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Method for acquiring discrete state parameters of power transformer

A technology for power transformers and power acquisition, applied in the direction of measuring electrical variables, instruments, measuring electricity, etc., can solve the problems of power transformer multi-source data mining difficulties, power transformer state parameter identification difficulties, etc., to achieve wide fault coverage and broad market application Prospects, the effect of improving detection efficiency

Active Publication Date: 2017-05-24
CHINA ELECTRIC POWER RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for discrete state parameters of power transformers, which solves the problems of difficult identification of power transformer state parameters and difficult multi-source data mining of power transformers in the prior art

Method used

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  • Method for acquiring discrete state parameters of power transformer
  • Method for acquiring discrete state parameters of power transformer
  • Method for acquiring discrete state parameters of power transformer

Examples

Experimental program
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Effect test

Embodiment 1

[0039] See attached figure 1 , The equipment involved in this embodiment includes a power transformer system under test, a gas detection device, a partial discharge detector, a winding deformation detector, an infrared temperature imager, a mechanical vibration detector, a transformer noise detector, and a computer.

[0040] The working process of this embodiment is as follows:

[0041] Obtain the type and content of dissolved gas in the tested power transformer oil through the gas detection equipment, and send the detection results to the computer. Dissolved gases including hydrogen H 2 , methane CH 4 , ethane C 2 h 6 , Vinyl C 2 h 4 and acetylene C 2 h 2 , where methane, ethane, ethylene and acetylene are collectively referred to as total hydrocarbons. Setting the preset threshold in the computer: the safety limit value of power transformer gas in electrical engineering technology is used as the preset threshold. See attached figure 2 , the preset threshold value...

Embodiment 2

[0051] See attached figure 1 , The equipment involved in this embodiment includes a power transformer system under test, a gas detection device, a partial discharge detector, a winding deformation detector, an infrared temperature imager, a mechanical vibration detector, a transformer noise detector, and a computer.

[0052] The working process of this embodiment is as follows:

[0053] Obtain the type and content of dissolved gas in the tested power transformer oil through the gas detection equipment, and send the detection results to the computer. Dissolved gases including hydrogen H 2 , methane CH 4 , ethane C 2 h 6 , Vinyl C 2 h 4 and acetylene C 2 h 2 , where methane, ethane, ethylene and acetylene are collectively referred to as total hydrocarbons. The steps to set the preset threshold are as follows:

[0054] Collect power transformer failure cases related to the dissolved gas, and establish a failure data collection through a computer;

[0055] According to ...

Embodiment 3

[0065] See attached figure 1 , The equipment involved in this embodiment includes a power transformer system under test, a gas detection device, a partial discharge detector, a winding deformation detector, an infrared temperature imager, a mechanical vibration detector, a transformer noise detector, and a computer.

[0066] The working process of this embodiment is as follows:

[0067] Obtain the type and content of dissolved gas in the tested power transformer oil through the gas detection equipment, and send the detection results to the computer. The steps to determine the dissolved gas are as follows:

[0068] Collect power transformer failure cases related to the dissolved gas, and establish a failure data collection through a computer;

[0069] For each fault type, the minimum support threshold is set based on human experience, and the frequency statistics of different characteristic gases are carried out to obtain all high-frequency characteristic gases as dissolved g...

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Abstract

The invention discloses a method for acquiring discrete state parameters of a power transformer, which solves problems of difficult power transformer state parameter recognition and difficult power transformer multi-source data mining. According to the invention, a discrete gas state parameter is acquired by adopting an improved equal width method according to the type and the content of dissolved gases in tested power transformer oil; a discrete partial discharge state parameter is acquired by adopting an information entropy decision tree method according to a discharge capacity statistical parameter, a discharge phase statistical parameter and a number of discharge statistical parameter; a discrete winding state parameter is acquired by adopting a binning method according to winding deformation and short-circuit current; and a discrete mechanical state parameter is acquired by adopting a chi-square test method according to the transformer temperature, vibration and noises. The method disclosed by the invention is applicable to the fields of power equipment detection and data mining, has the characteristics o f accurate data, high work efficiency, wide fault coverage, easy computer processing and the like, and has high economic values and broad market application prospects.

Description

technical field [0001] The invention relates to a method for obtaining discrete state parameters of power equipment, in particular to a method for obtaining discrete state parameters of power transformers, belonging to the field of power system detection. Background technique [0002] The power system provides a strong energy backing for the sustainable development of the national economy, and the reliability of electrical equipment as a component of the power system is the guarantee for the safe operation of the power grid. With the change and development of power load, the original power transmission and transformation equipment is limited by the technical conditions such as the thermal stability limit of the current carrying capacity, and the transmission capacity is greatly reduced. In the case of peak power consumption, maintenance or failure, the lack of intercommunication capacity of the entire transmission system will result in a limited load, resulting in a serious ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 王健一董明李金忠张书琦程涣超高飞孙建涛刘雪丽赵志刚汤浩吴超郭锐遇心如徐征宇贾鹏飞
Owner CHINA ELECTRIC POWER RES INST
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