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Oil filtering method for natural ester insulating oil transformer

A technology for transformers and insulating oil, applied in the field of transformers, can solve problems such as low oil filtration efficiency and poor oil filtration effect, and achieve the effects of improving filtration efficiency, improving the quality of insulating oil, and improving the overall oil quality.

Pending Publication Date: 2022-02-25
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Description
  • Claims
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Problems solved by technology

[0005] In order to make up for the deficiencies of the prior art and solve the problems that the existing oil filtering method has poor oil filtering effect and low oil filtering efficiency when dealing with natural ester insulating oil, the present invention proposes a method for natural ester insulating oil transformers oil filter method

Method used

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  • Oil filtering method for natural ester insulating oil transformer
  • Oil filtering method for natural ester insulating oil transformer
  • Oil filtering method for natural ester insulating oil transformer

Examples

Experimental program
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Effect test

Embodiment 1

[0031]see Figure 1-5 Shown, a kind of oil filtering method that is used for natural ester insulating oil transformer, this method comprises the following steps:

[0032] S1: Take oil samples and analyze the natural ester insulating oil injected into transformer 1, judge the degree of deterioration of the natural ester insulating oil according to the test results, and vacuum the oil filter in the vacuum oil filter system of transformer 1 according to the degree of oil deterioration 2 to adjust the heating temperature and flow rate;

[0033] S2: Open valve 1 7 and valve 2 9, start vacuum oil filter 2, vacuumize pipeline 1 4, pipeline 2 5 and pipeline 3 6, then open valve 3 10 and valve 4 8 to transformer 1 The natural ester insulating oil is filtered, and the vacuum oil filter 2 is used for preliminary filtration, and then the pre-filtered insulating oil flows into the filter device 3 to further reduce the dielectric loss, acid value and other indicators of the insulating oil;...

Embodiment 2

[0044] see Image 6 As shown in Comparative Example 1, as another embodiment of the present invention, a deflector 38 is affixed to the inner side wall of the bottom of the filter bucket 17; during operation, the setting of the deflector 38 has better guiding function, so that the insulating oil at the bottom of the filter barrel 17 can flow along the deflector 38 and flow out from the discharge pipe 37 to realize the collection of the insulating oil.

[0045] Working principle: Open valve 1 7 and valve 2 9, start vacuum oil filter 2, vacuumize pipeline 1 4, pipeline 2 5 and pipeline 3 6, then open valve 3 10 and valve 4 8 to transformer 1 The natural ester insulating oil in the oil is filtered, and impurities such as moisture, large particles, and dissolved gases in the insulating oil in the natural ester insulating oil transformer 1 are removed through the vacuum oil filter 2 to achieve the effect of preliminary filtration, and then after preliminary filtration The insulati...

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Abstract

The invention relates to the technical field of transformers, in particular to an oil filtering method for a natural ester insulating oil transformer. The oil filtering method comprises the following steps of: S1, carrying out oil sampling analysis on natural ester insulating oil injected into the transformer, judging the deterioration degree of the natural ester insulating oil according to a detection result, and adjusting the heating temperature and the flow of a vacuum oil filter in a vacuum pumping oil filtering system of the transformer according to the deterioration degree of an oil product; S2, opening a first valve and a second valve, starting a vacuum oil filter, vacuumizing a first pipeline, a second pipeline and a third pipeline, and then opening a third valve and a fourth valve to filter the natural ester insulating oil in the transformer. By carrying out preliminary filtering through using the vacuum oil filter, in the natural ester insulating oil filtering process, impurities of the natural ester insulating oil are reduced, the dielectric loss, an acid value and the like of the insulating oil are reduced, the oil quality is improved, and the oil injection efficiency is considered.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to an oil filtering method for natural ester insulating oil transformers. Background technique [0002] The physical and chemical properties of natural ester insulating oils are different from those of traditional mineral oils. At present, natural ester insulating oils have been well used in distribution transformers, and have gradually begun to be used in large power transformers. [0003] At present, when monitoring the oil injection and oil filtering process of natural ester insulating oil, part of the oil-soluble gas will be generated during the process of injecting the filtered oil into the transformer. [0004] The existing oil filtering method has poor oil filtering effect and low oil filtering efficiency when dealing with natural ester insulating oil; therefore, in view of the above problems, an oil filtering method for natural ester insulating oil transformers is propo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/00H01F27/14
CPCH01F41/00H01F27/14
Inventor 王勇黄青丹莫文雄王炜陈于晴赵崇智李助亚宋浩永黄慧红刘静
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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