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An Evaluation System for Transformer Insulating Oil

A transformer insulating oil and evaluation system technology, applied in the direction of instruments, measuring devices, etc., can solve problems such as troublesome, aging judgment of transformer insulating oil, confusion of standard values, etc.

Inactive Publication Date: 2011-12-07
WUHU POWER SUPPLY COMPANY OF STATE GRID ANHUI ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current transformer insulating oil quality standard GB7595 only puts forward the quality standard requirements for each test item of transformer insulating oil in operation. The aging condition of transformer insulating oil cannot be judged from the results of a single test item. The test results can make a comprehensive evaluation of its status
GB7595 proposes various test standards for transformer insulating oil from 500kV and below for various voltage levels. The standard values ​​of some items vary with different voltage levels. In reference use, it is easy to confuse the standard values ​​of different voltage levels, resulting in unnecessary trouble

Method used

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  • An Evaluation System for Transformer Insulating Oil
  • An Evaluation System for Transformer Insulating Oil
  • An Evaluation System for Transformer Insulating Oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0128] An evaluation system for transformer insulating oil, comprising the following steps:

[0129] a) Detection process:

[0130] That is, according to the method of GB7595, the appearance and color of the oil, acid value, interfacial tension, breakdown voltage, moisture, dielectric loss factor, gas content in oil, and flash point are tested respectively;

[0131] b) Statistics process:

[0132] The quality of insulating oil with a voltage level of 500kV is divided into four states: excellent, qualified, abnormal, and serious. Excellent is 5 points, qualified is 3 points, abnormal is 2 points, and serious is 1 point; and according to the deterioration of insulating oil Depending on the degree of importance, the above 8 items are divided into 3 levels of weight: the test appearance and color subject to subjective influence are 1st level; whether the transformer insulating oil contains impurities is 2nd level, including micro water, breakdown voltage, The items that reflect ...

Embodiment 2

[0168] An evaluation system for transformer insulating oil, comprising the following steps:

[0169] a) Detection process:

[0170] That is, according to the method of GB7595, the appearance and color of the oil, acid value, interfacial tension, breakdown voltage, moisture, dielectric loss factor, gas content in oil, and flash point are tested respectively;

[0171] b) Statistics process:

[0172] The quality of insulating oil with a voltage level of 220kV is divided into four states: excellent, qualified, abnormal, and serious. Excellent is 5 points, qualified is 3 points, abnormal is 2 points, and serious is 1 point; and according to the deterioration of insulating oil Depending on the degree of importance, the above 8 items are divided into 3 levels of weight: the test appearance and color subject to subjective influence are 1st level; whether the transformer insulating oil contains impurities is 2nd level, including micro water, breakdown voltage, The items that reflect ...

Embodiment 3

[0205] An evaluation system for transformer insulating oil, comprising the following steps:

[0206] a) Detection process:

[0207] That is, according to the method of GB7595, the appearance and color of the oil, acid value, interfacial tension, breakdown voltage, moisture, dielectric loss factor, gas content in oil, and flash point are tested respectively;

[0208] b) Statistics process:

[0209] The quality of insulating oil with a voltage level of 110kV and below is divided into four states: excellent, qualified, abnormal, and serious. 5 points are excellent, 3 points are qualified, 2 points are abnormal, and 1 point is serious; and according to the insulation According to the importance of oil deterioration degree, the above 8 items are divided into 3 levels of weight: the test appearance and color subject to subjective influence are 1st level; whether there are impurities in the transformer insulating oil is 2nd level, including micro water, breakdown Voltage, and the i...

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Abstract

The invention discloses an evaluation system for transformer insulating oil. The system includes a detection process, a statistical process, and an evaluation process. Compared with the prior art, the present invention is based on the quality standard GB7595 of transformer insulating oil in the existing operation. In terms of classification, the classification method of transformer insulating oil in operation is proposed, and the state evaluation system of transformer insulating oil in operation is established, which can comprehensively detect and evaluate the state of transformer insulating oil in operation, and provide the rationality, Economical, laying a solid foundation for the realization of condition-based maintenance. Classified according to the voltage level, the order is clear, which reduces the possibility of quoting standard errors in the production process. At the same time, by writing the evaluation program, the test and evaluation of transformer insulating oil in operation can be carried out at a lower cost and less personnel input, saving manpower and material resources and improving maintenance efficiency.

Description

technical field [0001] The invention belongs to an evaluation system of transformer insulating oil. Background technique [0002] Transformer insulating oil plays the role of insulation, cooling and protection in the operation of transformers. As the years of transformer operation increase, the transformer insulating oil will undergo chemical reactions such as oxidation and cracking, that is, the oil quality will begin to deteriorate, and various acids and acidic substances will be produced in the oil. The final product of deep deterioration of oil quality is oil sludge, which damages the transformer insulation and seriously affects heat dissipation, resulting in bad consequences. Therefore, the quality of transformer insulating oil in operation directly affects the safe operation and service life of transformers. Strengthening the supervision and maintenance of oil quality and taking reasonable and effective anti-inferiority measures can prolong the service life of oil and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02
Inventor 张亚平杨业苏镇西祁炯宫改花葛云李涛
Owner WUHU POWER SUPPLY COMPANY OF STATE GRID ANHUI ELECTRIC POWER
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