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Method for recovering power transformer oil

A technology of a power transformer and a recovery method, applied in the direction of lubricating composition and the like, can solve the problems of weakened water absorption, increased working strength, complicated operation, etc., and achieve the effects of less water, high dielectric strength, and simple operation.

Inactive Publication Date: 2004-03-24
陈欢
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the desiccant is used, its water absorption will be weakened, so it usually needs to be filtered and tested many times, the operation is complicated, and it is easy to cause quality problems due to personnel operation.
In addition, the desiccant needs to be replaced frequently, which increases the work intensity and complicates the procedure

Method used

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Embodiment Construction

[0006] The present invention will be further described below in conjunction with embodiment.

[0007] The present invention utilizes the property that water boils and evaporates into gas due to the reduction of its boiling point under ultra-low pressure.

[0008] The oil is vacuumed to remove water from it. The specific implementation steps are:

[0009] Filter the transformer oil through a strainer to remove solid impurities.

[0010] The filtered transformer oil is placed in a closed pressure-resistant container. The container should contain an air extraction port. Use a vacuum pump to evacuate the container. When the pressure is lower than 0.005Mpa, keep it for 1-2 minutes.

[0011] After vacuum treatment, the oil sample was subjected to a high voltage needle electrode discharge test.

[0012] Finally, the processed transformer oil is sealed and filled.

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Abstract

The method for recovering power transformer oil includes the following agent: filtering transformer oil firstly, removing solid impurity, placing the oil into a closed tank, evacuating, finally making needle electrode discharge test, then seal-filling. As compared with existent technology it can completely remove water by means of one-step operation, its residual water content is less, and its insulating intensity is high, it has no need of changing drying agent, and its operation is simple.

Description

Technical field [0001] The invention relates to a method for recovering transformer oil in a power transformer. Background technique [0002] In the power system, most power transformers are used in the open air. Due to long-term exposure to the sun and rain, plus the temperature change caused by the change of the load, the air flow caused by the air pressure difference between the inside and outside of the transformer makes the water flow into the transformer. When the water content reaches above 100ppm-200ppm, the insulation strength of transformer oil will decrease, which will cause breakdown and short circuit, and endanger the safety of transformer and system. In order to solve this problem, the current practice is to regularly detect and change the oil of the transformer, and dewater the replaced transformer oil. The current dehydration method is to pass the oil through a filter with a desiccant, which absorbs the water in the oil, and takes a sample from the treated ...

Claims

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Application Information

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IPC IPC(8): C10M175/00
Inventor 陈欢
Owner 陈欢
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