽余松张庆峰蔡丽洪方云
Owner SOUTHWEST UNIVERSITY